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-rw-r--r--src/stmf0/Makefile-flash.defs61
-rw-r--r--src/stmf0/Makefile-stmf0.defs47
-rw-r--r--src/stmf0/Makefile.defs9
-rw-r--r--src/stmf0/altos-loader.ld95
-rw-r--r--src/stmf0/altos.ld98
-rw-r--r--src/stmf0/ao_adc_fast.c190
-rw-r--r--src/stmf0/ao_adc_fast.h89
-rw-r--r--src/stmf0/ao_arch.h157
-rw-r--r--src/stmf0/ao_arch_funcs.h400
-rw-r--r--src/stmf0/ao_boot_chain.c67
-rw-r--r--src/stmf0/ao_boot_pin.c46
-rw-r--r--src/stmf0/ao_crc.h58
-rw-r--r--src/stmf0/ao_dma_stm.c141
-rw-r--r--src/stmf0/ao_flash.h27
-rw-r--r--src/stmf0/ao_flash_loader_stm.c39
-rw-r--r--src/stmf0/ao_flash_stm.c131
-rw-r--r--src/stmf0/ao_flash_stm_pins.h38
-rw-r--r--src/stmf0/ao_interrupt.c185
-rw-r--r--src/stmf0/ao_led.c125
-rw-r--r--src/stmf0/ao_romconfig.c27
-rw-r--r--src/stmf0/ao_timer.c266
-rw-r--r--src/stmf0/ao_usb_stm.c1150
-rw-r--r--src/stmf0/registers.ld57
-rw-r--r--src/stmf0/stm32f0.h1667
24 files changed, 5170 insertions, 0 deletions
diff --git a/src/stmf0/Makefile-flash.defs b/src/stmf0/Makefile-flash.defs
new file mode 100644
index 00000000..706b93ee
--- /dev/null
+++ b/src/stmf0/Makefile-flash.defs
@@ -0,0 +1,61 @@
+include $(TOPDIR)/stmf0/Makefile-stmf0.defs
+
+INC = \
+ ao.h \
+ ao_arch.h \
+ ao_arch_funcs.h \
+ ao_flash_pins.h \
+ ao_flash_stm_pins.h \
+ ao_flash_task.h \
+ ao_pins.h \
+ ao_product.h \
+ Makefile
+
+#
+# Common AltOS sources
+#
+SRC = \
+ ao_interrupt.c \
+ ao_romconfig.c \
+ ao_boot_chain.c \
+ ao_boot_pin.c \
+ ao_product.c \
+ ao_notask.c \
+ ao_timer.c \
+ ao_usb_stm.c \
+ ao_flash_stm.c \
+ ao_flash_task.c \
+ ao_flash_loader_stm.c
+
+OBJ=$(SRC:.c=.o)
+
+PRODUCT=AltosFlash
+PRODUCT_DEF=-DALTOS_FLASH
+IDPRODUCT=0x000a
+
+CFLAGS = $(PRODUCT_DEF) $(STMF0_CFLAGS) -g -Os
+
+LDFLAGS=$(CFLAGS) -L$(TOPDIR)/stmf0 -Wl,-Taltos-loader.ld
+
+PROGNAME=altos-flash
+PROG=$(HARDWARE)-$(PROGNAME)-$(VERSION).elf
+
+$(PROG): Makefile $(OBJ) altos-loader.ld
+ $(call quiet,CC) $(LDFLAGS) $(CFLAGS) -o $(PROG) $(OBJ) $(LIBS)
+
+ao_product.h: ao-make-product.5c $(TOPDIR)/Version
+ $(call quiet,NICKLE,$<) $< -m altusmetrum.org -i $(IDPRODUCT) -p $(PRODUCT) -v $(VERSION) > $@
+
+$(OBJ): $(INC)
+
+all: $(PROG)
+
+distclean: clean
+
+clean:
+ rm -f *.o $(HARDWARE)-$(PROGNAME)-*.elf
+ rm -f ao_product.h
+
+install:
+
+uninstall:
diff --git a/src/stmf0/Makefile-stmf0.defs b/src/stmf0/Makefile-stmf0.defs
new file mode 100644
index 00000000..4862f46e
--- /dev/null
+++ b/src/stmf0/Makefile-stmf0.defs
@@ -0,0 +1,47 @@
+ifndef TOPDIR
+TOPDIR=..
+endif
+
+include $(TOPDIR)/Makedefs
+
+vpath % $(TOPDIR)/stmf0:$(TOPDIR)/product:$(TOPDIR)/drivers:$(TOPDIR)/kernel:$(TOPDIR)/util:$(TOPDIR)/kalman:$(TOPDIR/aes):$(TOPDIR):$(TOPDIR)/math
+vpath make-altitude $(TOPDIR)/util
+vpath make-kalman $(TOPDIR)/util
+vpath kalman.5c $(TOPDIR)/kalman
+vpath kalman_filter.5c $(TOPDIR)/kalman
+vpath load_csv.5c $(TOPDIR)/kalman
+vpath matrix.5c $(TOPDIR)/kalman
+vpath ao-make-product.5c $(TOPDIR)/util
+
+.SUFFIXES: .elf .ihx
+
+.elf.ihx:
+ $(ELFTOHEX) --output=$@ $*.elf
+
+ifndef VERSION
+include $(TOPDIR)/Version
+endif
+
+ELFTOHEX=$(TOPDIR)/../ao-tools/ao-elftohex/ao-elftohex
+CC=$(ARM_CC)
+
+WARN_FLAGS=-Wall -Wextra -Werror
+
+AO_CFLAGS=-I. -I$(TOPDIR)/stmf0 -I$(TOPDIR)/kernel -I$(TOPDIR)/drivers -I$(TOPDIR)/product -I$(TOPDIR) -I$(TOPDIR)/math $(PDCLIB_INCLUDES)
+STMF0_CFLAGS=-std=gnu99 -mlittle-endian -mcpu=cortex-m0 -mthumb\
+ -ffreestanding -nostdlib $(AO_CFLAGS) $(WARN_FLAGS)
+
+NICKLE=nickle
+
+LIBS=$(PDCLIB_LIBS_M0) -lgcc
+
+V=0
+# The user has explicitly enabled quiet compilation.
+ifeq ($(V),0)
+quiet = @printf " $1 $2 $@\n"; $($1)
+endif
+# Otherwise, print the full command line.
+quiet ?= $($1)
+
+.c.o:
+ $(call quiet,CC) -c $(CFLAGS) -o $@ $<
diff --git a/src/stmf0/Makefile.defs b/src/stmf0/Makefile.defs
new file mode 100644
index 00000000..a1d93eb5
--- /dev/null
+++ b/src/stmf0/Makefile.defs
@@ -0,0 +1,9 @@
+ifndef TOPDIR
+TOPDIR=..
+endif
+
+include $(TOPDIR)/stmf0/Makefile-stmf0.defs
+
+LDFLAGS=$(CFLAGS) -L$(TOPDIR)/stmf0 -Wl,-Taltos.ld
+
+.DEFAULT_GOAL=all
diff --git a/src/stmf0/altos-loader.ld b/src/stmf0/altos-loader.ld
new file mode 100644
index 00000000..86cf1838
--- /dev/null
+++ b/src/stmf0/altos-loader.ld
@@ -0,0 +1,95 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+MEMORY {
+ rom : ORIGIN = 0x08000000, LENGTH = 4K
+ ram : ORIGIN = 0x20000000, LENGTH = 6K
+}
+
+INCLUDE registers.ld
+
+EXTERN (stm_interrupt_vector)
+
+SECTIONS {
+ /*
+ * Rom contents
+ */
+
+ .interrupt : {
+ __text_start__ = .;
+ *(.interrupt) /* Interrupt vectors */
+ } > rom
+
+ .text ORIGIN(rom) + 0x100 : {
+ ao_romconfig.o(.romconfig*)
+ ao_product.o(.romconfig*)
+
+ *(.text*) /* Executable code */
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ *(.rodata*) /* Constants */
+ } > rom
+ __text_end__ = .;
+
+ /* Boot data which must live at the start of ram so that
+ * the application and bootloader share the same addresses.
+ * This must be all uninitialized data
+ */
+ .boot ORIGIN(ram) + SIZEOF(.interrupt) (NOLOAD) : {
+ __boot_start__ = .;
+ *(.boot)
+ __boot_end__ = .;
+ } >ram
+
+ /* Functions placed in RAM (required for flashing)
+ *
+ * Align to 8 bytes as that's what the ARM likes text
+ * segment alignments to be, and if we don't, then
+ * we end up with a mismatch between the location in
+ * ROM and the desired location in RAM. I don't
+ * entirely understand this, but at least this appears
+ * to work...
+ */
+
+ .textram BLOCK(8): {
+ __data_start__ = .;
+ __text_ram_start__ = .;
+ *(.ramtext)
+ __text_ram_end = .;
+ } >ram AT>rom
+
+ /* Data -- relocated to RAM, but written to ROM
+ */
+ .data : {
+ *(.data) /* initialized data */
+ __data_end__ = .;
+ } >ram AT>rom
+
+
+ .bss : {
+ __bss_start__ = .;
+ *(.bss)
+ *(COMMON)
+ __bss_end__ = .;
+ } >ram
+
+ PROVIDE(__stack__ = ORIGIN(ram) + LENGTH(ram));
+ PROVIDE(end = .);
+}
+
+ENTRY(start);
+
+
diff --git a/src/stmf0/altos.ld b/src/stmf0/altos.ld
new file mode 100644
index 00000000..9dbc83d0
--- /dev/null
+++ b/src/stmf0/altos.ld
@@ -0,0 +1,98 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+MEMORY {
+ rom (rx) : ORIGIN = 0x08001000, LENGTH = 28K
+ ram (!w) : ORIGIN = 0x20000000, LENGTH = 6k - 128
+ stack (!w) : ORIGIN = 0x20000000 + 6k - 128, LENGTH = 128
+}
+
+INCLUDE registers.ld
+
+EXTERN (stm_interrupt_vector)
+
+SECTIONS {
+ /*
+ * Rom contents
+ */
+
+ .interrupt ORIGIN(ram) : AT (ORIGIN(rom)) {
+ __interrupt_start__ = .;
+ __interrupt_rom__ = ORIGIN(rom);
+ *(.interrupt) /* Interrupt vectors */
+ __interrupt_end__ = .;
+ } > ram
+
+ .text ORIGIN(rom) + 0x100 : {
+ __text_start__ = .;
+
+ /* Ick. What I want is to specify the
+ * addresses of some global constants so
+ * that I can find them across versions
+ * of the application. I can't figure out
+ * how to make gnu ld do that, so instead
+ * we just load the two files that include
+ * these defines in the right order here and
+ * expect things to 'just work'. Don't change
+ * the contents of those files, ok?
+ */
+ ao_romconfig.o(.romconfig*)
+ ao_product.o(.romconfig*)
+
+ *(.text*) /* Executable code */
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ *(.rodata*) /* Constants */
+
+ } > rom
+ __text_end__ = .;
+
+ /* Boot data which must live at the start of ram so that
+ * the application and bootloader share the same addresses.
+ * This must be all uninitialized data
+ */
+ .boot (NOLOAD) : {
+ __boot_start__ = .;
+ *(.boot)
+ . = ALIGN(4);
+ __boot_end__ = .;
+ } >ram
+
+ /* Data -- relocated to RAM, but written to ROM
+ */
+ .data : {
+ __data_start__ = .;
+ *(.data) /* initialized data */
+ . = ALIGN(4);
+ __data_end__ = .;
+ } >ram AT>rom
+
+ .bss : {
+ __bss_start__ = .;
+ *(.bss)
+ *(COMMON)
+ . = ALIGN(4);
+ __bss_end__ = .;
+ } >ram
+
+ PROVIDE(end = .);
+
+ PROVIDE(__stack__ = ORIGIN(stack) + LENGTH(stack));
+}
+
+ENTRY(start);
+
+
diff --git a/src/stmf0/ao_adc_fast.c b/src/stmf0/ao_adc_fast.c
new file mode 100644
index 00000000..be9b5986
--- /dev/null
+++ b/src/stmf0/ao_adc_fast.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_adc_fast.h>
+
+uint16_t ao_adc_ring[AO_ADC_RING_SIZE];
+
+uint16_t ao_adc_ring_head, ao_adc_ring_tail;
+uint8_t ao_adc_running;
+
+/*
+ * Callback from DMA ISR
+ *
+ * Mark time in ring, shut down DMA engine
+ */
+static void ao_adc_dma_done(int index)
+{
+ (void) index;
+ ao_adc_ring_head += AO_ADC_RING_CHUNK;
+ if (ao_adc_ring_head == AO_ADC_RING_SIZE)
+ ao_adc_ring_head = 0;
+ ao_adc_running = 0;
+ ao_wakeup(&ao_adc_ring_head);
+ ao_dma_done_transfer(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1));
+}
+
+void
+_ao_adc_start(void)
+{
+ uint16_t *buf;
+
+ if (ao_adc_running)
+ return;
+ if (_ao_adc_space() < AO_ADC_RING_CHUNK)
+ return;
+ ao_adc_running = 1;
+ buf = ao_adc_ring + ao_adc_ring_head;
+ stm_adc.isr = 0;
+ ao_dma_set_transfer(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1),
+ &stm_adc.dr,
+ buf,
+ AO_ADC_RING_CHUNK,
+ (0 << STM_DMA_CCR_MEM2MEM) |
+ (STM_DMA_CCR_PL_HIGH << STM_DMA_CCR_PL) |
+ (STM_DMA_CCR_MSIZE_16 << STM_DMA_CCR_MSIZE) |
+ (STM_DMA_CCR_PSIZE_16 << STM_DMA_CCR_PSIZE) |
+ (1 << STM_DMA_CCR_MINC) |
+ (0 << STM_DMA_CCR_PINC) |
+ (0 << STM_DMA_CCR_CIRC) |
+ (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
+ ao_dma_set_isr(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1), ao_adc_dma_done);
+ ao_dma_start(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1));
+
+ stm_adc.cr |= (1 << STM_ADC_CR_ADSTART);
+}
+
+void
+ao_adc_init(void)
+{
+ uint32_t chselr;
+ int i;
+
+ /* Reset ADC */
+ stm_rcc.apb2rstr |= (1 << STM_RCC_APB2RSTR_ADCRST);
+ stm_rcc.apb2rstr &= ~(1 << STM_RCC_APB2RSTR_ADCRST);
+
+ /* Turn on ADC pins */
+ stm_rcc.ahbenr |= AO_ADC_RCC_AHBENR;
+
+#ifdef AO_ADC_PIN0_PORT
+ stm_moder_set(AO_ADC_PIN0_PORT, AO_ADC_PIN0_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN1_PORT
+ stm_moder_set(AO_ADC_PIN1_PORT, AO_ADC_PIN1_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN2_PORT
+ stm_moder_set(AO_ADC_PIN2_PORT, AO_ADC_PIN2_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN3_PORT
+ stm_moder_set(AO_ADC_PIN3_PORT, AO_ADC_PIN3_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN4_PORT
+ stm_moder_set(AO_ADC_PIN4_PORT, AO_ADC_PIN4_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN5_PORT
+ stm_moder_set(AO_ADC_PIN5_PORT, AO_ADC_PIN5_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN6_PORT
+ stm_moder_set(AO_ADC_PIN6_PORT, AO_ADC_PIN6_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN7_PORT
+ stm_moder_set(AO_ADC_PIN7_PORT, AO_ADC_PIN7_PIN, STM_MODER_ANALOG);
+#endif
+#ifdef AO_ADC_PIN24_PORT
+ #error "Too many ADC ports"
+#endif
+
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_ADCEN);
+
+ chselr = 0;
+#if AO_NUM_ADC > 0
+ chselr |= (1 << AO_ADC_PIN0_CH);
+#endif
+#if AO_NUM_ADC > 1
+ chselr |= (1 << AO_ADC_PIN1_CH);
+#endif
+#if AO_NUM_ADC > 2
+ chselr |= (1 << AO_ADC_PIN2_CH);
+#endif
+#if AO_NUM_ADC > 3
+ chselr |= (1 << AO_ADC_PIN3_CH);
+#endif
+#if AO_NUM_ADC > 4
+ chselr |= (1 << AO_ADC_PIN4_CH);
+#endif
+#if AO_NUM_ADC > 5
+ chselr |= (1 << AO_ADC_PIN5_CH);
+#endif
+#if AO_NUM_ADC > 6
+ chselr |= (1 << AO_ADC_PIN6_CH);
+#endif
+#if AO_NUM_ADC > 7
+ chselr |= (1 << AO_ADC_PIN7_CH);
+#endif
+#if AO_NUM_ADC > 8
+#error Need more ADC defines
+#endif
+ stm_adc.chselr = chselr;
+
+ /* Set the clock */
+ stm_adc.cfgr2 = STM_ADC_CFGR2_CKMODE_PCLK_2 << STM_ADC_CFGR2_CKMODE;
+
+ /* Shortest sample time */
+ stm_adc.smpr = STM_ADC_SMPR_SMP_1_5 << STM_ADC_SMPR_SMP;
+
+ /* Calibrate */
+ stm_adc.cr |= (1 << STM_ADC_CR_ADCAL);
+ for (i = 0; i < 0xf000; i++) {
+ if ((stm_adc.cr & (1 << STM_ADC_CR_ADCAL)) == 0)
+ break;
+ }
+
+ /* Enable */
+ stm_adc.cr |= (1 << STM_ADC_CR_ADEN);
+ while ((stm_adc.isr & (1 << STM_ADC_ISR_ADRDY)) == 0)
+ ;
+
+ stm_adc.cfgr1 = ((0 << STM_ADC_CFGR1_AWDCH) |
+ (0 << STM_ADC_CFGR1_AWDEN) |
+ (0 << STM_ADC_CFGR1_AWDSGL) |
+ (0 << STM_ADC_CFGR1_DISCEN) |
+ (0 << STM_ADC_CFGR1_AUTOOFF) |
+ (1 << STM_ADC_CFGR1_WAIT) |
+ (1 << STM_ADC_CFGR1_CONT) |
+ (0 << STM_ADC_CFGR1_OVRMOD) |
+ (STM_ADC_CFGR1_EXTEN_DISABLE << STM_ADC_CFGR1_EXTEN) |
+ (0 << STM_ADC_CFGR1_ALIGN) |
+ (STM_ADC_CFGR1_RES_12 << STM_ADC_CFGR1_RES) |
+ (STM_ADC_CFGR1_SCANDIR_UP << STM_ADC_CFGR1_SCANDIR) |
+ (STM_ADC_CFGR1_DMACFG_ONESHOT << STM_ADC_CFGR1_DMACFG) |
+ (1 << STM_ADC_CFGR1_DMAEN));
+ stm_adc.ccr = 0;
+
+ /* Clear any stale status bits */
+ stm_adc.isr = 0;
+
+ /* Turn on syscfg */
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN);
+
+ /* Set ADC to use DMA channel 1 (option 1) */
+ stm_syscfg.cfgr1 &= ~(1 << STM_SYSCFG_CFGR1_ADC_DMA_RMP);
+
+ ao_dma_alloc(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1));
+ ao_dma_set_isr(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC_1), ao_adc_dma_done);
+}
diff --git a/src/stmf0/ao_adc_fast.h b/src/stmf0/ao_adc_fast.h
new file mode 100644
index 00000000..eec45505
--- /dev/null
+++ b/src/stmf0/ao_adc_fast.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_ADC_FAST_H_
+#define _AO_ADC_FAST_H_
+
+void
+ao_adc_read(uint16_t *dest, int len);
+
+void
+ao_adc_init(void);
+
+/* Total ring size in samples */
+#define AO_ADC_RING_SIZE 256
+/* Number of samples fetched per ao_adc_start call */
+#define AO_ADC_RING_CHUNK (AO_ADC_RING_SIZE >> 1)
+
+extern uint16_t ao_adc_ring[AO_ADC_RING_SIZE];
+
+#define ao_adc_ring_step(pos,inc) (((pos) + (inc)) & (AO_ADC_RING_SIZE - 1))
+
+extern uint16_t ao_adc_ring_head, ao_adc_ring_tail;
+extern uint8_t ao_adc_running;
+
+void
+_ao_adc_start(void);
+
+static inline uint16_t
+_ao_adc_remain(void)
+{
+ if (ao_adc_ring_tail > ao_adc_ring_head)
+ return AO_ADC_RING_SIZE - ao_adc_ring_tail;
+ return ao_adc_ring_head - ao_adc_ring_tail;
+}
+
+static inline uint16_t
+_ao_adc_space(void)
+{
+ if (ao_adc_ring_head == ao_adc_ring_tail)
+ return AO_ADC_RING_SIZE;
+ if (ao_adc_ring_head > ao_adc_ring_tail)
+ return AO_ADC_RING_SIZE - ao_adc_ring_head;
+ return ao_adc_ring_tail - ao_adc_ring_head;
+}
+
+static inline uint16_t *
+ao_adc_get(uint16_t n)
+{
+ if (ao_adc_ring_tail + n > AO_ADC_RING_SIZE)
+ ao_panic(AO_PANIC_ADC);
+ ao_arch_block_interrupts();
+ while (_ao_adc_remain() < n) {
+ if (!ao_adc_running)
+ _ao_adc_start();
+ ao_sleep(&ao_adc_ring_head);
+ }
+ ao_arch_release_interrupts();
+ return &ao_adc_ring[ao_adc_ring_tail];
+}
+
+static inline void
+ao_adc_ack(uint16_t n)
+{
+ if (ao_adc_ring_tail + n > AO_ADC_RING_SIZE)
+ ao_panic(AO_PANIC_ADC);
+ ao_arch_block_interrupts();
+ ao_adc_ring_tail += n;
+ if (ao_adc_ring_tail == AO_ADC_RING_SIZE)
+ ao_adc_ring_tail = 0;
+ if (!ao_adc_running && _ao_adc_space() >= AO_ADC_RING_CHUNK)
+ _ao_adc_start();
+ ao_arch_release_interrupts();
+}
+
+#endif /* _AO_ADC_FAST_H_ */
diff --git a/src/stmf0/ao_arch.h b/src/stmf0/ao_arch.h
new file mode 100644
index 00000000..6ee71ef9
--- /dev/null
+++ b/src/stmf0/ao_arch.h
@@ -0,0 +1,157 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_ARCH_H_
+#define _AO_ARCH_H_
+
+#include <stdio.h>
+#include <stm32f0.h>
+
+/*
+ * STM32F0 definitions and code fragments for AltOS
+ */
+
+#define AO_STACK_SIZE 512
+
+#define AO_LED_TYPE uint16_t
+
+#ifndef AO_TICK_TYPE
+#define AO_TICK_TYPE uint16_t
+#define AO_TICK_SIGNED int16_t
+#endif
+
+#define AO_PORT_TYPE uint16_t
+
+/* Various definitions to make GCC look more like SDCC */
+
+#define ao_arch_naked_declare __attribute__((naked))
+#define ao_arch_naked_define
+#define __pdata
+#define __data
+#define __xdata
+#define __code const
+#define __reentrant
+#define __interrupt(n)
+#define __at(n)
+
+#define ao_arch_reboot() \
+ (stm_scb.aircr = ((STM_SCB_AIRCR_VECTKEY_KEY << STM_SCB_AIRCR_VECTKEY) | \
+ (1 << STM_SCB_AIRCR_SYSRESETREQ)))
+
+#define ao_arch_nop() asm("nop")
+
+#define ao_arch_interrupt(n) /* nothing */
+
+#undef putchar
+#undef getchar
+#define putchar(c) ao_putchar(c)
+#define getchar ao_getchar
+
+extern void putchar(char c);
+extern char getchar(void);
+extern void ao_avr_stdio_init(void);
+
+
+/*
+ * ao_romconfig.c
+ */
+
+#define AO_ROMCONFIG_VERSION 2
+
+#define AO_ROMCONFIG_SYMBOL(a) __attribute__((section(".romconfig"))) const
+
+extern const uint16_t ao_romconfig_version;
+extern const uint16_t ao_romconfig_check;
+extern const uint16_t ao_serial_number;
+extern const uint32_t ao_radio_cal;
+
+#define ao_arch_task_members\
+ uint32_t *sp; /* saved stack pointer */
+
+#define ao_arch_block_interrupts() asm("cpsid i")
+#define ao_arch_release_interrupts() asm("cpsie i")
+
+/*
+ * ao_timer.c
+ *
+ * For the stm32f042, we want to use the USB-based HSI48 clock
+ */
+
+#if AO_HSI48
+
+#define AO_SYSCLK 48000000
+#define AO_HCLK (AO_SYSCLK / AO_AHB_PRESCALER)
+
+#endif
+
+#if AO_HSE || AO_HSI
+
+#if AO_HSE
+#define AO_PLLSRC AO_HSE
+#else
+#define AO_PLLSRC STM_HSI_FREQ
+#endif
+
+#define AO_PLLVCO (AO_PLLSRC * AO_PLLMUL)
+#define AO_SYSCLK (AO_PLLVCO / AO_PLLDIV)
+
+#endif
+
+#define AO_HCLK (AO_SYSCLK / AO_AHB_PRESCALER)
+#define AO_PCLK1 (AO_HCLK / AO_APB1_PRESCALER)
+#define AO_PCLK2 (AO_HCLK / AO_APB2_PRESCALER)
+#define AO_SYSTICK (AO_HCLK)
+
+#if AO_APB1_PRESCALER == 1
+#define AO_TIM23467_CLK AO_PCLK1
+#else
+#define AO_TIM23467_CLK (2 * AO_PCLK1)
+#endif
+
+#if AO_APB2_PRESCALER == 1
+#define AO_TIM91011_CLK AO_PCLK2
+#else
+#define AO_TIM91011_CLK (2 * AO_PCLK2)
+#endif
+
+#define AO_STM_NVIC_HIGH_PRIORITY 4
+#define AO_STM_NVIC_CLOCK_PRIORITY 6
+#define AO_STM_NVIC_MED_PRIORITY 8
+#define AO_STM_NVIC_LOW_PRIORITY 10
+
+void ao_lcd_stm_init(void);
+
+void ao_lcd_font_init(void);
+
+void ao_lcd_font_string(char *s);
+
+extern const uint32_t ao_radio_cal;
+
+void
+ao_adc_init();
+
+/* ADC maximum reported value */
+#define AO_ADC_MAX 4095
+
+#define AO_BOOT_APPLICATION_BASE ((uint32_t *) 0x08001000)
+#define AO_BOOT_APPLICATION_BOUND ((uint32_t *) (0x08000000 + stm_flash_size()))
+#define AO_BOOT_LOADER_BASE ((uint32_t *) 0x08000000)
+#define HAS_BOOT_LOADER 1
+
+#endif /* _AO_ARCH_H_ */
+
+
diff --git a/src/stmf0/ao_arch_funcs.h b/src/stmf0/ao_arch_funcs.h
new file mode 100644
index 00000000..3db96be2
--- /dev/null
+++ b/src/stmf0/ao_arch_funcs.h
@@ -0,0 +1,400 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_ARCH_FUNCS_H_
+#define _AO_ARCH_FUNCS_H_
+
+/* ao_spi_stm.c
+ */
+
+/* PCLK is set to 16MHz (HCLK 32MHz, APB prescaler 2) */
+
+#define AO_SPI_SPEED_8MHz STM_SPI_CR1_BR_PCLK_2
+#define AO_SPI_SPEED_4MHz STM_SPI_CR1_BR_PCLK_4
+#define AO_SPI_SPEED_2MHz STM_SPI_CR1_BR_PCLK_8
+#define AO_SPI_SPEED_1MHz STM_SPI_CR1_BR_PCLK_16
+#define AO_SPI_SPEED_500kHz STM_SPI_CR1_BR_PCLK_32
+#define AO_SPI_SPEED_250kHz STM_SPI_CR1_BR_PCLK_64
+#define AO_SPI_SPEED_125kHz STM_SPI_CR1_BR_PCLK_128
+#define AO_SPI_SPEED_62500Hz STM_SPI_CR1_BR_PCLK_256
+
+#define AO_SPI_SPEED_FAST AO_SPI_SPEED_8MHz
+
+/* Companion bus wants something no faster than 200kHz */
+
+#define AO_SPI_SPEED_200kHz AO_SPI_SPEED_125kHz
+
+#define AO_SPI_CONFIG_1 0x00
+#define AO_SPI_1_CONFIG_PA5_PA6_PA7 AO_SPI_CONFIG_1
+#define AO_SPI_2_CONFIG_PB13_PB14_PB15 AO_SPI_CONFIG_1
+
+#define AO_SPI_CONFIG_2 0x04
+#define AO_SPI_1_CONFIG_PB3_PB4_PB5 AO_SPI_CONFIG_2
+#define AO_SPI_2_CONFIG_PD1_PD3_PD4 AO_SPI_CONFIG_2
+
+#define AO_SPI_CONFIG_3 0x08
+#define AO_SPI_1_CONFIG_PE13_PE14_PE15 AO_SPI_CONFIG_3
+
+#define AO_SPI_CONFIG_NONE 0x0c
+
+#define AO_SPI_INDEX_MASK 0x01
+#define AO_SPI_CONFIG_MASK 0x0c
+
+#define AO_SPI_1_PA5_PA6_PA7 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PA5_PA6_PA7)
+#define AO_SPI_1_PB3_PB4_PB5 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PB3_PB4_PB5)
+#define AO_SPI_1_PE13_PE14_PE15 (STM_SPI_INDEX(1) | AO_SPI_1_CONFIG_PE13_PE14_PE15)
+
+#define AO_SPI_2_PB13_PB14_PB15 (STM_SPI_INDEX(2) | AO_SPI_2_CONFIG_PB13_PB14_PB15)
+#define AO_SPI_2_PD1_PD3_PD4 (STM_SPI_INDEX(2) | AO_SPI_2_CONFIG_PD1_PD3_PD4)
+
+#define AO_SPI_INDEX(id) ((id) & AO_SPI_INDEX_MASK)
+#define AO_SPI_CONFIG(id) ((id) & AO_SPI_CONFIG_MASK)
+
+uint8_t
+ao_spi_try_get(uint8_t spi_index, uint32_t speed, uint8_t task_id);
+
+void
+ao_spi_get(uint8_t spi_index, uint32_t speed);
+
+void
+ao_spi_put(uint8_t spi_index);
+
+void
+ao_spi_send(const void *block, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_send_sync(void *block, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index);
+
+extern uint16_t ao_spi_speed[STM_NUM_SPI];
+
+void
+ao_spi_init(void);
+
+#define ao_spi_set_cs(reg,mask) ((reg)->bsrr = ((uint32_t) (mask)) << 16)
+#define ao_spi_clr_cs(reg,mask) ((reg)->bsrr = (mask))
+
+#define ao_spi_get_mask(reg,mask,bus, speed) do { \
+ ao_spi_get(bus, speed); \
+ ao_spi_set_cs(reg,mask); \
+ } while (0)
+
+static inline uint8_t
+ao_spi_try_get_mask(struct stm_gpio *reg, uint16_t mask, uint8_t bus, uint32_t speed, uint8_t task_id)
+{
+ if (!ao_spi_try_get(bus, speed, task_id))
+ return 0;
+ ao_spi_set_cs(reg, mask);
+ return 1;
+}
+
+#define ao_spi_put_mask(reg,mask,bus) do { \
+ ao_spi_clr_cs(reg,mask); \
+ ao_spi_put(bus); \
+ } while (0)
+
+#define ao_spi_get_bit(reg,bit,pin,bus,speed) ao_spi_get_mask(reg,(1<<bit),bus,speed)
+#define ao_spi_put_bit(reg,bit,pin,bus) ao_spi_put_mask(reg,(1<<bit),bus)
+
+#define ao_enable_port(port) do { \
+ if ((port) == &stm_gpioa) \
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_IOPAEN); \
+ else if ((port) == &stm_gpiob) \
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_IOPBEN); \
+ else if ((port) == &stm_gpioc) \
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_IOPCEN); \
+ else if ((port) == &stm_gpiof) \
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_IOPFEN); \
+ } while (0)
+
+#define ao_disable_port(port) do { \
+ if ((port) == &stm_gpioa) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_IOPAEN); \
+ else if ((port) == &stm_gpiob) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_IOPBEN); \
+ else if ((port) == &stm_gpioc) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_IOPCEN); \
+ else if ((port) == &stm_gpiof) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_IOPFEN); \
+ } while (0)
+
+#define ao_gpio_set(port, bit, pin, v) stm_gpio_set(port, bit, v)
+
+#define ao_gpio_get(port, bit, pin) stm_gpio_get(port, bit)
+
+#define ao_enable_output(port,bit,pin,v) do { \
+ ao_enable_port(port); \
+ ao_gpio_set(port, bit, pin, v); \
+ stm_moder_set(port, bit, STM_MODER_OUTPUT);\
+ } while (0)
+
+#define ao_gpio_set_mode(port,bit,mode) do { \
+ if (mode == AO_EXTI_MODE_PULL_UP) \
+ stm_pupdr_set(port, bit, STM_PUPDR_PULL_UP); \
+ else if (mode == AO_EXTI_MODE_PULL_DOWN) \
+ stm_pupdr_set(port, bit, STM_PUPDR_PULL_DOWN); \
+ else \
+ stm_pupdr_set(port, bit, STM_PUPDR_NONE); \
+ } while (0)
+
+#define ao_enable_input(port,bit,mode) do { \
+ ao_enable_port(port); \
+ stm_moder_set(port, bit, STM_MODER_INPUT); \
+ ao_gpio_set_mode(port, bit, mode); \
+ } while (0)
+
+#define ao_enable_cs(port,bit) do { \
+ stm_gpio_set((port), bit, 1); \
+ stm_moder_set((port), bit, STM_MODER_OUTPUT); \
+ } while (0)
+
+#define ao_spi_init_cs(port, mask) do { \
+ ao_enable_port(port); \
+ if ((mask) & 0x0001) ao_enable_cs(port, 0); \
+ if ((mask) & 0x0002) ao_enable_cs(port, 1); \
+ if ((mask) & 0x0004) ao_enable_cs(port, 2); \
+ if ((mask) & 0x0008) ao_enable_cs(port, 3); \
+ if ((mask) & 0x0010) ao_enable_cs(port, 4); \
+ if ((mask) & 0x0020) ao_enable_cs(port, 5); \
+ if ((mask) & 0x0040) ao_enable_cs(port, 6); \
+ if ((mask) & 0x0080) ao_enable_cs(port, 7); \
+ if ((mask) & 0x0100) ao_enable_cs(port, 8); \
+ if ((mask) & 0x0200) ao_enable_cs(port, 9); \
+ if ((mask) & 0x0400) ao_enable_cs(port, 10);\
+ if ((mask) & 0x0800) ao_enable_cs(port, 11);\
+ if ((mask) & 0x1000) ao_enable_cs(port, 12);\
+ if ((mask) & 0x2000) ao_enable_cs(port, 13);\
+ if ((mask) & 0x4000) ao_enable_cs(port, 14);\
+ if ((mask) & 0x8000) ao_enable_cs(port, 15);\
+ } while (0)
+
+/* ao_dma_stm.c
+ */
+
+extern uint8_t ao_dma_done[STM_NUM_DMA];
+
+void
+ao_dma_set_transfer(uint8_t index,
+ volatile void *peripheral,
+ void *memory,
+ uint16_t count,
+ uint32_t ccr);
+
+void
+ao_dma_set_isr(uint8_t index, void (*isr)(int index));
+
+void
+ao_dma_start(uint8_t index);
+
+void
+ao_dma_done_transfer(uint8_t index);
+
+void
+ao_dma_abort(uint8_t index);
+
+void
+ao_dma_alloc(uint8_t index);
+
+void
+ao_dma_init(void);
+
+/* ao_i2c_stm.c */
+
+void
+ao_i2c_get(uint8_t i2c_index);
+
+uint8_t
+ao_i2c_start(uint8_t i2c_index, uint16_t address);
+
+void
+ao_i2c_put(uint8_t i2c_index);
+
+uint8_t
+ao_i2c_send(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop);
+
+uint8_t
+ao_i2c_recv(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop);
+
+void
+ao_i2c_init(void);
+
+/* ao_serial_stm.c */
+struct ao_stm_usart {
+ struct ao_fifo rx_fifo;
+ struct ao_fifo tx_fifo;
+ struct stm_usart *reg;
+ uint8_t tx_started;
+};
+
+#if HAS_SERIAL_1
+extern struct ao_stm_usart ao_stm_usart1;
+#endif
+
+#if HAS_SERIAL_2
+extern struct ao_stm_usart ao_stm_usart2;
+#endif
+
+#if HAS_SERIAL_3
+extern struct ao_stm_usart ao_stm_usart3;
+#endif
+
+#define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
+
+typedef uint32_t ao_arch_irq_t;
+
+static inline uint32_t
+ao_arch_irqsave(void) {
+ uint32_t primask;
+ asm("mrs %0,primask" : "=&r" (primask));
+ ao_arch_block_interrupts();
+ return primask;
+}
+
+static inline void
+ao_arch_irqrestore(uint32_t primask) {
+ asm("msr primask,%0" : : "r" (primask));
+}
+
+static inline void
+ao_arch_memory_barrier() {
+ asm volatile("" ::: "memory");
+}
+
+#if HAS_TASK
+static inline void
+ao_arch_init_stack(struct ao_task *task, void *start)
+{
+ uint32_t *sp = (uint32_t *) (task->stack + AO_STACK_SIZE);
+ uint32_t a = (uint32_t) start;
+ int i;
+
+ /* Return address (goes into LR) */
+ ARM_PUSH32(sp, a);
+
+ /* Clear register values r0-r7 */
+ i = 8;
+ while (i--)
+ ARM_PUSH32(sp, 0);
+
+ /* APSR */
+ ARM_PUSH32(sp, 0);
+
+ /* PRIMASK with interrupts enabled */
+ ARM_PUSH32(sp, 0);
+
+ task->sp = sp;
+}
+
+static inline void ao_arch_save_regs(void) {
+ /* Save general registers */
+ asm("push {r0-r7,lr}\n");
+
+ /* Save APSR */
+ asm("mrs r0,apsr");
+ asm("push {r0}");
+
+ /* Save PRIMASK */
+ asm("mrs r0,primask");
+ asm("push {r0}");
+}
+
+static inline void ao_arch_save_stack(void) {
+ uint32_t *sp;
+ asm("mov %0,sp" : "=&r" (sp) );
+ ao_cur_task->sp = (sp);
+ if ((uint8_t *) sp < &ao_cur_task->stack[0])
+ ao_panic (AO_PANIC_STACK);
+}
+
+static inline void ao_arch_restore_stack(void) {
+ uint32_t sp;
+ sp = (uint32_t) ao_cur_task->sp;
+
+ /* Switch stacks */
+ asm("mov sp, %0" : : "r" (sp) );
+
+ /* Restore PRIMASK */
+ asm("pop {r0}");
+ asm("msr primask,r0");
+
+ /* Restore APSR */
+ asm("pop {r0}");
+ asm("msr apsr_nczvq,r0");
+
+ /* Restore general registers */
+ asm("pop {r0-r7,pc}\n");
+}
+
+#ifndef HAS_SAMPLE_PROFILE
+#define HAS_SAMPLE_PROFILE 0
+#endif
+
+#if !HAS_SAMPLE_PROFILE
+#define HAS_ARCH_START_SCHEDULER 1
+
+static inline void ao_arch_start_scheduler(void) {
+ uint32_t sp;
+ uint32_t control;
+
+ asm("mrs %0,msp" : "=&r" (sp));
+ asm("msr psp,%0" : : "r" (sp));
+ asm("mrs %0,control" : "=&r" (control));
+ control |= (1 << 1);
+ asm("msr control,%0" : : "r" (control));
+ asm("isb");
+}
+#endif
+
+#define ao_arch_isr_stack()
+
+#endif
+
+#define ao_arch_wait_interrupt() do { \
+ asm("\twfi\n"); \
+ ao_arch_release_interrupts(); \
+ asm(".global ao_idle_loc\nao_idle_loc:"); \
+ ao_arch_block_interrupts(); \
+ } while (0)
+
+#define ao_arch_critical(b) do { \
+ uint32_t __mask = ao_arch_irqsave(); \
+ do { b } while (0); \
+ ao_arch_irqrestore(__mask); \
+ } while (0)
+
+/* ao_usb_stm.c */
+
+#if AO_USB_DIRECTIO
+uint16_t *
+ao_usb_alloc(void);
+
+void
+ao_usb_free(uint16_t *buffer);
+
+void
+ao_usb_write(uint16_t *buffer, uint16_t len);
+#endif /* AO_USB_DIRECTIO */
+
+#endif /* _AO_ARCH_FUNCS_H_ */
diff --git a/src/stmf0/ao_boot_chain.c b/src/stmf0/ao_boot_chain.c
new file mode 100644
index 00000000..83a543a0
--- /dev/null
+++ b/src/stmf0/ao_boot_chain.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_boot.h>
+
+void
+ao_boot_chain(uint32_t *base)
+{
+ uint32_t sp;
+ uint32_t pc;
+
+ sp = base[0];
+ pc = base[1];
+ if (0x08000100 <= pc && pc <= 0x08200000 && (pc & 1) == 1) {
+ asm ("mov sp, %0" : : "r" (sp));
+ asm ("mov lr, %0" : : "r" (pc));
+ asm ("bx lr");
+ }
+}
+
+#define AO_BOOT_SIGNAL 0x5a5aa5a5
+#define AO_BOOT_CHECK 0xc3c33c3c
+
+struct ao_boot {
+ uint32_t *base;
+ uint32_t signal;
+ uint32_t check;
+};
+
+static struct ao_boot __attribute__ ((section(".boot"))) ao_boot;
+
+int
+ao_boot_check_chain(void)
+{
+ if (ao_boot.signal == AO_BOOT_SIGNAL && ao_boot.check == AO_BOOT_CHECK) {
+ ao_boot.signal = 0;
+ ao_boot.check = 0;
+ if (ao_boot.base == AO_BOOT_FORCE_LOADER)
+ return 0;
+ ao_boot_chain(ao_boot.base);
+ }
+ return 1;
+}
+
+void
+ao_boot_reboot(uint32_t *base)
+{
+ ao_boot.base = base;
+ ao_boot.signal = AO_BOOT_SIGNAL;
+ ao_boot.check = AO_BOOT_CHECK;
+ ao_arch_reboot();
+}
diff --git a/src/stmf0/ao_boot_pin.c b/src/stmf0/ao_boot_pin.c
new file mode 100644
index 00000000..e825b618
--- /dev/null
+++ b/src/stmf0/ao_boot_pin.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_boot.h>
+#include <ao_exti.h>
+
+void
+ao_boot_check_pin(void)
+{
+ uint16_t v;
+
+ /* Enable power interface clock */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
+
+ /* Enable the input pin */
+ ao_enable_input(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN,
+ AO_BOOT_APPLICATION_MODE);
+
+ for (v = 0; v < 100; v++)
+ ao_arch_nop();
+
+ /* Read the value */
+ v = stm_gpio_get(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN);
+
+ /* Reset the chip to turn off the port and the power interface clock */
+ ao_gpio_set_mode(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN, 0);
+ ao_disable_port(&AO_BOOT_APPLICATION_GPIO);
+ stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_PWREN);
+ if (v == AO_BOOT_APPLICATION_VALUE)
+ ao_boot_chain(AO_BOOT_APPLICATION_BASE);
+}
diff --git a/src/stmf0/ao_crc.h b/src/stmf0/ao_crc.h
new file mode 100644
index 00000000..cd011d3a
--- /dev/null
+++ b/src/stmf0/ao_crc.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_CRC_H_
+#define _AO_CRC_H_
+
+#define AO_CRC_16_CCITT 0x1021
+#define AO_CRC_16_CDMA2000 0xc867
+#define AO_CRC_16_DECT 0x0589
+#define AO_CRC_16_T10_DIF 0x8bb7
+#define AO_CRC_16_DNP 0x3d65
+#define AO_CRC_16_ANSI 0x8005
+#define AO_CRC_16_DEFAULT AO_CRC_16_ANSI
+
+#define AO_CRC_32_ANSI 0x04c11db7
+#define AO_CRC_32_C 0x1edc6f41
+
+#define AO_CRC_32_DEFAULT AO_CRC_32_ANSI
+
+static inline uint16_t
+ao_crc_in_32_out_16(uint32_t v) {
+ stm_crc.dr.u32 = v;
+ return stm_crc.dr.u16;
+}
+
+static inline uint16_t
+ao_crc_in_16_out_16(uint16_t v) {
+ stm_crc.dr.u16 = v;
+ return stm_crc.dr.u16;
+}
+
+static inline uint16_t
+ao_crc_in_8_out_16(uint8_t v) {
+ stm_crc.dr.u8 = v;
+ return stm_crc.dr.u16;
+}
+
+void
+ao_crc_reset(void);
+
+void
+ao_crc_init(void);
+
+#endif /* _AO_CRC_H_ */
diff --git a/src/stmf0/ao_dma_stm.c b/src/stmf0/ao_dma_stm.c
new file mode 100644
index 00000000..78fabe18
--- /dev/null
+++ b/src/stmf0/ao_dma_stm.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+struct ao_dma_config {
+ void (*isr)(int index);
+};
+
+uint8_t ao_dma_done[STM_NUM_DMA];
+
+static struct ao_dma_config ao_dma_config[STM_NUM_DMA];
+static uint8_t ao_dma_allocated[STM_NUM_DMA];
+static uint8_t ao_dma_mutex[STM_NUM_DMA];
+static uint8_t ao_dma_active;
+
+#define id(ch) STM_DMA_INDEX(ch)
+#define id_mask(id) (STM_DMA_ISR_MASK << (id))
+#define ch_mask(ch) id_mask(id(ch))
+
+static void
+ao_dma_isr(uint8_t low_index, uint8_t high_index, uint32_t mask) {
+ /* Get channel interrupt bits */
+ uint32_t isr = stm_dma.isr & mask;
+ uint8_t index;
+
+ /* Ack them */
+ stm_dma.ifcr = isr;
+ for (index = low_index; index <= high_index; index++) {
+ if (isr & id_mask(index)) {
+ if (ao_dma_config[index].isr)
+ (*ao_dma_config[index].isr)(index);
+ else {
+ ao_dma_done[index] = 1;
+ ao_wakeup(&ao_dma_done[index]);
+ }
+ }
+ }
+}
+
+void stm_dma_ch1_isr(void) { ao_dma_isr(id(1), id(1), ch_mask(1)); }
+void stm_dma_ch2_3_isr(void) { ao_dma_isr(id(2), id(3), ch_mask(2) | ch_mask(3)); }
+void stm_dma1_ch4_5_6_isr(void) { ao_dma_isr(id(4), id(6), ch_mask(4) | ch_mask(5) | ch_mask(6)); }
+
+void
+ao_dma_set_transfer(uint8_t index,
+ volatile void *peripheral,
+ void *memory,
+ uint16_t count,
+ uint32_t ccr)
+{
+ if (ao_dma_allocated[index]) {
+ if (ao_dma_mutex[index])
+ ao_panic(AO_PANIC_DMA);
+ ao_dma_mutex[index] = 1;
+ } else
+ ao_mutex_get(&ao_dma_mutex[index]);
+ ao_arch_critical(
+ if (ao_dma_active++ == 0)
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_DMAEN);
+ );
+ stm_dma.channel[index].ccr = ccr | (1 << STM_DMA_CCR_TCIE);
+ stm_dma.channel[index].cndtr = count;
+ stm_dma.channel[index].cpar = peripheral;
+ stm_dma.channel[index].cmar = memory;
+ ao_dma_config[index].isr = NULL;
+}
+
+void
+ao_dma_set_isr(uint8_t index, void (*isr)(int))
+{
+ ao_dma_config[index].isr = isr;
+}
+
+void
+ao_dma_start(uint8_t index)
+{
+ ao_dma_done[index] = 0;
+ stm_dma.channel[index].ccr |= (1 << STM_DMA_CCR_EN);
+}
+
+void
+ao_dma_done_transfer(uint8_t index)
+{
+ stm_dma.channel[index].ccr &= ~(1 << STM_DMA_CCR_EN);
+ ao_arch_critical(
+ if (--ao_dma_active == 0)
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_DMAEN);
+ );
+ if (ao_dma_allocated[index])
+ ao_dma_mutex[index] = 0;
+ else
+ ao_mutex_put(&ao_dma_mutex[index]);
+}
+
+void
+ao_dma_abort(uint8_t index)
+{
+ stm_dma.channel[index].ccr &= ~(1 << STM_DMA_CCR_EN);
+ ao_wakeup(&ao_dma_done[index]);
+}
+
+void
+ao_dma_alloc(uint8_t index)
+{
+ if (ao_dma_allocated[index])
+ ao_panic(AO_PANIC_DMA);
+ ao_dma_allocated[index] = 1;
+}
+
+#define STM_NUM_DMA_ISR 3
+
+void
+ao_dma_init(void)
+{
+ int isr_id;
+ int index;
+
+ for (isr_id = 0; isr_id < STM_NUM_DMA_ISR; isr_id++) {
+ stm_nvic_set_enable(STM_ISR_DMA_CH1_POS + isr_id);
+ stm_nvic_set_priority(STM_ISR_DMA_CH1_POS + isr_id, 4);
+ }
+ for (index = 0; index < STM_NUM_DMA; index++) {
+ ao_dma_allocated[index] = 0;
+ ao_dma_mutex[index] = 0;
+ }
+}
diff --git a/src/stmf0/ao_flash.h b/src/stmf0/ao_flash.h
new file mode 100644
index 00000000..09ca5ac1
--- /dev/null
+++ b/src/stmf0/ao_flash.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_FLASH_STM_H_
+#define _AO_FLASH_STM_H_
+
+void
+ao_flash_erase_page(uint32_t *page);
+
+void
+ao_flash_page(uint32_t *page, uint32_t *src);
+
+#endif /* _AO_FLASH_STM_H_ */
diff --git a/src/stmf0/ao_flash_loader_stm.c b/src/stmf0/ao_flash_loader_stm.c
new file mode 100644
index 00000000..6bf89234
--- /dev/null
+++ b/src/stmf0/ao_flash_loader_stm.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+#include <ao_exti.h>
+#include <ao_boot.h>
+#include <ao_flash_task.h>
+
+int
+main(void)
+{
+ ao_clock_init();
+
+ ao_usb_init();
+
+#if HAS_TICK
+ ao_timer_init();
+#endif
+
+#ifdef AO_FLASH_LOADER_INIT
+ AO_FLASH_LOADER_INIT;
+#endif
+ ao_flash_task();
+ return 0;
+}
diff --git a/src/stmf0/ao_flash_stm.c b/src/stmf0/ao_flash_stm.c
new file mode 100644
index 00000000..5fe0e619
--- /dev/null
+++ b/src/stmf0/ao_flash_stm.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_flash.h>
+
+static uint8_t
+ao_flash_is_locked(void)
+{
+ return (stm_flash.cr & (1 << STM_FLASH_CR_LOCK)) != 0;
+}
+
+static void
+ao_flash_unlock(void)
+{
+ if (!ao_flash_is_locked())
+ return;
+
+ /* Unlock FLASH_CR register */
+ stm_flash.keyr = STM_FLASH_KEYR_KEY1;
+ stm_flash.keyr = STM_FLASH_KEYR_KEY2;
+ if (ao_flash_is_locked())
+ ao_panic(AO_PANIC_FLASH);
+}
+
+static void
+ao_flash_lock(void)
+{
+ stm_flash.cr |= (1 << STM_FLASH_CR_LOCK);
+}
+
+static void
+ao_flash_wait_bsy(void)
+{
+ while (stm_flash.sr & (1 << STM_FLASH_SR_BSY))
+ ;
+}
+
+static void __attribute__ ((section(".ramtext"),noinline))
+_ao_flash_erase_page(uint32_t *page)
+{
+ stm_flash.cr |= (1 << STM_FLASH_CR_PER);
+
+ stm_flash.ar = (uintptr_t) page;
+
+ stm_flash.cr |= (1 << STM_FLASH_CR_STRT);
+
+ ao_flash_wait_bsy();
+
+ stm_flash.cr &= ~(1 << STM_FLASH_CR_PER);
+}
+
+static uint32_t
+stm_flash_page_size(void)
+{
+ uint16_t dev_id = stm_dev_id();
+
+ switch (dev_id) {
+ case 0x440: /* stm32f05x */
+ case 0x444: /* stm32f03x */
+ case 0x445: /* stm32f04x */
+ return 1024;
+ case 0x442: /* stm32f09x */
+ case 0x448: /* stm32f07x */
+ return 2048;
+ }
+ ao_panic(AO_PANIC_FLASH);
+ return 0;
+}
+
+void
+ao_flash_erase_page(uint32_t *page)
+{
+ /* Erase the whole page at the start. This assumes we'll be flashing things
+ * in memory order
+ */
+
+ if ((uintptr_t) page & (stm_flash_page_size() - 1))
+ return;
+
+ ao_arch_block_interrupts();
+ ao_flash_unlock();
+
+ _ao_flash_erase_page(page);
+
+ ao_flash_lock();
+ ao_arch_release_interrupts();
+}
+
+static void __attribute__ ((section(".ramtext"), noinline))
+_ao_flash_page(uint16_t *dst, uint16_t *src)
+{
+ uint8_t i;
+
+ stm_flash.cr |= (1 << STM_FLASH_CR_PG);
+
+ for (i = 0; i < 128; i++) {
+ *dst++ = *src++;
+ ao_flash_wait_bsy();
+ }
+
+ stm_flash.cr &= ~(1 << STM_FLASH_CR_PG);
+}
+
+void
+ao_flash_page(uint32_t *page, uint32_t *src)
+{
+ ao_flash_erase_page(page);
+
+ ao_arch_block_interrupts();
+ ao_flash_unlock();
+
+ _ao_flash_page((uint16_t *) page, (uint16_t *) src);
+
+ ao_flash_lock();
+ ao_arch_release_interrupts();
+}
diff --git a/src/stmf0/ao_flash_stm_pins.h b/src/stmf0/ao_flash_stm_pins.h
new file mode 100644
index 00000000..ab60b4f3
--- /dev/null
+++ b/src/stmf0/ao_flash_stm_pins.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_FLASH_STM_PINS_H_
+#define _AO_FLASH_STM_PINS_H_
+
+#include <ao_flash_pins.h>
+
+/* 48MHz clock based on USB */
+#define AO_HSI48 1
+
+/* HCLK = 48MHz */
+#define AO_AHB_PRESCALER 1
+#define AO_RCC_CFGR_HPRE_DIV STM_RCC_CFGR_HPRE_DIV_1
+
+/* APB = 48MHz */
+#define AO_APB_PRESCALER 1
+#define AO_RCC_CFGR_PPRE_DIV STM_RCC_CFGR_PPRE_DIV_1
+
+#define HAS_USB 1
+
+#define AO_NEED_HSI 1
+
+#endif /* _AO_FLASH_STM_PINS_H_ */
diff --git a/src/stmf0/ao_interrupt.c b/src/stmf0/ao_interrupt.c
new file mode 100644
index 00000000..c6d8ef34
--- /dev/null
+++ b/src/stmf0/ao_interrupt.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include "stm32f0.h"
+#include <string.h>
+#include <ao_boot.h>
+
+#ifndef IS_FLASH_LOADER
+#error Should define IS_FLASH_LOADER
+#define IS_FLASH_LOADER 0
+#endif
+
+#if !IS_FLASH_LOADER
+#define RELOCATE_INTERRUPT 1
+#endif
+
+extern void main(void);
+extern char __stack__;
+extern char __text_start__, __text_end__;
+extern char __data_start__, __data_end__;
+extern char __bss_start__, __bss_end__;
+#if RELOCATE_INTERRUPT
+extern char __interrupt_rom__, __interrupt_start__, __interrupt_end__;
+#endif
+
+/* Interrupt functions */
+
+void stm_halt_isr(void)
+{
+ ao_panic(AO_PANIC_CRASH);
+}
+
+void stm_ignore_isr(void)
+{
+}
+
+const void *stm_interrupt_vector[];
+
+uint32_t
+stm_flash_size(void) {
+ uint16_t dev_id = stm_dev_id();
+ uint16_t kbytes = 0;
+
+ switch (dev_id) {
+ case 0x445:
+ kbytes = stm_flash_size_04x.f_size;
+ break;
+ }
+ return (uint32_t) kbytes * 1024;
+}
+
+void start(void)
+{
+#ifdef AO_BOOT_CHAIN
+ if (ao_boot_check_chain()) {
+#ifdef AO_BOOT_PIN
+ ao_boot_check_pin();
+#endif
+ }
+#endif
+#if RELOCATE_INTERRUPT
+ /* Turn on syscfg */
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN);
+
+ memcpy(&__interrupt_start__, &__interrupt_rom__, &__interrupt_end__ - &__interrupt_start__);
+ stm_syscfg.cfgr1 = (stm_syscfg.cfgr1 & ~(STM_SYSCFG_CFGR1_MEM_MODE_MASK << STM_SYSCFG_CFGR1_MEM_MODE)) |
+ (STM_SYSCFG_CFGR1_MEM_MODE_SRAM << STM_SYSCFG_CFGR1_MEM_MODE);
+#endif
+ memcpy(&__data_start__, &__text_end__, &__data_end__ - &__data_start__);
+ memset(&__bss_start__, '\0', &__bss_end__ - &__bss_start__);
+ main();
+}
+
+#define STRINGIFY(x) #x
+
+#define isr(name) \
+ void __attribute__ ((weak)) stm_ ## name ## _isr(void); \
+ _Pragma(STRINGIFY(weak stm_ ## name ## _isr = stm_ignore_isr))
+
+#define isr_halt(name) \
+ void __attribute__ ((weak)) stm_ ## name ## _isr(void); \
+ _Pragma(STRINGIFY(weak stm_ ## name ## _isr = stm_halt_isr))
+
+isr(nmi)
+isr_halt(hardfault)
+isr_halt(memmanage)
+isr_halt(busfault)
+isr_halt(usagefault)
+isr(svc)
+isr(debugmon)
+isr(pendsv)
+isr(systick)
+isr(wwdg)
+isr(pvd)
+isr(rtc)
+isr(flash)
+isr(rcc_crs)
+isr(exti0_1)
+isr(exti2_3)
+isr(exti4_15)
+isr(tsc)
+isr(dma_ch1)
+isr(dma_ch2_3)
+isr(dma_ch4_5_6)
+isr(adc_comp)
+isr(tim1_brk_up_trg_com)
+isr(tim1_cc)
+isr(tim2)
+isr(tim3)
+isr(tim6_dac)
+isr(tim7)
+isr(tim14)
+isr(tim15)
+isr(tim16)
+isr(tim17)
+isr(i2c1)
+isr(i2c2)
+isr(spi1)
+isr(spi2)
+isr(usart1)
+isr(usart2)
+isr(usart3_4_5_6_7_8)
+isr(cec_can)
+isr(usb)
+
+#define i(addr,name) [(addr)/4] = stm_ ## name ## _isr
+
+__attribute__ ((section(".interrupt")))
+const void *stm_interrupt_vector[] = {
+ [0] = &__stack__,
+ [1] = start,
+ i(0x08, nmi),
+ i(0x0c, hardfault),
+ i(0x2c, svc),
+ i(0x30, debugmon),
+ i(0x38, pendsv),
+ i(0x3c, systick),
+ i(0x40, wwdg), /* IRQ0 */
+ i(0x44, pvd),
+ i(0x48, rtc),
+ i(0x4c, flash),
+ i(0x50, rcc_crs),
+ i(0x54, exti0_1),
+ i(0x58, exti2_3),
+ i(0x5c, exti4_15),
+ i(0x60, tsc),
+ i(0x64, dma_ch1),
+ i(0x68, dma_ch2_3),
+ i(0x6c, dma_ch4_5_6),
+ i(0x70, adc_comp),
+ i(0x74, tim1_brk_up_trg_com),
+ i(0x78, tim1_cc),
+ i(0x7c, tim2),
+ i(0x80, tim3),
+ i(0x84, tim6_dac),
+ i(0x88, tim7),
+ i(0x8c, tim14),
+ i(0x90, tim15),
+ i(0x94, tim16),
+ i(0x98, tim17),
+ i(0x9c, i2c1),
+ i(0xa0, i2c2),
+ i(0xa4, spi1),
+ i(0xa8, spi2),
+ i(0xac, usart1),
+ i(0xb0, usart2),
+ i(0xb4, usart3_4_5_6_7_8),
+ i(0xb8, cec_can),
+ i(0xbc, usb),
+};
diff --git a/src/stmf0/ao_led.c b/src/stmf0/ao_led.c
new file mode 100644
index 00000000..9b61cf62
--- /dev/null
+++ b/src/stmf0/ao_led.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+__pdata uint16_t ao_led_enable;
+
+void
+ao_led_on(uint16_t colors)
+{
+#ifdef LED_PORT
+ LED_PORT->bsrr = (colors & ao_led_enable);
+#else
+#ifdef LED_PORT_0
+ LED_PORT_0->bsrr = ((colors & ao_led_enable) & LED_PORT_0_MASK) << LED_PORT_0_SHIFT;
+#endif
+#ifdef LED_PORT_1
+ LED_PORT_1->bsrr = ((colors & ao_led_enable) & LED_PORT_1_MASK) << LED_PORT_1_SHIFT;
+#endif
+#endif
+}
+
+void
+ao_led_off(uint16_t colors)
+{
+#ifdef LED_PORT
+ LED_PORT->bsrr = (uint32_t) (colors & ao_led_enable) << 16;
+#else
+#ifdef LED_PORT_0
+ LED_PORT_0->bsrr = ((uint32_t) (colors & ao_led_enable) & LED_PORT_0_MASK) << (LED_PORT_0_SHIFT + 16);
+#endif
+#ifdef LED_PORT_1
+ LED_PORT_1->bsrr = ((uint32_t) (colors & ao_led_enable) & LED_PORT_1_MASK) << (LED_PORT_1_SHIFT + 16);
+#endif
+#endif
+}
+
+void
+ao_led_set(uint16_t colors)
+{
+ uint16_t on = colors & ao_led_enable;
+ uint16_t off = ~colors & ao_led_enable;
+
+ ao_led_off(off);
+ ao_led_on(on);
+}
+
+void
+ao_led_toggle(uint16_t colors)
+{
+#ifdef LED_PORT
+ LED_PORT->odr ^= (colors & ao_led_enable);
+#else
+#ifdef LED_PORT_0
+ LED_PORT_0->odr ^= ((colors & ao_led_enable) & LED_PORT_0_MASK) << LED_PORT_0_SHIFT;
+#endif
+#ifdef LED_PORT_1
+ LED_PORT_1->odr ^= ((colors & ao_led_enable) & LED_PORT_1_MASK) << LED_PORT_1_SHIFT;
+#endif
+#endif
+}
+
+void
+ao_led_for(uint16_t colors, uint16_t ticks) __reentrant
+{
+ ao_led_on(colors);
+ ao_delay(ticks);
+ ao_led_off(colors);
+}
+
+#define init_led_pin(port, bit) do { \
+ stm_moder_set(port, bit, STM_MODER_OUTPUT); \
+ stm_otyper_set(port, bit, STM_OTYPER_PUSH_PULL); \
+ } while (0)
+
+void
+ao_led_init(uint16_t enable)
+{
+ int bit;
+
+ ao_led_enable = enable;
+#ifdef LED_PORT
+ stm_rcc.ahbenr |= (1 << LED_PORT_ENABLE);
+ LED_PORT->odr &= ~enable;
+#else
+#ifdef LED_PORT_0
+ stm_rcc.ahbenr |= (1 << LED_PORT_0_ENABLE);
+ LED_PORT_0->odr &= ~((enable & ao_led_enable) & LED_PORT_0_MASK) << LED_PORT_0_SHIFT;
+#endif
+#ifdef LED_PORT_1
+ stm_rcc.ahbenr |= (1 << LED_PORT_1_ENABLE);
+ LED_PORT_1->odr &= ~((enable & ao_led_enable) & LED_PORT_1_MASK) << LED_PORT_1_SHIFT;
+#endif
+#endif
+ for (bit = 0; bit < 16; bit++) {
+ if (enable & (1 << bit)) {
+#ifdef LED_PORT
+ init_led_pin(LED_PORT, bit);
+#else
+#ifdef LED_PORT_0
+ if (LED_PORT_0_MASK & (1 << bit))
+ init_led_pin(LED_PORT_0, bit + LED_PORT_0_SHIFT);
+#endif
+#ifdef LED_PORT_1
+ if (LED_PORT_1_MASK & (1 << bit))
+ init_led_pin(LED_PORT_1, bit + LED_PORT_1_SHIFT);
+#endif
+#endif
+ }
+ }
+}
diff --git a/src/stmf0/ao_romconfig.c b/src/stmf0/ao_romconfig.c
new file mode 100644
index 00000000..5da15072
--- /dev/null
+++ b/src/stmf0/ao_romconfig.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2011 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+AO_ROMCONFIG_SYMBOL (0) uint16_t ao_romconfig_version = AO_ROMCONFIG_VERSION;
+AO_ROMCONFIG_SYMBOL (0) uint16_t ao_romconfig_check = ~AO_ROMCONFIG_VERSION;
+AO_ROMCONFIG_SYMBOL (0) uint16_t ao_serial_number = 0;
+#ifndef AO_RADIO_CAL_DEFAULT
+#define AO_RADIO_CAL_DEFAULT 0x01020304
+#endif
+AO_ROMCONFIG_SYMBOL (0) uint32_t ao_radio_cal = AO_RADIO_CAL_DEFAULT;
+
diff --git a/src/stmf0/ao_timer.c b/src/stmf0/ao_timer.c
new file mode 100644
index 00000000..3aae7e55
--- /dev/null
+++ b/src/stmf0/ao_timer.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+#include <ao_task.h>
+#if HAS_FAKE_FLIGHT
+#include <ao_fake_flight.h>
+#endif
+
+#ifndef HAS_TICK
+#define HAS_TICK 1
+#endif
+
+#if HAS_TICK
+volatile AO_TICK_TYPE ao_tick_count;
+
+AO_TICK_TYPE
+ao_time(void)
+{
+ return ao_tick_count;
+}
+
+#if AO_DATA_ALL
+volatile __data uint8_t ao_data_interval = 1;
+volatile __data uint8_t ao_data_count;
+#endif
+
+void stm_systick_isr(void)
+{
+ if (stm_systick.csr & (1 << STM_SYSTICK_CSR_COUNTFLAG)) {
+ ++ao_tick_count;
+#if HAS_TASK_QUEUE
+ if (ao_task_alarm_tick && (int16_t) (ao_tick_count - ao_task_alarm_tick) >= 0)
+ ao_task_check_alarm((uint16_t) ao_tick_count);
+#endif
+#if AO_DATA_ALL
+ if (++ao_data_count == ao_data_interval) {
+ ao_data_count = 0;
+#if HAS_FAKE_FLIGHT
+ if (ao_fake_flight_active)
+ ao_fake_flight_poll();
+ else
+#endif
+ ao_adc_poll();
+#if (AO_DATA_ALL & ~(AO_DATA_ADC))
+ ao_wakeup((void *) &ao_data_count);
+#endif
+ }
+#endif
+#ifdef AO_TIMER_HOOK
+ AO_TIMER_HOOK;
+#endif
+ }
+}
+
+#if HAS_ADC
+void
+ao_timer_set_adc_interval(uint8_t interval)
+{
+ ao_arch_critical(
+ ao_data_interval = interval;
+ ao_data_count = 0;
+ );
+}
+#endif
+
+#define SYSTICK_RELOAD (AO_SYSTICK / 100 - 1)
+
+void
+ao_timer_init(void)
+{
+ stm_systick.rvr = SYSTICK_RELOAD;
+ stm_systick.cvr = 0;
+ stm_systick.csr = ((1 << STM_SYSTICK_CSR_ENABLE) |
+ (1 << STM_SYSTICK_CSR_TICKINT) |
+ (STM_SYSTICK_CSR_CLKSOURCE_HCLK_8 << STM_SYSTICK_CSR_CLKSOURCE));
+}
+
+#endif
+
+static void
+ao_clock_enable_crs(void)
+{
+ /* Enable crs interface clock */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_CRSEN);
+
+ /* Disable error counter */
+ stm_crs.cr = ((stm_crs.cr & (1 << 4)) |
+ (32 << STM_CRS_CR_TRIM) |
+ (0 << STM_CRS_CR_SWSYNC) |
+ (0 << STM_CRS_CR_AUTOTRIMEN) |
+ (0 << STM_CRS_CR_CEN) |
+ (0 << STM_CRS_CR_ESYNCIE) |
+ (0 << STM_CRS_CR_ERRIE) |
+ (0 << STM_CRS_CR_SYNCWARNIE) |
+ (0 << STM_CRS_CR_SYNCOKIE));
+
+ /* Configure for USB source */
+ stm_crs.cfgr = ((stm_crs.cfgr & ((1 << 30) | (1 << 27))) |
+ (0 << STM_CRS_CFGR_SYNCPOL) |
+ (STM_CRS_CFGR_SYNCSRC_USB << STM_CRS_CFGR_SYNCSRC) |
+ (STM_CRS_CFGR_SYNCDIV_1 << STM_CRS_CFGR_SYNCDIV) |
+ (0x22 << STM_CRS_CFGR_FELIM) |
+ (((48000000 / 1000) - 1) << STM_CRS_CFGR_RELOAD));
+
+ /* Enable error counter, set auto trim */
+ stm_crs.cr = ((stm_crs.cr & (1 << 4)) |
+ (32 << STM_CRS_CR_TRIM) |
+ (0 << STM_CRS_CR_SWSYNC) |
+ (1 << STM_CRS_CR_AUTOTRIMEN) |
+ (1 << STM_CRS_CR_CEN) |
+ (0 << STM_CRS_CR_ESYNCIE) |
+ (0 << STM_CRS_CR_ERRIE) |
+ (0 << STM_CRS_CR_SYNCWARNIE) |
+ (0 << STM_CRS_CR_SYNCOKIE));
+
+}
+
+void
+ao_clock_init(void)
+{
+ uint32_t cfgr;
+
+ /* Switch to HSI while messing about */
+ stm_rcc.cr |= (1 << STM_RCC_CR_HSION);
+ while (!(stm_rcc.cr & (1 << STM_RCC_CR_HSIRDY)))
+ ao_arch_nop();
+
+ stm_rcc.cfgr = (stm_rcc.cfgr & ~(STM_RCC_CFGR_SW_MASK << STM_RCC_CFGR_SW)) |
+ (STM_RCC_CFGR_SW_HSI << STM_RCC_CFGR_SW);
+
+ /* wait for system to switch to HSI */
+ while ((stm_rcc.cfgr & (STM_RCC_CFGR_SWS_MASK << STM_RCC_CFGR_SWS)) !=
+ (STM_RCC_CFGR_SWS_HSI << STM_RCC_CFGR_SWS))
+ ao_arch_nop();
+
+ /* reset the clock config, leaving us running on the HSI */
+ stm_rcc.cfgr &= (uint32_t)0x0000000f;
+
+ /* reset PLLON, CSSON, HSEBYP, HSEON */
+ stm_rcc.cr &= 0x0000ffff;
+
+ /* Disable all interrupts */
+ stm_rcc.cir = 0;
+
+#if AO_HSE
+#define STM_RCC_CFGR_SWS_TARGET_CLOCK STM_RCC_CFGR_SWS_HSE
+#define STM_RCC_CFGR_SW_TARGET_CLOCK STM_RCC_CFGR_SW_HSE
+#define STM_PLLSRC AO_HSE
+#define STM_RCC_CFGR_PLLSRC_TARGET_CLOCK 1
+
+#if AO_HSE_BYPASS
+ stm_rcc.cr |= (1 << STM_RCC_CR_HSEBYP);
+#else
+ stm_rcc.cr &= ~(1 << STM_RCC_CR_HSEBYP);
+#endif
+ /* Enable HSE clock */
+ stm_rcc.cr |= (1 << STM_RCC_CR_HSEON);
+ while (!(stm_rcc.cr & (1 << STM_RCC_CR_HSERDY)))
+ asm("nop");
+#endif
+
+
+#if AO_HSI48
+#define STM_RCC_CFGR_SWS_TARGET_CLOCK STM_RCC_CFGR_SWS_HSI48
+#define STM_RCC_CFGR_SW_TARGET_CLOCK STM_RCC_CFGR_SW_HSI48
+
+ /* Turn HSI48 clock on */
+ stm_rcc.cr2 |= (1 << STM_RCC_CR2_HSI48ON);
+
+ /* Wait for clock to stabilize */
+ while ((stm_rcc.cr2 & (1 << STM_RCC_CR2_HSI48RDY)) == 0)
+ ao_arch_nop();
+
+ ao_clock_enable_crs();
+#endif
+
+#ifndef STM_RCC_CFGR_SWS_TARGET_CLOCK
+#define STM_HSI 16000000
+#define STM_RCC_CFGR_SWS_TARGET_CLOCK STM_RCC_CFGR_SWS_HSI
+#define STM_RCC_CFGR_SW_TARGET_CLOCK STM_RCC_CFGR_SW_HSI
+#define STM_PLLSRC STM_HSI
+#define STM_RCC_CFGR_PLLSRC_TARGET_CLOCK 0
+#endif
+
+#ifdef STM_PLLSRC
+#error No code for PLL initialization yet
+#endif
+
+ /* Set flash latency to tolerate 48MHz SYSCLK -> 1 wait state */
+
+ /* Enable prefetch */
+ stm_flash.acr |= (1 << STM_FLASH_ACR_PRFTBE);
+
+ /* Enable 1 wait state so the CPU can run at 48MHz */
+ stm_flash.acr |= (STM_FLASH_ACR_LATENCY_1 << STM_FLASH_ACR_LATENCY);
+
+ /* Enable power interface clock */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
+
+ /* HCLK to 48MHz -> AHB prescaler = /1 */
+ cfgr = stm_rcc.cfgr;
+ cfgr &= ~(STM_RCC_CFGR_HPRE_MASK << STM_RCC_CFGR_HPRE);
+ cfgr |= (AO_RCC_CFGR_HPRE_DIV << STM_RCC_CFGR_HPRE);
+ stm_rcc.cfgr = cfgr;
+ while ((stm_rcc.cfgr & (STM_RCC_CFGR_HPRE_MASK << STM_RCC_CFGR_HPRE)) !=
+ (AO_RCC_CFGR_HPRE_DIV << STM_RCC_CFGR_HPRE))
+ ao_arch_nop();
+
+ /* APB Prescaler = AO_APB_PRESCALER */
+ cfgr = stm_rcc.cfgr;
+ cfgr &= ~(STM_RCC_CFGR_PPRE_MASK << STM_RCC_CFGR_PPRE);
+ cfgr |= (AO_RCC_CFGR_PPRE_DIV << STM_RCC_CFGR_PPRE);
+ stm_rcc.cfgr = cfgr;
+
+ /* Switch to the desired system clock */
+
+ cfgr = stm_rcc.cfgr;
+ cfgr &= ~(STM_RCC_CFGR_SW_MASK << STM_RCC_CFGR_SW);
+ cfgr |= (STM_RCC_CFGR_SW_TARGET_CLOCK << STM_RCC_CFGR_SW);
+ stm_rcc.cfgr = cfgr;
+ for (;;) {
+ uint32_t c, part, mask, val;
+
+ c = stm_rcc.cfgr;
+ mask = (STM_RCC_CFGR_SWS_MASK << STM_RCC_CFGR_SWS);
+ val = (STM_RCC_CFGR_SWS_TARGET_CLOCK << STM_RCC_CFGR_SWS);
+ part = c & mask;
+ if (part == val)
+ break;
+ }
+
+ /* Clear reset flags */
+ stm_rcc.csr |= (1 << STM_RCC_CSR_RMVF);
+
+#if !AO_HSI && !AO_NEED_HSI
+ /* Turn off the HSI clock */
+ stm_rcc.cr &= ~(1 << STM_RCC_CR_HSION);
+#endif
+#if DEBUG_THE_CLOCK
+ /* Output SYSCLK on PA8 for measurments */
+
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN);
+
+ stm_afr_set(&stm_gpioa, 8, STM_AFR_AF0);
+ stm_moder_set(&stm_gpioa, 8, STM_MODER_ALTERNATE);
+ stm_ospeedr_set(&stm_gpioa, 8, STM_OSPEEDR_40MHz);
+
+ stm_rcc.cfgr |= (STM_RCC_CFGR_MCOPRE_DIV_1 << STM_RCC_CFGR_MCOPRE);
+ stm_rcc.cfgr |= (STM_RCC_CFGR_MCOSEL_HSE << STM_RCC_CFGR_MCOSEL);
+#endif
+}
diff --git a/src/stmf0/ao_usb_stm.c b/src/stmf0/ao_usb_stm.c
new file mode 100644
index 00000000..3ea7da5e
--- /dev/null
+++ b/src/stmf0/ao_usb_stm.c
@@ -0,0 +1,1150 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+#include "ao_usb.h"
+#include "ao_product.h"
+
+#define USB_DEBUG 0
+#define USB_DEBUG_DATA 0
+#define USB_ECHO 0
+
+#ifndef AO_PA11_PA12_RMP
+#error "must define AO_PA11_PA12_RMP"
+#endif
+
+#ifndef USE_USB_STDIO
+#define USE_USB_STDIO 1
+#endif
+
+#if USE_USB_STDIO
+#define AO_USB_OUT_SLEEP_ADDR (&ao_stdin_ready)
+#else
+#define AO_USB_OUT_SLEEP_ADDR (&ao_usb_out_avail)
+#endif
+
+#if USB_DEBUG
+#define debug(format, args...) printf(format, ## args);
+#else
+#define debug(format, args...)
+#endif
+
+#if USB_DEBUG_DATA
+#define debug_data(format, args...) printf(format, ## args);
+#else
+#define debug_data(format, args...)
+#endif
+
+struct ao_usb_setup {
+ uint8_t dir_type_recip;
+ uint8_t request;
+ uint16_t value;
+ uint16_t index;
+ uint16_t length;
+} ao_usb_setup;
+
+static uint8_t ao_usb_ep0_state;
+
+/* Pending EP0 IN data */
+static const uint8_t *ao_usb_ep0_in_data; /* Remaining data */
+static uint8_t ao_usb_ep0_in_len; /* Remaining amount */
+
+/* Temp buffer for smaller EP0 in data */
+static uint8_t ao_usb_ep0_in_buf[2];
+
+/* Pending EP0 OUT data */
+static uint8_t *ao_usb_ep0_out_data;
+static uint8_t ao_usb_ep0_out_len;
+
+/*
+ * Objects allocated in special USB memory
+ */
+
+/* Buffer description tables */
+static union stm_usb_bdt *ao_usb_bdt;
+/* USB address of end of allocated storage */
+static uint16_t ao_usb_sram_addr;
+
+/* Pointer to ep0 tx/rx buffers in USB memory */
+static uint16_t *ao_usb_ep0_tx_buffer;
+static uint16_t *ao_usb_ep0_rx_buffer;
+
+/* Pointer to bulk data tx/rx buffers in USB memory */
+static uint16_t ao_usb_in_tx_offset;
+static uint16_t *ao_usb_in_tx_buffer;
+static uint16_t *ao_usb_out_rx_buffer;
+
+/* System ram shadow of USB buffer; writing individual bytes is
+ * too much of a pain (sigh) */
+static uint8_t ao_usb_tx_buffer[AO_USB_IN_SIZE];
+static uint8_t ao_usb_tx_count;
+
+static uint8_t ao_usb_rx_buffer[AO_USB_OUT_SIZE];
+static uint8_t ao_usb_rx_count, ao_usb_rx_pos;
+
+/*
+ * End point register indices
+ */
+
+#define AO_USB_CONTROL_EPR 0
+#define AO_USB_INT_EPR 1
+#define AO_USB_OUT_EPR 2
+#define AO_USB_IN_EPR 3
+
+/* Marks when we don't need to send an IN packet.
+ * This happens only when the last IN packet is not full,
+ * otherwise the host will expect to keep seeing packets.
+ * Send a zero-length packet as required
+ */
+static uint8_t ao_usb_in_flushed;
+
+/* Marks when we have delivered an IN packet to the hardware
+ * and it has not been received yet. ao_sleep on this address
+ * to wait for it to be delivered.
+ */
+static uint8_t ao_usb_in_pending;
+
+/* Marks when an OUT packet has been received by the hardware
+ * but not pulled to the shadow buffer.
+ */
+static uint8_t ao_usb_out_avail;
+uint8_t ao_usb_running;
+static uint8_t ao_usb_configuration;
+
+#define AO_USB_EP0_GOT_RESET 1
+#define AO_USB_EP0_GOT_SETUP 2
+#define AO_USB_EP0_GOT_RX_DATA 4
+#define AO_USB_EP0_GOT_TX_ACK 8
+
+static uint8_t ao_usb_ep0_receive;
+static uint8_t ao_usb_address;
+static uint8_t ao_usb_address_pending;
+
+static inline uint32_t set_toggle(uint32_t current_value,
+ uint32_t mask,
+ uint32_t desired_value)
+{
+ return (current_value ^ desired_value) & mask;
+}
+
+static inline uint16_t *ao_usb_packet_buffer_addr(uint16_t sram_addr)
+{
+ return (uint16_t *) (stm_usb_sram + sram_addr);
+}
+
+#if AO_USB_DIRECTIO
+static inline uint16_t ao_usb_packet_buffer_offset(uint16_t *addr)
+{
+ return (uint16_t) ((uint8_t *) addr - stm_usb_sram);
+}
+#endif
+
+static inline uint32_t ao_usb_epr_stat_rx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_STAT_RX) & STM_USB_EPR_STAT_RX_MASK;
+}
+
+static inline uint32_t ao_usb_epr_stat_tx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_STAT_TX) & STM_USB_EPR_STAT_TX_MASK;
+}
+
+static inline uint32_t ao_usb_epr_ctr_rx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_CTR_RX) & 1;
+}
+
+static inline uint32_t ao_usb_epr_ctr_tx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_CTR_TX) & 1;
+}
+
+static inline uint32_t ao_usb_epr_setup(uint32_t epr) {
+ return (epr >> STM_USB_EPR_SETUP) & 1;
+}
+
+static inline uint32_t ao_usb_epr_dtog_rx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_DTOG_RX) & 1;
+}
+
+static inline uint32_t ao_usb_epr_dtog_tx(uint32_t epr) {
+ return (epr >> STM_USB_EPR_DTOG_TX) & 1;
+}
+
+/*
+ * Set current device address and mark the
+ * interface as active
+ */
+void
+ao_usb_set_address(uint8_t address)
+{
+ debug("ao_usb_set_address %02x\n", address);
+ stm_usb.daddr = (1 << STM_USB_DADDR_EF) | address;
+ ao_usb_address_pending = 0;
+}
+
+/*
+ * Write these values to preserve register contents under HW changes
+ */
+
+#define STM_USB_EPR_INVARIANT ((1 << STM_USB_EPR_CTR_RX) | \
+ (STM_USB_EPR_DTOG_RX_WRITE_INVARIANT << STM_USB_EPR_DTOG_RX) | \
+ (STM_USB_EPR_STAT_RX_WRITE_INVARIANT << STM_USB_EPR_STAT_RX) | \
+ (1 << STM_USB_EPR_CTR_TX) | \
+ (STM_USB_EPR_DTOG_TX_WRITE_INVARIANT << STM_USB_EPR_DTOG_TX) | \
+ (STM_USB_EPR_STAT_TX_WRITE_INVARIANT << STM_USB_EPR_STAT_TX))
+
+#define STM_USB_EPR_INVARIANT_MASK ((1 << STM_USB_EPR_CTR_RX) | \
+ (STM_USB_EPR_DTOG_RX_MASK << STM_USB_EPR_DTOG_RX) | \
+ (STM_USB_EPR_STAT_RX_MASK << STM_USB_EPR_STAT_RX) | \
+ (1 << STM_USB_EPR_CTR_TX) | \
+ (STM_USB_EPR_DTOG_TX_MASK << STM_USB_EPR_DTOG_TX) | \
+ (STM_USB_EPR_STAT_TX_MASK << STM_USB_EPR_STAT_TX))
+
+/*
+ * These bits are purely under sw control, so preserve them in the
+ * register by re-writing what was read
+ */
+#define STM_USB_EPR_PRESERVE_MASK ((STM_USB_EPR_EP_TYPE_MASK << STM_USB_EPR_EP_TYPE) | \
+ (1 << STM_USB_EPR_EP_KIND) | \
+ (STM_USB_EPR_EA_MASK << STM_USB_EPR_EA))
+
+#define TX_DBG 0
+#define RX_DBG 0
+
+#if TX_DBG
+#define _tx_dbg0(msg) _dbg(__LINE__,msg,0)
+#define _tx_dbg1(msg,value) _dbg(__LINE__,msg,value)
+#else
+#define _tx_dbg0(msg)
+#define _tx_dbg1(msg,value)
+#endif
+
+#if RX_DBG
+#define _rx_dbg0(msg) _dbg(__LINE__,msg,0)
+#define _rx_dbg1(msg,value) _dbg(__LINE__,msg,value)
+#else
+#define _rx_dbg0(msg)
+#define _rx_dbg1(msg,value)
+#endif
+
+#if TX_DBG || RX_DBG
+static void _dbg(int line, char *msg, uint32_t value);
+#endif
+
+/*
+ * Set the state of the specified endpoint register to a new
+ * value. This is tricky because the bits toggle where the new
+ * value is one, and we need to write invariant values in other
+ * spots of the register. This hardware is strange...
+ */
+static void
+_ao_usb_set_stat_tx(int ep, uint32_t stat_tx)
+{
+ uint16_t epr_write, epr_old;
+
+ _tx_dbg1("set_stat_tx top", stat_tx);
+ epr_old = epr_write = stm_usb.epr[ep].r;
+ epr_write &= STM_USB_EPR_PRESERVE_MASK;
+ epr_write |= STM_USB_EPR_INVARIANT;
+ epr_write |= set_toggle(epr_old,
+ STM_USB_EPR_STAT_TX_MASK << STM_USB_EPR_STAT_TX,
+ stat_tx << STM_USB_EPR_STAT_TX);
+ stm_usb.epr[ep].r = epr_write;
+ _tx_dbg1("set_stat_tx bottom", epr_write);
+}
+
+static void
+ao_usb_set_stat_tx(int ep, uint32_t stat_tx)
+{
+ ao_arch_block_interrupts();
+ _ao_usb_set_stat_tx(ep, stat_tx);
+ ao_arch_release_interrupts();
+}
+
+static void
+_ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
+ uint16_t epr_write, epr_old;
+
+ epr_write = epr_old = stm_usb.epr[ep].r;
+ epr_write &= STM_USB_EPR_PRESERVE_MASK;
+ epr_write |= STM_USB_EPR_INVARIANT;
+ epr_write |= set_toggle(epr_old,
+ STM_USB_EPR_STAT_RX_MASK << STM_USB_EPR_STAT_RX,
+ stat_rx << STM_USB_EPR_STAT_RX);
+ stm_usb.epr[ep].r = epr_write;
+}
+
+static void
+ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
+ ao_arch_block_interrupts();
+ _ao_usb_set_stat_rx(ep, stat_rx);
+ ao_arch_release_interrupts();
+}
+
+/*
+ * Set just endpoint 0, for use during startup
+ */
+
+static void
+ao_usb_init_ep(uint8_t ep, uint32_t addr, uint32_t type, uint32_t stat_rx, uint32_t stat_tx)
+{
+ uint16_t epr;
+
+ ao_arch_block_interrupts();
+ epr = stm_usb.epr[ep].r;
+ epr = ((0 << STM_USB_EPR_CTR_RX) |
+ (epr & (1 << STM_USB_EPR_DTOG_RX)) |
+ set_toggle(epr,
+ (STM_USB_EPR_STAT_RX_MASK << STM_USB_EPR_STAT_RX),
+ (stat_rx << STM_USB_EPR_STAT_RX)) |
+ (type << STM_USB_EPR_EP_TYPE) |
+ (0 << STM_USB_EPR_EP_KIND) |
+ (0 << STM_USB_EPR_CTR_TX) |
+ (epr & (1 << STM_USB_EPR_DTOG_TX)) |
+ set_toggle(epr,
+ (STM_USB_EPR_STAT_TX_MASK << STM_USB_EPR_STAT_TX),
+ (stat_tx << STM_USB_EPR_STAT_TX)) |
+ (addr << STM_USB_EPR_EA));
+ stm_usb.epr[ep].r = epr;
+ ao_arch_release_interrupts();
+ debug ("writing epr[%d] 0x%04x wrote 0x%04x\n",
+ ep, epr, stm_usb.epr[ep].r);
+}
+
+static void
+ao_usb_init_btable(void)
+{
+ ao_usb_sram_addr = 0;
+
+ ao_usb_bdt = (void *) stm_usb_sram;
+
+ ao_usb_sram_addr += 8 * STM_USB_BDT_SIZE;
+
+ /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */
+
+ ao_usb_bdt[0].single.addr_tx = ao_usb_sram_addr;
+ ao_usb_bdt[0].single.count_tx = 0;
+ ao_usb_ep0_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
+
+ ao_usb_bdt[0].single.addr_rx = ao_usb_sram_addr;
+ ao_usb_bdt[0].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
+ (((AO_USB_CONTROL_SIZE / 32) - 1) << STM_USB_BDT_COUNT_RX_NUM_BLOCK));
+ ao_usb_ep0_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
+
+}
+
+static void
+ao_usb_set_ep0(void)
+{
+ int e;
+
+ ao_usb_init_btable();
+
+ /* buffer table is at the start of USB memory */
+ stm_usb.btable = 0;
+
+ ao_usb_init_ep(AO_USB_CONTROL_EPR, AO_USB_CONTROL_EP,
+ STM_USB_EPR_EP_TYPE_CONTROL,
+ STM_USB_EPR_STAT_RX_VALID,
+ STM_USB_EPR_STAT_TX_NAK);
+
+ /* Clear all of the other endpoints */
+ for (e = 1; e < 8; e++) {
+ ao_usb_init_ep(e, 0,
+ STM_USB_EPR_EP_TYPE_CONTROL,
+ STM_USB_EPR_STAT_RX_DISABLED,
+ STM_USB_EPR_STAT_TX_DISABLED);
+ }
+
+ ao_usb_set_address(0);
+}
+
+static void
+ao_usb_set_configuration(void)
+{
+ debug ("ao_usb_set_configuration\n");
+
+ /* Set up the INT end point */
+ ao_usb_bdt[AO_USB_INT_EPR].single.addr_tx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_INT_EPR].single.count_tx = 0;
+ ao_usb_sram_addr += AO_USB_INT_SIZE;
+
+ ao_usb_init_ep(AO_USB_INT_EPR,
+ AO_USB_INT_EP,
+ STM_USB_EPR_EP_TYPE_INTERRUPT,
+ STM_USB_EPR_STAT_RX_DISABLED,
+ STM_USB_EPR_STAT_TX_NAK);
+
+ /* Set up the OUT end point */
+ ao_usb_bdt[AO_USB_OUT_EPR].single.addr_rx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
+ (((AO_USB_OUT_SIZE / 32) - 1) << STM_USB_BDT_COUNT_RX_NUM_BLOCK));
+ ao_usb_out_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_sram_addr += AO_USB_OUT_SIZE;
+
+ ao_usb_init_ep(AO_USB_OUT_EPR,
+ AO_USB_OUT_EP,
+ STM_USB_EPR_EP_TYPE_BULK,
+ STM_USB_EPR_STAT_RX_VALID,
+ STM_USB_EPR_STAT_TX_DISABLED);
+
+ /* Set up the IN end point */
+ ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = 0;
+ ao_usb_in_tx_offset = ao_usb_sram_addr;
+ ao_usb_in_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_in_tx_offset);
+ ao_usb_sram_addr += AO_USB_IN_SIZE;
+
+ ao_usb_init_ep(AO_USB_IN_EPR,
+ AO_USB_IN_EP,
+ STM_USB_EPR_EP_TYPE_BULK,
+ STM_USB_EPR_STAT_RX_DISABLED,
+ STM_USB_EPR_STAT_TX_NAK);
+
+ ao_usb_running = 1;
+}
+
+static uint16_t control_count;
+static uint16_t int_count;
+static uint16_t in_count;
+static uint16_t out_count;
+static uint16_t reset_count;
+
+/* The USB memory must be accessed in 16-bit units
+ */
+
+static void
+ao_usb_copy_tx(const uint8_t *src, uint16_t *base, uint16_t bytes)
+{
+ while (bytes >= 2) {
+ *base++ = src[0] | (src[1] << 8);
+ src += 2;
+ bytes -= 2;
+ }
+ if (bytes)
+ *base = *src;
+}
+
+static void
+ao_usb_copy_rx(uint8_t *dst, uint16_t *base, uint16_t bytes)
+{
+ while (bytes >= 2) {
+ uint16_t s = *base++;
+ dst[0] = s;
+ dst[1] = s >> 8;
+ dst += 2;
+ bytes -= 2;
+ }
+ if (bytes)
+ *dst = *base;
+}
+
+/* Send an IN data packet */
+static void
+ao_usb_ep0_flush(void)
+{
+ uint8_t this_len;
+
+ /* Check to see if the endpoint is still busy */
+ if (ao_usb_epr_stat_tx(stm_usb.epr[0].r) == STM_USB_EPR_STAT_TX_VALID) {
+ debug("EP0 not accepting IN data\n");
+ return;
+ }
+
+ this_len = ao_usb_ep0_in_len;
+ if (this_len > AO_USB_CONTROL_SIZE)
+ this_len = AO_USB_CONTROL_SIZE;
+
+ if (this_len < AO_USB_CONTROL_SIZE)
+ ao_usb_ep0_state = AO_USB_EP0_IDLE;
+
+ ao_usb_ep0_in_len -= this_len;
+
+ debug_data ("Flush EP0 len %d:", this_len);
+ ao_usb_copy_tx(ao_usb_ep0_in_data, ao_usb_ep0_tx_buffer, this_len);
+ debug_data ("\n");
+ ao_usb_ep0_in_data += this_len;
+
+ /* Mark the endpoint as TX valid to send the packet */
+ ao_usb_bdt[AO_USB_CONTROL_EPR].single.count_tx = this_len;
+ ao_usb_set_stat_tx(AO_USB_CONTROL_EPR, STM_USB_EPR_STAT_TX_VALID);
+ debug ("queue tx. epr 0 now %08x\n", stm_usb.epr[AO_USB_CONTROL_EPR]);
+}
+
+/* Read data from the ep0 OUT fifo */
+static void
+ao_usb_ep0_fill(void)
+{
+ uint16_t len = ao_usb_bdt[0].single.count_rx & STM_USB_BDT_COUNT_RX_COUNT_RX_MASK;
+
+ if (len > ao_usb_ep0_out_len)
+ len = ao_usb_ep0_out_len;
+ ao_usb_ep0_out_len -= len;
+
+ /* Pull all of the data out of the packet */
+ debug_data ("Fill EP0 len %d:", len);
+ ao_usb_copy_rx(ao_usb_ep0_out_data, ao_usb_ep0_rx_buffer, len);
+ debug_data ("\n");
+ ao_usb_ep0_out_data += len;
+
+ /* ACK the packet */
+ ao_usb_set_stat_rx(0, STM_USB_EPR_STAT_RX_VALID);
+}
+
+static void
+ao_usb_ep0_in_reset(void)
+{
+ ao_usb_ep0_in_data = ao_usb_ep0_in_buf;
+ ao_usb_ep0_in_len = 0;
+}
+
+static void
+ao_usb_ep0_in_queue_byte(uint8_t a)
+{
+ if (ao_usb_ep0_in_len < sizeof (ao_usb_ep0_in_buf))
+ ao_usb_ep0_in_buf[ao_usb_ep0_in_len++] = a;
+}
+
+static void
+ao_usb_ep0_in_set(const uint8_t *data, uint8_t len)
+{
+ ao_usb_ep0_in_data = data;
+ ao_usb_ep0_in_len = len;
+}
+
+static void
+ao_usb_ep0_out_set(uint8_t *data, uint8_t len)
+{
+ ao_usb_ep0_out_data = data;
+ ao_usb_ep0_out_len = len;
+}
+
+static void
+ao_usb_ep0_in_start(uint16_t max)
+{
+ /* Don't send more than asked for */
+ if (ao_usb_ep0_in_len > max)
+ ao_usb_ep0_in_len = max;
+ ao_usb_ep0_flush();
+}
+
+static struct ao_usb_line_coding ao_usb_line_coding = {115200, 0, 0, 8};
+
+/* Walk through the list of descriptors and find a match
+ */
+static void
+ao_usb_get_descriptor(uint16_t value)
+{
+ const uint8_t *descriptor;
+ uint8_t type = value >> 8;
+ uint8_t index = value;
+
+ descriptor = ao_usb_descriptors;
+ while (descriptor[0] != 0) {
+ if (descriptor[1] == type && index-- == 0) {
+ uint8_t len;
+ if (type == AO_USB_DESC_CONFIGURATION)
+ len = descriptor[2];
+ else
+ len = descriptor[0];
+ ao_usb_ep0_in_set(descriptor, len);
+ break;
+ }
+ descriptor += descriptor[0];
+ }
+}
+
+static void
+ao_usb_ep0_setup(void)
+{
+ /* Pull the setup packet out of the fifo */
+ ao_usb_ep0_out_set((uint8_t *) &ao_usb_setup, 8);
+ ao_usb_ep0_fill();
+ if (ao_usb_ep0_out_len != 0) {
+ debug ("invalid setup packet length\n");
+ return;
+ }
+
+ if ((ao_usb_setup.dir_type_recip & AO_USB_DIR_IN) || ao_usb_setup.length == 0)
+ ao_usb_ep0_state = AO_USB_EP0_DATA_IN;
+ else
+ ao_usb_ep0_state = AO_USB_EP0_DATA_OUT;
+
+ ao_usb_ep0_in_reset();
+
+ switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_TYPE_MASK) {
+ case AO_USB_TYPE_STANDARD:
+ debug ("Standard setup packet\n");
+ switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_RECIP_MASK) {
+ case AO_USB_RECIP_DEVICE:
+ debug ("Device setup packet\n");
+ switch(ao_usb_setup.request) {
+ case AO_USB_REQ_GET_STATUS:
+ debug ("get status\n");
+ ao_usb_ep0_in_queue_byte(0);
+ ao_usb_ep0_in_queue_byte(0);
+ break;
+ case AO_USB_REQ_SET_ADDRESS:
+ debug ("set address %d\n", ao_usb_setup.value);
+ ao_usb_address = ao_usb_setup.value;
+ ao_usb_address_pending = 1;
+ break;
+ case AO_USB_REQ_GET_DESCRIPTOR:
+ debug ("get descriptor %d\n", ao_usb_setup.value);
+ ao_usb_get_descriptor(ao_usb_setup.value);
+ break;
+ case AO_USB_REQ_GET_CONFIGURATION:
+ debug ("get configuration %d\n", ao_usb_configuration);
+ ao_usb_ep0_in_queue_byte(ao_usb_configuration);
+ break;
+ case AO_USB_REQ_SET_CONFIGURATION:
+ ao_usb_configuration = ao_usb_setup.value;
+ debug ("set configuration %d\n", ao_usb_configuration);
+ ao_usb_set_configuration();
+ break;
+ }
+ break;
+ case AO_USB_RECIP_INTERFACE:
+ debug ("Interface setup packet\n");
+ switch(ao_usb_setup.request) {
+ case AO_USB_REQ_GET_STATUS:
+ ao_usb_ep0_in_queue_byte(0);
+ ao_usb_ep0_in_queue_byte(0);
+ break;
+ case AO_USB_REQ_GET_INTERFACE:
+ ao_usb_ep0_in_queue_byte(0);
+ break;
+ case AO_USB_REQ_SET_INTERFACE:
+ break;
+ }
+ break;
+ case AO_USB_RECIP_ENDPOINT:
+ debug ("Endpoint setup packet\n");
+ switch(ao_usb_setup.request) {
+ case AO_USB_REQ_GET_STATUS:
+ ao_usb_ep0_in_queue_byte(0);
+ ao_usb_ep0_in_queue_byte(0);
+ break;
+ }
+ break;
+ }
+ break;
+ case AO_USB_TYPE_CLASS:
+ debug ("Class setup packet\n");
+ switch (ao_usb_setup.request) {
+ case AO_USB_SET_LINE_CODING:
+ debug ("set line coding\n");
+ ao_usb_ep0_out_set((uint8_t *) &ao_usb_line_coding, 7);
+ break;
+ case AO_USB_GET_LINE_CODING:
+ debug ("get line coding\n");
+ ao_usb_ep0_in_set((const uint8_t *) &ao_usb_line_coding, 7);
+ break;
+ case AO_USB_SET_CONTROL_LINE_STATE:
+ break;
+ }
+ break;
+ }
+
+ /* If we're not waiting to receive data from the host,
+ * queue an IN response
+ */
+ if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN)
+ ao_usb_ep0_in_start(ao_usb_setup.length);
+}
+
+static void
+ao_usb_ep0_handle(uint8_t receive)
+{
+ ao_usb_ep0_receive = 0;
+ if (receive & AO_USB_EP0_GOT_RESET) {
+ debug ("\treset\n");
+ ao_usb_set_ep0();
+ return;
+ }
+ if (receive & AO_USB_EP0_GOT_SETUP) {
+ debug ("\tsetup\n");
+ ao_usb_ep0_setup();
+ }
+ if (receive & AO_USB_EP0_GOT_RX_DATA) {
+ debug ("\tgot rx data\n");
+ if (ao_usb_ep0_state == AO_USB_EP0_DATA_OUT) {
+ ao_usb_ep0_fill();
+ if (ao_usb_ep0_out_len == 0) {
+ ao_usb_ep0_state = AO_USB_EP0_DATA_IN;
+ ao_usb_ep0_in_start(0);
+ }
+ }
+ }
+ if (receive & AO_USB_EP0_GOT_TX_ACK) {
+ debug ("\tgot tx ack\n");
+
+#if HAS_FLIGHT && AO_USB_FORCE_IDLE
+ ao_flight_force_idle = 1;
+#endif
+ /* Wait until the IN packet is received from addr 0
+ * before assigning our local address
+ */
+ if (ao_usb_address_pending)
+ ao_usb_set_address(ao_usb_address);
+ if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN)
+ ao_usb_ep0_flush();
+ }
+}
+
+void
+stm_usb_isr(void)
+{
+ uint32_t istr = stm_usb.istr;
+
+ stm_usb.istr = ~istr;
+ if (istr & (1 << STM_USB_ISTR_CTR)) {
+ uint8_t ep = istr & STM_USB_ISTR_EP_ID_MASK;
+ uint16_t epr, epr_write;
+
+ /* Preserve the SW write bits, don't mess with most HW writable bits,
+ * clear the CTR_RX and CTR_TX bits
+ */
+ epr = stm_usb.epr[ep].r;
+ epr_write = epr;
+ epr_write &= STM_USB_EPR_PRESERVE_MASK;
+ epr_write |= STM_USB_EPR_INVARIANT;
+ epr_write &= ~(1 << STM_USB_EPR_CTR_RX);
+ epr_write &= ~(1 << STM_USB_EPR_CTR_TX);
+ stm_usb.epr[ep].r = epr_write;
+
+ switch (ep) {
+ case 0:
+ ++control_count;
+ if (ao_usb_epr_ctr_rx(epr)) {
+ if (ao_usb_epr_setup(epr))
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_SETUP;
+ else
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_RX_DATA;
+ }
+ if (ao_usb_epr_ctr_tx(epr))
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_TX_ACK;
+ ao_usb_ep0_handle(ao_usb_ep0_receive);
+ break;
+ case AO_USB_OUT_EPR:
+ ++out_count;
+ if (ao_usb_epr_ctr_rx(epr)) {
+ _rx_dbg1("RX ISR", epr);
+ ao_usb_out_avail = 1;
+ _rx_dbg0("out avail set");
+ ao_wakeup(AO_USB_OUT_SLEEP_ADDR);
+ _rx_dbg0("stdin awoken");
+ }
+ break;
+ case AO_USB_IN_EPR:
+ ++in_count;
+ _tx_dbg1("TX ISR", epr);
+ if (ao_usb_epr_ctr_tx(epr)) {
+ ao_usb_in_pending = 0;
+ ao_wakeup(&ao_usb_in_pending);
+ }
+ break;
+ case AO_USB_INT_EPR:
+ ++int_count;
+ if (ao_usb_epr_ctr_tx(epr))
+ _ao_usb_set_stat_tx(AO_USB_INT_EPR, STM_USB_EPR_STAT_TX_NAK);
+ break;
+ }
+ return;
+ }
+
+ if (istr & (1 << STM_USB_ISTR_RESET)) {
+ ++reset_count;
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_RESET;
+ ao_usb_ep0_handle(ao_usb_ep0_receive);
+ }
+
+}
+
+/* Queue the current IN buffer for transmission */
+static void
+_ao_usb_in_send(void)
+{
+ _tx_dbg0("in_send start");
+ debug ("send %d\n", ao_usb_tx_count);
+ while (ao_usb_in_pending)
+ ao_sleep(&ao_usb_in_pending);
+ ao_usb_in_pending = 1;
+ if (ao_usb_tx_count != AO_USB_IN_SIZE)
+ ao_usb_in_flushed = 1;
+ ao_usb_copy_tx(ao_usb_tx_buffer, ao_usb_in_tx_buffer, ao_usb_tx_count);
+ ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_in_tx_offset;
+ ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = ao_usb_tx_count;
+ ao_usb_tx_count = 0;
+ _ao_usb_set_stat_tx(AO_USB_IN_EPR, STM_USB_EPR_STAT_TX_VALID);
+ _tx_dbg0("in_send end");
+}
+
+/* Wait for a free IN buffer. Interrupts are blocked */
+static void
+_ao_usb_in_wait(void)
+{
+ for (;;) {
+ /* Check if the current buffer is writable */
+ if (ao_usb_tx_count < AO_USB_IN_SIZE)
+ break;
+
+ _tx_dbg0("in_wait top");
+ /* Wait for an IN buffer to be ready */
+ while (ao_usb_in_pending)
+ ao_sleep(&ao_usb_in_pending);
+ _tx_dbg0("in_wait bottom");
+ }
+}
+
+void
+ao_usb_flush(void)
+{
+ if (!ao_usb_running)
+ return;
+
+ /* Anytime we've sent a character since
+ * the last time we flushed, we'll need
+ * to send a packet -- the only other time
+ * we would send a packet is when that
+ * packet was full, in which case we now
+ * want to send an empty packet
+ */
+ ao_arch_block_interrupts();
+ while (!ao_usb_in_flushed) {
+ _tx_dbg0("flush top");
+ _ao_usb_in_send();
+ _tx_dbg0("flush end");
+ }
+ ao_arch_release_interrupts();
+}
+
+void
+ao_usb_putchar(char c)
+{
+ if (!ao_usb_running)
+ return;
+
+ ao_arch_block_interrupts();
+ _ao_usb_in_wait();
+
+ ao_usb_in_flushed = 0;
+ ao_usb_tx_buffer[ao_usb_tx_count++] = (uint8_t) c;
+
+ /* Send the packet when full */
+ if (ao_usb_tx_count == AO_USB_IN_SIZE) {
+ _tx_dbg0("putchar full");
+ _ao_usb_in_send();
+ _tx_dbg0("putchar flushed");
+ }
+ ao_arch_release_interrupts();
+}
+
+static void
+_ao_usb_out_recv(void)
+{
+ _rx_dbg0("out_recv top");
+ ao_usb_out_avail = 0;
+
+ ao_usb_rx_count = ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx & STM_USB_BDT_COUNT_RX_COUNT_RX_MASK;
+
+ _rx_dbg1("out_recv count", ao_usb_rx_count);
+ debug ("recv %d\n", ao_usb_rx_count);
+ debug_data("Fill OUT len %d:", ao_usb_rx_count);
+ ao_usb_copy_rx(ao_usb_rx_buffer, ao_usb_out_rx_buffer, ao_usb_rx_count);
+ debug_data("\n");
+ ao_usb_rx_pos = 0;
+
+ /* ACK the packet */
+ _ao_usb_set_stat_rx(AO_USB_OUT_EPR, STM_USB_EPR_STAT_RX_VALID);
+}
+
+int
+_ao_usb_pollchar(void)
+{
+ uint8_t c;
+
+ if (!ao_usb_running)
+ return AO_READ_AGAIN;
+
+ for (;;) {
+ if (ao_usb_rx_pos != ao_usb_rx_count)
+ break;
+
+ _rx_dbg0("poll check");
+ /* Check to see if a packet has arrived */
+ if (!ao_usb_out_avail) {
+ _rx_dbg0("poll none");
+ return AO_READ_AGAIN;
+ }
+ _ao_usb_out_recv();
+ }
+
+ /* Pull a character out of the fifo */
+ c = ao_usb_rx_buffer[ao_usb_rx_pos++];
+ return c;
+}
+
+char
+ao_usb_getchar(void)
+{
+ int c;
+
+ ao_arch_block_interrupts();
+ while ((c = _ao_usb_pollchar()) == AO_READ_AGAIN)
+ ao_sleep(AO_USB_OUT_SLEEP_ADDR);
+ ao_arch_release_interrupts();
+ return c;
+}
+
+#if AO_USB_DIRECTIO
+uint16_t *
+ao_usb_alloc(void)
+{
+ uint16_t *buffer;
+
+ if (!ao_usb_running)
+ return NULL;
+ buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_sram_addr += AO_USB_IN_SIZE;
+ return buffer;
+}
+
+void
+ao_usb_free(uint16_t *addr)
+{
+ uint16_t offset = ao_usb_packet_buffer_offset(addr);
+ if (offset < ao_usb_sram_addr)
+ ao_usb_sram_addr = offset;
+}
+
+void
+ao_usb_write(uint16_t *buffer, uint16_t len)
+{
+ ao_arch_block_interrupts();
+
+ /* Flush any pending regular */
+ if (ao_usb_tx_count)
+ _ao_usb_in_send();
+
+ while (ao_usb_in_pending)
+ ao_sleep(&ao_usb_in_pending);
+ ao_usb_in_pending = 1;
+ ao_usb_in_flushed = (len != AO_USB_IN_SIZE);
+ ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_packet_buffer_offset(buffer);
+ ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = len;
+ _ao_usb_set_stat_tx(AO_USB_IN_EPR, STM_USB_EPR_STAT_TX_VALID);
+ ao_arch_release_interrupts();
+}
+#endif
+
+void
+ao_usb_disable(void)
+{
+ ao_arch_block_interrupts();
+ stm_usb.cntr = (1 << STM_USB_CNTR_FRES);
+ stm_usb.istr = 0;
+
+ /* Disable USB pull-up */
+ stm_usb.bcdr &= ~(1 << STM_USB_BCDR_DPPU);
+
+ /* Switch off the device */
+ stm_usb.cntr = (1 << STM_USB_CNTR_PDWN) | (1 << STM_USB_CNTR_FRES);
+
+ /* Disable the interface */
+ stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_USBEN);
+ ao_arch_release_interrupts();
+}
+
+void
+ao_usb_enable(void)
+{
+ int t;
+
+ /* Select HSI48 as USB clock source */
+ stm_rcc.cfgr3 &= ~(1 << STM_RCC_CFGR3_USBSW);
+
+ /* Enable USB device */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_USBEN);
+
+ /* Clear reset condition */
+ stm_rcc.apb1rstr &= ~(1 << STM_RCC_APB1RSTR_USBRST);
+
+ /* Disable USB pull-up */
+ stm_usb.bcdr &= ~(1 << STM_USB_BCDR_DPPU);
+
+ /* Do not touch the GPIOA configuration; USB takes priority
+ * over GPIO on pins A11 and A12, but if you select alternate
+ * input 10 (the documented correct selection), then USB is
+ * pulled low and doesn't work at all
+ */
+
+ ao_arch_block_interrupts();
+
+ /* Route interrupts */
+ stm_nvic_set_enable(STM_ISR_USB_POS);
+ stm_nvic_set_priority(STM_ISR_USB_POS, 3);
+
+ ao_usb_configuration = 0;
+
+ /* Set up buffer descriptors */
+ ao_usb_init_btable();
+
+ /* Reset the USB controller */
+ stm_usb.cntr = (1 << STM_USB_CNTR_FRES);
+
+ /* Clear the reset bit */
+ stm_usb.cntr = 0;
+
+ /* Clear any spurious interrupts */
+ stm_usb.istr = 0;
+
+ ao_usb_set_ep0();
+
+ debug ("ao_usb_enable\n");
+
+ /* Enable interrupts */
+ stm_usb.cntr = ((1 << STM_USB_CNTR_CTRM) |
+ (0 << STM_USB_CNTR_PMAOVRM) |
+ (0 << STM_USB_CNTR_ERRM) |
+ (0 << STM_USB_CNTR_WKUPM) |
+ (0 << STM_USB_CNTR_SUSPM) |
+ (1 << STM_USB_CNTR_RESETM) |
+ (0 << STM_USB_CNTR_SOFM) |
+ (0 << STM_USB_CNTR_ESOFM) |
+ (0 << STM_USB_CNTR_RESUME) |
+ (0 << STM_USB_CNTR_FSUSP) |
+ (0 << STM_USB_CNTR_LP_MODE) |
+ (0 << STM_USB_CNTR_PDWN) |
+ (0 << STM_USB_CNTR_FRES));
+
+ ao_arch_release_interrupts();
+
+ for (t = 0; t < 1000; t++)
+ ao_arch_nop();
+
+ /* Enable USB pull-up */
+ stm_usb.bcdr |= (1 << STM_USB_BCDR_DPPU);
+}
+
+#if USB_ECHO
+struct ao_task ao_usb_echo_task;
+
+static void
+ao_usb_echo(void)
+{
+ char c;
+
+ for (;;) {
+ c = ao_usb_getchar();
+ ao_usb_putchar(c);
+ ao_usb_flush();
+ }
+}
+#endif
+
+#if USB_DEBUG
+static void
+ao_usb_irq(void)
+{
+ printf ("control: %d out: %d in: %d int: %d reset: %d\n",
+ control_count, out_count, in_count, int_count, reset_count);
+}
+
+__code struct ao_cmds ao_usb_cmds[] = {
+ { ao_usb_irq, "I\0Show USB interrupt counts" },
+ { 0, NULL }
+};
+#endif
+
+void
+ao_usb_init(void)
+{
+ /* Turn on syscfg */
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN);
+
+ /* Set PA11/PA12 remapping bit */
+ stm_syscfg.cfgr1 |= (AO_PA11_PA12_RMP << STM_SYSCFG_CFGR1_PA11_PA12_RMP);
+
+ ao_usb_enable();
+
+ debug ("ao_usb_init\n");
+ ao_usb_ep0_state = AO_USB_EP0_IDLE;
+#if USB_ECHO
+ ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo");
+#endif
+#if USB_DEBUG
+ ao_cmd_register(&ao_usb_cmds[0]);
+#endif
+#if !USB_ECHO
+#if USE_USB_STDIO
+ ao_add_stdio(_ao_usb_pollchar, ao_usb_putchar, ao_usb_flush);
+#endif
+#endif
+}
+
+#if TX_DBG || RX_DBG
+
+struct ao_usb_dbg {
+ int line;
+ char *msg;
+ uint32_t value;
+ uint32_t primask;
+#if TX_DBG
+ uint16_t in_count;
+ uint32_t in_epr;
+ uint32_t in_pending;
+ uint32_t tx_count;
+ uint32_t in_flushed;
+#endif
+#if RX_DBG
+ uint8_t rx_count;
+ uint8_t rx_pos;
+ uint8_t out_avail;
+ uint32_t out_epr;
+#endif
+};
+
+#define NUM_USB_DBG 128
+
+static struct ao_usb_dbg dbg[128];
+static int dbg_i;
+
+static void _dbg(int line, char *msg, uint32_t value)
+{
+ uint32_t primask;
+ dbg[dbg_i].line = line;
+ dbg[dbg_i].msg = msg;
+ dbg[dbg_i].value = value;
+ asm("mrs %0,primask" : "=&r" (primask));
+ dbg[dbg_i].primask = primask;
+#if TX_DBG
+ dbg[dbg_i].in_count = in_count;
+ dbg[dbg_i].in_epr = stm_usb.epr[AO_USB_IN_EPR];
+ dbg[dbg_i].in_pending = ao_usb_in_pending;
+ dbg[dbg_i].tx_count = ao_usb_tx_count;
+ dbg[dbg_i].in_flushed = ao_usb_in_flushed;
+#endif
+#if RX_DBG
+ dbg[dbg_i].rx_count = ao_usb_rx_count;
+ dbg[dbg_i].rx_pos = ao_usb_rx_pos;
+ dbg[dbg_i].out_avail = ao_usb_out_avail;
+ dbg[dbg_i].out_epr = stm_usb.epr[AO_USB_OUT_EPR];
+#endif
+ if (++dbg_i == NUM_USB_DBG)
+ dbg_i = 0;
+}
+#endif
diff --git a/src/stmf0/registers.ld b/src/stmf0/registers.ld
new file mode 100644
index 00000000..598fc1af
--- /dev/null
+++ b/src/stmf0/registers.ld
@@ -0,0 +1,57 @@
+stm_gpiof = 0x48001400;
+stm_gpioc = 0x48000800;
+stm_gpiob = 0x48000400;
+stm_gpioa = 0x48000000;
+
+stm_tsc = 0x40024000;
+stm_crc = 0x40023000;
+stm_flash = 0x40022000;
+stm_rcc = 0x40021000;
+stm_dma = 0x40020000;
+stm_dbgmcu = 0x40015800;
+stm_tim17 = 0x40014800;
+stm_tim16 = 0x40014400;
+stm_usart1 = 0x40013800;
+stm_spi1 = 0x40013000;
+stm_tim1 = 0x40012c00;
+stm_adc = 0x40012400;
+
+stm_exti = 0x40010400;
+stm_syscfg = 0x40010000;
+
+stm_cec = 0x40007800;
+
+stm_pwr = 0x40007000;
+stm_crs = 0x40006c00;
+
+stm_bxcan = 0x40006400;
+stm_usb_sram = 0x40006000;
+stm_usb = 0x40005c00;
+
+stm_i2c1 = 0x40005400;
+
+stm_usart2 = 0x40004400;
+
+stm_spi2 = 0x40003800; /* docs are broken here */
+
+stm_iwdg = 0x40003000;
+stm_wwdg = 0x40002c00;
+stm_rtc = 0x40002800;
+
+stm_tim14 = 0x40002000;
+
+stm_tim3 = 0x40000400;
+stm_tim2 = 0x40000000;
+
+stm_systick = 0xe000e010;
+
+stm_nvic = 0xe000e100;
+
+stm_scb = 0xe000ed00;
+
+stm_mpu = 0xe000ed90;
+
+/* calibration data in system memory */
+stm_cal = 0x1ffff7b8;
+stm_flash_size_04x = 0x1ffff7cc;
+stm_device_id = 0x1ff80050;
diff --git a/src/stmf0/stm32f0.h b/src/stmf0/stm32f0.h
new file mode 100644
index 00000000..ce8ca456
--- /dev/null
+++ b/src/stmf0/stm32f0.h
@@ -0,0 +1,1667 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _STM32F0_H_
+#define _STM32F0_H_
+
+#include <stdint.h>
+
+typedef volatile uint32_t vuint32_t;
+typedef volatile void * vvoid_t;
+typedef volatile uint16_t vuint16_t;
+typedef volatile uint8_t vuint8_t;
+
+struct stm_gpio {
+ vuint32_t moder;
+ vuint32_t otyper;
+ vuint32_t ospeedr;
+ vuint32_t pupdr;
+
+ vuint32_t idr;
+ vuint32_t odr;
+ vuint32_t bsrr;
+ vuint32_t lckr;
+
+ vuint32_t afrl;
+ vuint32_t afrh;
+ vuint32_t brr;
+};
+
+#define STM_MODER_SHIFT(pin) ((pin) << 1)
+#define STM_MODER_MASK 3
+#define STM_MODER_INPUT 0
+#define STM_MODER_OUTPUT 1
+#define STM_MODER_ALTERNATE 2
+#define STM_MODER_ANALOG 3
+
+static inline void
+stm_moder_set(struct stm_gpio *gpio, int pin, vuint32_t value) {
+ gpio->moder = ((gpio->moder &
+ ~(STM_MODER_MASK << STM_MODER_SHIFT(pin))) |
+ value << STM_MODER_SHIFT(pin));
+}
+
+static inline uint32_t
+stm_moder_get(struct stm_gpio *gpio, int pin) {
+ return (gpio->moder >> STM_MODER_SHIFT(pin)) & STM_MODER_MASK;
+}
+
+#define STM_OTYPER_SHIFT(pin) (pin)
+#define STM_OTYPER_MASK 1
+#define STM_OTYPER_PUSH_PULL 0
+#define STM_OTYPER_OPEN_DRAIN 1
+
+static inline void
+stm_otyper_set(struct stm_gpio *gpio, int pin, vuint32_t value) {
+ gpio->otyper = ((gpio->otyper &
+ ~(STM_OTYPER_MASK << STM_OTYPER_SHIFT(pin))) |
+ value << STM_OTYPER_SHIFT(pin));
+}
+
+static inline uint32_t
+stm_otyper_get(struct stm_gpio *gpio, int pin) {
+ return (gpio->otyper >> STM_OTYPER_SHIFT(pin)) & STM_OTYPER_MASK;
+}
+
+#define STM_OSPEEDR_SHIFT(pin) ((pin) << 1)
+#define STM_OSPEEDR_MASK 3
+#define STM_OSPEEDR_LOW 0 /* 2MHz */
+#define STM_OSPEEDR_MEDIUM 1 /* 10MHz */
+#define STM_OSPEEDR_HIGH 3 /* 10-50MHz */
+
+static inline void
+stm_ospeedr_set(struct stm_gpio *gpio, int pin, vuint32_t value) {
+ gpio->ospeedr = ((gpio->ospeedr &
+ ~(STM_OSPEEDR_MASK << STM_OSPEEDR_SHIFT(pin))) |
+ value << STM_OSPEEDR_SHIFT(pin));
+}
+
+static inline uint32_t
+stm_ospeedr_get(struct stm_gpio *gpio, int pin) {
+ return (gpio->ospeedr >> STM_OSPEEDR_SHIFT(pin)) & STM_OSPEEDR_MASK;
+}
+
+#define STM_PUPDR_SHIFT(pin) ((pin) << 1)
+#define STM_PUPDR_MASK 3
+#define STM_PUPDR_NONE 0
+#define STM_PUPDR_PULL_UP 1
+#define STM_PUPDR_PULL_DOWN 2
+#define STM_PUPDR_RESERVED 3
+
+static inline void
+stm_pupdr_set(struct stm_gpio *gpio, int pin, uint32_t value) {
+ gpio->pupdr = ((gpio->pupdr &
+ ~(STM_PUPDR_MASK << STM_PUPDR_SHIFT(pin))) |
+ value << STM_PUPDR_SHIFT(pin));
+}
+
+static inline uint32_t
+stm_pupdr_get(struct stm_gpio *gpio, int pin) {
+ return (gpio->pupdr >> STM_PUPDR_SHIFT(pin)) & STM_PUPDR_MASK;
+}
+
+#define STM_AFR_SHIFT(pin) ((pin) << 2)
+#define STM_AFR_MASK 0xf
+#define STM_AFR_NONE 0
+#define STM_AFR_AF0 0x0
+#define STM_AFR_AF1 0x1
+#define STM_AFR_AF2 0x2
+#define STM_AFR_AF3 0x3
+#define STM_AFR_AF4 0x4
+#define STM_AFR_AF5 0x5
+#define STM_AFR_AF6 0x6
+#define STM_AFR_AF7 0x7
+
+static inline void
+stm_afr_set(struct stm_gpio *gpio, int pin, uint32_t value) {
+ /*
+ * Set alternate pin mode too
+ */
+ stm_moder_set(gpio, pin, STM_MODER_ALTERNATE);
+ if (pin < 8)
+ gpio->afrl = ((gpio->afrl &
+ ~(STM_AFR_MASK << STM_AFR_SHIFT(pin))) |
+ value << STM_AFR_SHIFT(pin));
+ else {
+ pin -= 8;
+ gpio->afrh = ((gpio->afrh &
+ ~(STM_AFR_MASK << STM_AFR_SHIFT(pin))) |
+ value << STM_AFR_SHIFT(pin));
+ }
+}
+
+static inline uint32_t
+stm_afr_get(struct stm_gpio *gpio, int pin) {
+ if (pin < 8)
+ return (gpio->afrl >> STM_AFR_SHIFT(pin)) & STM_AFR_MASK;
+ else {
+ pin -= 8;
+ return (gpio->afrh >> STM_AFR_SHIFT(pin)) & STM_AFR_MASK;
+ }
+}
+
+static inline void
+stm_gpio_set(struct stm_gpio *gpio, int pin, uint8_t value) {
+ /* Use the bit set/reset register to do this atomically */
+ gpio->bsrr = ((uint32_t) (value ^ 1) << (pin + 16)) | ((uint32_t) value << pin);
+}
+
+static inline uint8_t
+stm_gpio_get(struct stm_gpio *gpio, int pin) {
+ return (gpio->idr >> pin) & 1;
+}
+
+static inline uint16_t
+stm_gpio_get_all(struct stm_gpio *gpio) {
+ return gpio->idr;
+}
+
+/*
+ * We can't define these in registers.ld or our fancy
+ * ao_enable_gpio macro will expand into a huge pile of code
+ * as the compiler won't do correct constant folding and
+ * dead-code elimination
+ */
+
+extern struct stm_gpio stm_gpioa;
+extern struct stm_gpio stm_gpiob;
+extern struct stm_gpio stm_gpioc;
+extern struct stm_gpio stm_gpiof;
+
+#define stm_gpiof (*((struct stm_gpio *) 0x48001400))
+#define stm_gpioc (*((struct stm_gpio *) 0x48000800))
+#define stm_gpiob (*((struct stm_gpio *) 0x48000400))
+#define stm_gpioa (*((struct stm_gpio *) 0x48000000))
+
+/* Flash interface */
+
+struct stm_flash {
+ vuint32_t acr;
+ vuint32_t keyr;
+ vuint32_t optkeyr;
+ vuint32_t sr;
+
+ vuint32_t cr;
+ vuint32_t ar;
+ vuint32_t unused_0x18;
+ vuint32_t obr;
+
+ vuint32_t wrpr;
+};
+
+extern struct stm_flash stm_flash;
+
+#define STM_FLASH_ACR_PRFTBS (5)
+#define STM_FLASH_ACR_PRFTBE (4)
+#define STM_FLASH_ACR_LATENCY (0)
+#define STM_FLASH_ACR_LATENCY_0 0
+#define STM_FLASH_ACR_LATENCY_1 1
+
+#define STM_FLASH_PECR_OBL_LAUNCH 18
+#define STM_FLASH_PECR_ERRIE 17
+#define STM_FLASH_PECR_EOPIE 16
+#define STM_FLASH_PECR_FPRG 10
+#define STM_FLASH_PECR_ERASE 9
+#define STM_FLASH_PECR_FTDW 8
+#define STM_FLASH_PECR_DATA 4
+#define STM_FLASH_PECR_PROG 3
+#define STM_FLASH_PECR_OPTLOCK 2
+#define STM_FLASH_PECR_PRGLOCK 1
+#define STM_FLASH_PECR_PELOCK 0
+
+#define STM_FLASH_SR_EOP 5
+#define STM_FLASH_SR_WRPRTERR 4
+#define STM_FLASH_SR_PGERR 2
+#define STM_FLASH_SR_BSY 0
+
+#define STM_FLASH_CR_OBL_LAUNCH 13
+#define STM_FLASH_CR_EOPIE 12
+#define STM_FLASH_CR_ERRIE 10
+#define STM_FLASH_CR_OPTWRE 9
+#define STM_FLASH_CR_LOCK 7
+#define STM_FLASH_CR_STRT 6
+#define STM_FLASH_CR_OPTER 5
+#define STM_FLASH_CR_OPTPG 4
+#define STM_FLASH_CR_MER 2
+#define STM_FLASH_CR_PER 1
+#define STM_FLASH_CR_PG 0
+
+#define STM_FLASH_OBR_DATA1 24
+#define STM_FLASH_OBR_DATA0 16
+#define STM_FLASH_OBR_BOOT_SEL 15
+#define STM_FLASH_OBR_RAM_PARITY_CHECK 14
+#define STM_FLASH_OBR_VDDA_MONITOR 13
+#define STM_FLASH_OBR_NBOOT1 12
+#define STM_FLASH_OBR_NBOOT0 11
+#define STM_FLASH_OBR_NRST_STDBY 10
+#define STM_FLASH_OBR_NRST_STOP 9
+#define STM_FLASH_OBR_WDG_SW 8
+#define STM_FLASH_OBR_RDPRT 1
+#define STM_FLASH_OBR_RDPRT_LEVEL0 0
+#define STM_FLASH_OBR_RDPRT_LEVEL1 1
+#define STM_FLASH_OBR_RDPRT_LEVEL2 3
+#define STM_FLASH_OBR_OPTERR 0
+
+#define STM_FLASH_KEYR_KEY1 0x45670123
+#define STM_FLASH_KEYR_KEY2 0xcdef89ab
+
+struct stm_rcc {
+ vuint32_t cr;
+ vuint32_t cfgr;
+ vuint32_t cir;
+ vuint32_t apb2rstr;
+
+ vuint32_t apb1rstr;
+ vuint32_t ahbenr;
+ vuint32_t apb2enr;
+ vuint32_t apb1enr;
+
+ vuint32_t bdcr;
+ vuint32_t csr;
+ vuint32_t ahbrstr;
+ vuint32_t cfgr2;
+
+ vuint32_t cfgr3;
+ vuint32_t cr2;
+};
+
+extern struct stm_rcc stm_rcc;
+
+/* Nominal high speed internal oscillator frequency is 16MHz */
+#define STM_HSI_FREQ 16000000
+
+#define STM_RCC_CR_PLLRDY (25)
+#define STM_RCC_CR_PLLON (24)
+#define STM_RCC_CR_CSSON (19)
+#define STM_RCC_CR_HSEBYP (18)
+#define STM_RCC_CR_HSERDY (17)
+#define STM_RCC_CR_HSEON (16)
+#define STM_RCC_CR_HSICAL (8)
+#define STM_RCC_CR_HSITRIM (3)
+#define STM_RCC_CR_HSIRDY (1)
+#define STM_RCC_CR_HSION (0)
+
+#define STM_RCC_CFGR_PLL_NODIV (31)
+#define STM_RCC_CFGR_PLL_NODIV_DIV_1 1
+#define STM_RCC_CFGR_PLL_NODIV_DIV_2 0
+
+#define STM_RCC_CFGR_MCOPRE (28)
+#define STM_RCC_CFGR_MCOPRE_DIV_1 0
+#define STM_RCC_CFGR_MCOPRE_DIV_2 1
+#define STM_RCC_CFGR_MCOPRE_DIV_4 2
+#define STM_RCC_CFGR_MCOPRE_DIV_8 3
+#define STM_RCC_CFGR_MCOPRE_DIV_16 4
+#define STM_RCC_CFGR_MCOPRE_DIV_32 5
+#define STM_RCC_CFGR_MCOPRE_DIV_64 6
+#define STM_RCC_CFGR_MCOPRE_DIV_128 7
+#define STM_RCC_CFGR_MCOPRE_DIV_MASK 7
+
+#define STM_RCC_CFGR_MCO (24)
+# define STM_RCC_CFGR_MCO_DISABLE 0
+
+#define STM_RCC_CFGR_PLLMUL (18)
+#define STM_RCC_CFGR_PLLMUL_2 0
+#define STM_RCC_CFGR_PLLMUL_3 1
+#define STM_RCC_CFGR_PLLMUL_4 2
+#define STM_RCC_CFGR_PLLMUL_5 3
+#define STM_RCC_CFGR_PLLMUL_6 4
+#define STM_RCC_CFGR_PLLMUL_7 5
+#define STM_RCC_CFGR_PLLMUL_8 6
+#define STM_RCC_CFGR_PLLMUL_9 7
+#define STM_RCC_CFGR_PLLMUL_10 8
+#define STM_RCC_CFGR_PLLMUL_11 9
+#define STM_RCC_CFGR_PLLMUL_12 10
+#define STM_RCC_CFGR_PLLMUL_13 11
+#define STM_RCC_CFGR_PLLMUL_14 12
+#define STM_RCC_CFGR_PLLMUL_15 13
+#define STM_RCC_CFGR_PLLMUL_16 14
+#define STM_RCC_CFGR_PLLMUL_MASK 0xf
+
+#define STM_RCC_CFGR_PLLXTPRE (17)
+
+#define STM_RCC_CFGR_PLLSRC (15)
+# define STM_RCC_CFGR_PLLSRC_HSI_DIV_2 0
+# define STM_RCC_CFGR_PLLSRC_HSI 1
+# define STM_RCC_CFGR_PLLSRC_HSE 2
+# define STM_RCC_CFGR_PLLSRC_HSI48 3
+
+#define STM_RCC_CFGR_ADCPRE (14)
+
+#define STM_RCC_CFGR_PPRE (8)
+#define STM_RCC_CFGR_PPRE_DIV_1 0
+#define STM_RCC_CFGR_PPRE_DIV_2 4
+#define STM_RCC_CFGR_PPRE_DIV_4 5
+#define STM_RCC_CFGR_PPRE_DIV_8 6
+#define STM_RCC_CFGR_PPRE_DIV_16 7
+#define STM_RCC_CFGR_PPRE_MASK 7
+
+#define STM_RCC_CFGR_HPRE (4)
+#define STM_RCC_CFGR_HPRE_DIV_1 0
+#define STM_RCC_CFGR_HPRE_DIV_2 8
+#define STM_RCC_CFGR_HPRE_DIV_4 9
+#define STM_RCC_CFGR_HPRE_DIV_8 0xa
+#define STM_RCC_CFGR_HPRE_DIV_16 0xb
+#define STM_RCC_CFGR_HPRE_DIV_64 0xc
+#define STM_RCC_CFGR_HPRE_DIV_128 0xd
+#define STM_RCC_CFGR_HPRE_DIV_256 0xe
+#define STM_RCC_CFGR_HPRE_DIV_512 0xf
+#define STM_RCC_CFGR_HPRE_MASK 0xf
+
+#define STM_RCC_CFGR_SWS (2)
+#define STM_RCC_CFGR_SWS_HSI 0
+#define STM_RCC_CFGR_SWS_HSE 1
+#define STM_RCC_CFGR_SWS_PLL 2
+#define STM_RCC_CFGR_SWS_HSI48 3
+#define STM_RCC_CFGR_SWS_MASK 3
+
+#define STM_RCC_CFGR_SW (0)
+#define STM_RCC_CFGR_SW_HSI 0
+#define STM_RCC_CFGR_SW_HSE 1
+#define STM_RCC_CFGR_SW_PLL 2
+#define STM_RCC_CFGR_SW_HSI48 3
+#define STM_RCC_CFGR_SW_MASK 3
+
+#define STM_RCC_APB2RSTR_DBGMCURST 22
+#define STM_RCC_APB2RSTR_TIM17RST 18
+#define STM_RCC_APB2RSTR_TIM16RST 17
+#define STM_RCC_APB2RSTR_TIM15RST 16
+#define STM_RCC_APB2RSTR_USART1RST 14
+#define STM_RCC_APB2RSTR_SPI1RST 12
+#define STM_RCC_APB2RSTR_TIM1RST 11
+#define STM_RCC_APB2RSTR_ADCRST 9
+#define STM_RCC_APB2RSTR_USART8RST 7
+#define STM_RCC_APB2RSTR_USART7RST 6
+#define STM_RCC_APB2RSTR_USART6RST 5
+#define STM_RCC_APB2RSTR_SYSCFGRST 1
+
+#define STM_RCC_APB1RSTR_CECRST 30
+#define STM_RCC_APB1RSTR_DACRST 29
+#define STM_RCC_APB1RSTR_PWRRST 28
+#define STM_RCC_APB1RSTR_CRSRST 27
+#define STM_RCC_APB1RSTR_CANRST 25
+#define STM_RCC_APB1RSTR_USBRST 23
+#define STM_RCC_APB1RSTR_I2C2RST 22
+#define STM_RCC_APB1RSTR_I1C1RST 21
+#define STM_RCC_APB1RSTR_USART5RST 20
+#define STM_RCC_APB1RSTR_USART4RST 19
+#define STM_RCC_APB1RSTR_USART3RST 18
+#define STM_RCC_APB1RSTR_USART2RST 17
+#define STM_RCC_APB1RSTR_SPI2RST 14
+#define STM_RCC_APB1RSTR_WWDGRST 11
+#define STM_RCC_APB1RSTR_TIM14RST 8
+#define STM_RCC_APB1RSTR_TIM7RST 5
+#define STM_RCC_APB1RSTR_TIM6RST 4
+#define STM_RCC_APB1RSTR_TIM3RST 1
+#define STM_RCC_APB1RSTR_TIM2RST 0
+
+#define STM_RCC_AHBENR_TSCEN 24
+#define STM_RCC_AHBENR_IOPFEN 22
+#define STM_RCC_AHBENR_IOPEEN 21
+#define STM_RCC_AHBENR_IOPDEN 20
+#define STM_RCC_AHBENR_IOPCEN 19
+#define STM_RCC_AHBENR_IOPBEN 18
+#define STM_RCC_AHBENR_IOPAEN 17
+#define STM_RCC_AHBENR_CRCEN 6
+#define STM_RCC_AHBENR_FLITFEN 4
+#define STM_RCC_AHBENR_SRAMEN 2
+#define STM_RCC_AHBENR_DMA2EN 1
+#define STM_RCC_AHBENR_DMAEN 0
+
+#define STM_RCC_APB2ENR_DBGMCUEN 22
+#define STM_RCC_APB2ENR_TIM17EN 18
+#define STM_RCC_APB2ENR_TIM16EN 17
+#define STM_RCC_APB2ENR_TIM15EN 16
+#define STM_RCC_APB2ENR_USART1EN 14
+#define STM_RCC_APB2ENR_SPI1EN 12
+#define STM_RCC_APB2ENR_TIM1EN 11
+#define STM_RCC_APB2ENR_ADCEN 9
+#define STM_RCC_APB2ENR_USART8EN 7
+#define STM_RCC_APB2ENR_USART7EN 6
+#define STM_RCC_APB2ENR_USART6EN 5
+#define STM_RCC_APB2ENR_SYSCFGCOMPEN 0
+
+#define STM_RCC_APB1ENR_CECEN 30
+#define STM_RCC_APB1ENR_DACEN 29
+#define STM_RCC_APB1ENR_PWREN 28
+#define STM_RCC_APB1ENR_CRSEN 27
+#define STM_RCC_APB1ENR_CANEN 25
+#define STM_RCC_APB1ENR_USBEN 23
+#define STM_RCC_APB1ENR_I2C2EN 22
+#define STM_RCC_APB1ENR_IC21EN 21
+#define STM_RCC_APB1ENR_USART5EN 20
+#define STM_RCC_APB1ENR_USART4EN 19
+#define STM_RCC_APB1ENR_USART3EN 18
+#define STM_RCC_APB1ENR_USART2EN 17
+#define STM_RCC_APB1ENR_SPI2EN 14
+#define STM_RCC_APB1ENR_WWDGEN 11
+#define STM_RCC_APB1ENR_TIM14EN 8
+#define STM_RCC_APB1ENR_TIM7EN 5
+#define STM_RCC_APB1ENR_TIM6EN 4
+#define STM_RCC_APB1ENR_TIM3EN 1
+#define STM_RCC_APB1ENR_TIM2EN 0
+
+#define STM_RCC_CSR_LPWRRSTF (31)
+#define STM_RCC_CSR_WWDGRSTF (30)
+#define STM_RCC_CSR_IWDGRSTF (29)
+#define STM_RCC_CSR_SFTRSTF (28)
+#define STM_RCC_CSR_PORRSTF (27)
+#define STM_RCC_CSR_PINRSTF (26)
+#define STM_RCC_CSR_OBLRSTF (25)
+#define STM_RCC_CSR_RMVF (24)
+#define STM_RCC_CSR_V18PWRRSTF (23)
+#define STM_RCC_CSR_LSIRDY (1)
+#define STM_RCC_CSR_LSION (0)
+
+#define STM_RCC_CR2_HSI48CAL 24
+#define STM_RCC_CR2_HSI48RDY 17
+#define STM_RCC_CR2_HSI48ON 16
+#define STM_RCC_CR2_HSI14CAL 8
+#define STM_RCC_CR2_HSI14TRIM 3
+#define STM_RCC_CR2_HSI14DIS 2
+#define STM_RCC_CR2_HSI14RDY 1
+#define STM_RCC_CR2_HSI14ON 0
+
+#define STM_RCC_CFGR3_USART3SW 18
+#define STM_RCC_CFGR3_USART2SW 16
+#define STM_RCC_CFGR3_ADCSW 8
+#define STM_RCC_CFGR3_USBSW 7
+#define STM_RCC_CFGR3_CECSW 6
+#define STM_RCC_CFGR3_I2C1SW 4
+#define STM_RCC_CFGR3_USART1SW 0
+
+struct stm_crs {
+ vuint32_t cr;
+ vuint32_t cfgr;
+ vuint32_t isr;
+ vuint32_t icr;
+};
+
+extern struct stm_crs stm_crs;
+
+#define STM_CRS_CR_TRIM 8
+#define STM_CRS_CR_SWSYNC 7
+#define STM_CRS_CR_AUTOTRIMEN 6
+#define STM_CRS_CR_CEN 5
+#define STM_CRS_CR_ESYNCIE 3
+#define STM_CRS_CR_ERRIE 2
+#define STM_CRS_CR_SYNCWARNIE 1
+#define STM_CRS_CR_SYNCOKIE 0
+
+#define STM_CRS_CFGR_SYNCPOL 31
+#define STM_CRS_CFGR_SYNCSRC 28
+#define STM_CRS_CFGR_SYNCSRC_GPIO 0
+#define STM_CRS_CFGR_SYNCSRC_LSE 1
+#define STM_CRS_CFGR_SYNCSRC_USB 2
+#define STM_CRS_CFGR_SYNCDIV 24
+#define STM_CRS_CFGR_SYNCDIV_1 0
+#define STM_CRS_CFGR_SYNCDIV_2 1
+#define STM_CRS_CFGR_SYNCDIV_4 2
+#define STM_CRS_CFGR_SYNCDIV_8 3
+#define STM_CRS_CFGR_SYNCDIV_16 4
+#define STM_CRS_CFGR_SYNCDIV_32 5
+#define STM_CRS_CFGR_SYNCDIV_64 6
+#define STM_CRS_CFGR_SYNCDIV_128 7
+#define STM_CRS_CFGR_FELIM 16
+#define STM_CRS_CFGR_RELOAD 0
+
+#define STM_CRS_ISR_FECAP 16
+#define STM_CRS_ISR_FEDIR 15
+#define STM_CRS_ISR_TRIMOVF 10
+#define STM_CRS_ISR_SYNCMISS 9
+#define STM_CRS_ISR_SYNCERR 8
+#define STM_CRS_ISR_ESYNCF 3
+#define STM_CRS_ISR_ERRF 2
+#define STM_CRS_ISR_SYNCWARNF 1
+#define STM_CRS_ISR_SYNCOKF 0
+
+#define STM_CRS_ICR_ESYNCC 3
+#define STM_CRS_ICR_ERRC 2
+#define STM_CRS_ICR_SYNCWARNC 1
+#define STM_CRS_ICR_SYNCOKC 0
+
+struct stm_pwr {
+ vuint32_t cr;
+ vuint32_t csr;
+};
+
+extern struct stm_pwr stm_pwr;
+
+#define STM_PWR_CR_DBP (8)
+
+#define STM_PWR_CR_PLS (5)
+#define STM_PWR_CR_PLS_2_0 0
+#define STM_PWR_CR_PLS_2_1 1
+#define STM_PWR_CR_PLS_2_2 2
+#define STM_PWR_CR_PLS_2_3 3
+#define STM_PWR_CR_PLS_2_4 4
+#define STM_PWR_CR_PLS_2_5 5
+#define STM_PWR_CR_PLS_2_6 6
+#define STM_PWR_CR_PLS_EXT 7
+#define STM_PWR_CR_PLS_MASK 7
+
+#define STM_PWR_CR_PVDE (4)
+#define STM_PWR_CR_CSBF (3)
+#define STM_PWR_CR_CWUF (2)
+#define STM_PWR_CR_PDDS (1)
+#define STM_PWR_CR_LPSDSR (0)
+
+#define STM_PWR_CSR_EWUP3 (10)
+#define STM_PWR_CSR_EWUP2 (9)
+#define STM_PWR_CSR_EWUP1 (8)
+#define STM_PWR_CSR_REGLPF (5)
+#define STM_PWR_CSR_VOSF (4)
+#define STM_PWR_CSR_VREFINTRDYF (3)
+#define STM_PWR_CSR_PVDO (2)
+#define STM_PWR_CSR_SBF (1)
+#define STM_PWR_CSR_WUF (0)
+
+struct stm_crc {
+ union {
+ vuint32_t u32;
+ vuint16_t u16;
+ vuint8_t u8;
+ } dr;
+ vuint32_t idr;
+ vuint32_t cr;
+ uint32_t _0c;
+
+ vuint32_t init;
+ vuint32_t pol;
+};
+
+extern struct stm_crc stm_crc;
+
+#define stm_crc (*((struct stm_crc *) 0x40023000))
+
+#define STM_CRC_CR_REV_OUT 7
+#define STM_CRC_CR_REV_IN 5
+#define STM_CRC_CR_REV_IN_NONE 0
+#define STM_CRC_CR_REV_IN_BY_BYTE 1
+#define STM_CRC_CR_REV_IN_BY_HALF_WORD 2
+#define STM_CRC_CR_REV_IN_BY_WORD 3
+#define STM_CRC_CR_POLYSIZE 3
+#define STM_CRC_CR_POLYSIZE_32 0
+#define STM_CRC_CR_POLYSIZE_16 1
+#define STM_CRC_CR_POLYSIZE_8 2
+#define STM_CRC_CR_POLYSIZE_7 3
+#define STM_CRC_CR_RESET 0
+
+/* The SYSTICK starts at 0xe000e010 */
+
+struct stm_systick {
+ vuint32_t csr;
+ vuint32_t rvr;
+ vuint32_t cvr;
+ vuint32_t calib;
+};
+
+extern struct stm_systick stm_systick;
+
+#define STM_SYSTICK_CSR_ENABLE 0
+#define STM_SYSTICK_CSR_TICKINT 1
+#define STM_SYSTICK_CSR_CLKSOURCE 2
+#define STM_SYSTICK_CSR_CLKSOURCE_EXTERNAL 0
+#define STM_SYSTICK_CSR_CLKSOURCE_HCLK_8 1
+#define STM_SYSTICK_CSR_COUNTFLAG 16
+
+/* The NVIC starts at 0xe000e100, so add that to the offsets to find the absolute address */
+
+struct stm_nvic {
+ vuint32_t iser; /* 0x000 0xe000e100 Set Enable Register */
+
+ uint8_t _unused020[0x080 - 0x004];
+
+ vuint32_t icer; /* 0x080 0xe000e180 Clear Enable Register */
+
+ uint8_t _unused0a0[0x100 - 0x084];
+
+ vuint32_t ispr; /* 0x100 0xe000e200 Set Pending Register */
+
+ uint8_t _unused120[0x180 - 0x104];
+
+ vuint32_t icpr; /* 0x180 0xe000e280 Clear Pending Register */
+
+ uint8_t _unused1a0[0x300 - 0x184];
+
+ vuint32_t ipr[8]; /* 0x300 0xe000e400 Priority Register */
+};
+
+extern struct stm_nvic stm_nvic;
+
+#define IRQ_MASK(irq) (1 << (irq))
+#define IRQ_BOOL(v,irq) (((v) >> (irq)) & 1)
+
+static inline void
+stm_nvic_set_enable(int irq) {
+ stm_nvic.iser = IRQ_MASK(irq);
+}
+
+static inline void
+stm_nvic_clear_enable(int irq) {
+ stm_nvic.icer = IRQ_MASK(irq);
+}
+
+static inline int
+stm_nvic_enabled(int irq) {
+ return IRQ_BOOL(stm_nvic.iser, irq);
+}
+
+static inline void
+stm_nvic_set_pending(int irq) {
+ stm_nvic.ispr = IRQ_MASK(irq);
+}
+
+static inline void
+stm_nvic_clear_pending(int irq) {
+ stm_nvic.icpr = IRQ_MASK(irq);
+}
+
+static inline int
+stm_nvic_pending(int irq) {
+ return IRQ_BOOL(stm_nvic.ispr, irq);
+}
+
+#define IRQ_PRIO_REG(irq) ((irq) >> 2)
+#define IRQ_PRIO_BIT(irq) (((irq) & 3) << 3)
+#define IRQ_PRIO_MASK(irq) (0xff << IRQ_PRIO_BIT(irq))
+
+static inline void
+stm_nvic_set_priority(int irq, uint8_t prio) {
+ int n = IRQ_PRIO_REG(irq);
+ uint32_t v;
+
+ v = stm_nvic.ipr[n];
+ v &= ~IRQ_PRIO_MASK(irq);
+ v |= (prio) << IRQ_PRIO_BIT(irq);
+ stm_nvic.ipr[n] = v;
+}
+
+static inline uint8_t
+stm_nvic_get_priority(int irq) {
+ return (stm_nvic.ipr[IRQ_PRIO_REG(irq)] >> IRQ_PRIO_BIT(irq)) & IRQ_PRIO_MASK(0);
+}
+
+struct stm_scb {
+ vuint32_t cpuid;
+ vuint32_t icsr;
+ vuint32_t vtor;
+ vuint32_t aircr;
+
+ vuint32_t scr;
+ vuint32_t ccr;
+ vuint32_t shpr1;
+ vuint32_t shpr2;
+
+ vuint32_t shpr3;
+ vuint32_t shcrs;
+ vuint32_t cfsr;
+ vuint32_t hfsr;
+
+ uint32_t unused_30;
+ vuint32_t mmfar;
+ vuint32_t bfar;
+};
+
+extern struct stm_scb stm_scb;
+
+#define STM_SCB_AIRCR_VECTKEY 16
+#define STM_SCB_AIRCR_VECTKEY_KEY 0x05fa
+#define STM_SCB_AIRCR_PRIGROUP 8
+#define STM_SCB_AIRCR_SYSRESETREQ 2
+#define STM_SCB_AIRCR_VECTCLRACTIVE 1
+#define STM_SCB_AIRCR_VECTRESET 0
+
+#define isr(name) void stm_ ## name ## _isr(void);
+
+isr(nmi)
+isr(hardfault)
+isr(memmanage)
+isr(busfault)
+isr(usagefault)
+isr(svc)
+isr(debugmon)
+isr(pendsv)
+isr(systick)
+isr(wwdg)
+isr(pvd)
+isr(tamper_stamp)
+isr(rtc_wkup)
+isr(flash)
+isr(rcc)
+isr(exti0)
+isr(exti1)
+isr(exti2)
+isr(exti3)
+isr(exti4)
+isr(dma1_channel1)
+isr(dma1_channel2)
+isr(dma1_channel3)
+isr(dma1_channel4)
+isr(dma1_channel5)
+isr(dma1_channel6)
+isr(dma1_channel7)
+isr(adc1)
+isr(usb_hp)
+isr(usb_lp)
+isr(dac)
+isr(comp)
+isr(exti9_5)
+isr(lcd)
+isr(tim9)
+isr(tim10)
+isr(tim11)
+isr(tim2)
+isr(tim3)
+isr(tim4)
+isr(i2c1_ev)
+isr(i2c1_er)
+isr(i2c2_ev)
+isr(i2c2_er)
+isr(spi1)
+isr(spi2)
+isr(usart1)
+isr(usart2)
+isr(usart3)
+isr(exti15_10)
+isr(rtc_alarm)
+isr(usb_fs_wkup)
+isr(tim6)
+isr(tim7)
+
+#undef isr
+
+#define STM_ISR_WWDG_POS 0
+#define STM_ISR_PVD_VDDIO2_POS 1
+#define STM_ISR_RTC_POS 2
+#define STM_ISR_FLASH_POS 3
+#define STM_ISR_RCC_CRS_POS 4
+#define STM_ISR_EXTI0_1_POS 5
+#define STM_ISR_EXTI2_3_POS 6
+#define STM_ISR_EXTI4_15_POS 7
+#define STM_ISR_TSC_POS 8
+#define STM_ISR_DMA_CH1_POS 9
+#define STM_ISR_DMA_CH2_3_DMA2_CH1_2_POS 10
+#define STM_ISR_DMA_CH44_5_6_7_DMA2_CH3_4_5_POS 11
+#define STM_ISR_ADC_COMP_POS 12
+#define STM_ISR_TIM1_BRK_UP_TRG_COM_POS 13
+#define STM_ISR_TIM1_CC_POS 14
+#define STM_ISR_TIM2_POS 15
+#define STM_ISR_TIM3_POS 16
+#define STM_ISR_TIM6_DAC_POS 17
+#define STM_ISR_TIM7_POS 18
+#define STM_ISR_TIM14_POS 19
+#define STM_ISR_TIM15_POS 20
+#define STM_ISR_TIM16_POS 21
+#define STM_ISR_TIM17_POS 22
+#define STM_ISR_I2C1_POS 23
+#define STM_ISR_I2C2_POS 24
+#define STM_ISR_SPI1_POS 25
+#define STM_ISR_SPI2_POS 26
+#define STM_ISR_USART1_POS 27
+#define STM_ISR_USART2_POS 28
+#define STM_ISR_UASART3_4_5_6_7_8_POS 29
+#define STM_ISR_CEC_CAN_POS 30
+#define STM_ISR_USB_POS 31
+
+struct stm_syscfg {
+ vuint32_t cfgr1;
+ vuint32_t exticr[4];
+ vuint32_t cfgr2;
+};
+
+extern struct stm_syscfg stm_syscfg;
+
+#define STM_SYSCFG_CFGR1_TIM3_DMA_RMP 30
+#define STM_SYSCFG_CFGR1_TIM2_DMA_RMP 29
+#define STM_SYSCFG_CFGR1_TIM1_DMA_RMP 28
+#define STM_SYSCFG_CFGR1_I2C1_DMA_RMP 27
+#define STM_SYSCFG_CFGR1_USART3_DMA_RMP 26
+#define STM_SYSCFG_CFGR1_USART2_DMA_RMP 25
+#define STM_SYSCFG_CFGR1_SPI2_DMA_RMP 24
+#define STM_SYSCFG_CFGR1_I2C_PA10_FMP 23
+#define STM_SYSCFG_CFGR1_I2C_PA9_FMP 22
+#define STM_SYSCFG_CFGR1_I2C2_FMP 21
+#define STM_SYSCFG_CFGR1_I2C1_FMP 20
+#define STM_SYSCFG_CFGR1_I2C_PB9_FMP 19
+#define STM_SYSCFG_CFGR1_I2C_PB8_FMP 18
+#define STM_SYSCFG_CFGR1_I2C_PB7_FMP 17
+#define STM_SYSCFG_CFGR1_I2C_PB6_FMP 16
+#define STM_SYSCFG_CFGR1_TIM17_DMA_RMP2 14
+#define STM_SYSCFG_CFGR1_TIM16_DMA_RMP2 13
+#define STM_SYSCFG_CFGR1_TIM17_DMA_RMP 12
+#define STM_SYSCFG_CFGR1_TIM16_DMA_RMP 11
+#define STM_SYSCFG_CFGR1_USART1_RX_DMA_RMP 10
+#define STM_SYSCFG_CFGR1_USART1_TX_DMA_RMP 9
+#define STM_SYSCFG_CFGR1_ADC_DMA_RMP 8
+#define STM_SYSCFG_CFGR1_IRDA_ENV_SEL 6
+#define STM_SYSCFG_CFGR1_IRDA_ENV_SEL_TIMER16 0
+#define STM_SYSCFG_CFGR1_IRDA_ENV_SEL_USART1 1
+#define STM_SYSCFG_CFGR1_IRDA_ENV_SEL_USART4 2
+#define STM_SYSCFG_CFGR1_PA11_PA12_RMP 4
+#define STM_SYSCFG_CFGR1_MEM_MODE 0
+#define STM_SYSCFG_CFGR1_MEM_MODE_MAIN_FLASH 0
+#define STM_SYSCFG_CFGR1_MEM_MODE_SYSTEM_FLASH 1
+#define STM_SYSCFG_CFGR1_MEM_MODE_SRAM 3
+#define STM_SYSCFG_CFGR1_MEM_MODE_MASK 3
+
+#if 0
+static inline void
+stm_exticr_set(struct stm_gpio *gpio, int pin) {
+ uint8_t reg = pin >> 2;
+ uint8_t shift = (pin & 3) << 2;
+ uint8_t val = 0;
+
+ /* Enable SYSCFG */
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN);
+
+ if (gpio == &stm_gpioa)
+ val = STM_SYSCFG_EXTICR_PA;
+ else if (gpio == &stm_gpiob)
+ val = STM_SYSCFG_EXTICR_PB;
+ else if (gpio == &stm_gpioc)
+ val = STM_SYSCFG_EXTICR_PC;
+ else if (gpio == &stm_gpiof)
+ val = STM_SYSCFG_EXTICR_PF;
+
+ stm_syscfg.exticr[reg] = (stm_syscfg.exticr[reg] & ~(0xf << shift)) | val << shift;
+}
+#endif
+
+
+struct stm_dma_channel {
+ vuint32_t ccr;
+ vuint32_t cndtr;
+ vvoid_t cpar;
+ vvoid_t cmar;
+ vuint32_t reserved;
+};
+
+#define STM_NUM_DMA 6
+
+struct stm_dma {
+ vuint32_t isr;
+ vuint32_t ifcr;
+ struct stm_dma_channel channel[STM_NUM_DMA];
+};
+
+extern struct stm_dma stm_dma;
+
+/* DMA channels go from 1 to 6, instead of 0 to 5 (sigh)
+ */
+
+#define STM_DMA_INDEX(channel) ((channel) - 1)
+
+#define STM_DMA_ISR(index) ((index) << 2)
+#define STM_DMA_ISR_MASK 0xf
+#define STM_DMA_ISR_TEIF 3
+#define STM_DMA_ISR_HTIF 2
+#define STM_DMA_ISR_TCIF 1
+#define STM_DMA_ISR_GIF 0
+
+#define STM_DMA_IFCR(index) ((index) << 2)
+#define STM_DMA_IFCR_MASK 0xf
+#define STM_DMA_IFCR_CTEIF 3
+#define STM_DMA_IFCR_CHTIF 2
+#define STM_DMA_IFCR_CTCIF 1
+#define STM_DMA_IFCR_CGIF 0
+
+#define STM_DMA_CCR_MEM2MEM (14)
+
+#define STM_DMA_CCR_PL (12)
+#define STM_DMA_CCR_PL_LOW (0)
+#define STM_DMA_CCR_PL_MEDIUM (1)
+#define STM_DMA_CCR_PL_HIGH (2)
+#define STM_DMA_CCR_PL_VERY_HIGH (3)
+#define STM_DMA_CCR_PL_MASK (3)
+
+#define STM_DMA_CCR_MSIZE (10)
+#define STM_DMA_CCR_MSIZE_8 (0)
+#define STM_DMA_CCR_MSIZE_16 (1)
+#define STM_DMA_CCR_MSIZE_32 (2)
+#define STM_DMA_CCR_MSIZE_MASK (3)
+
+#define STM_DMA_CCR_PSIZE (8)
+#define STM_DMA_CCR_PSIZE_8 (0)
+#define STM_DMA_CCR_PSIZE_16 (1)
+#define STM_DMA_CCR_PSIZE_32 (2)
+#define STM_DMA_CCR_PSIZE_MASK (3)
+
+#define STM_DMA_CCR_MINC (7)
+#define STM_DMA_CCR_PINC (6)
+#define STM_DMA_CCR_CIRC (5)
+#define STM_DMA_CCR_DIR (4)
+#define STM_DMA_CCR_DIR_PER_TO_MEM 0
+#define STM_DMA_CCR_DIR_MEM_TO_PER 1
+#define STM_DMA_CCR_TEIE (3)
+#define STM_DMA_CCR_HTIE (2)
+#define STM_DMA_CCR_TCIE (1)
+#define STM_DMA_CCR_EN (0)
+
+/* DMA channel assignments. When a peripheral has multiple channels
+ * (indicated with _<number>), then it can be configured to either
+ * channel using syscfg.cfgr1
+ */
+
+#define STM_DMA_CHANNEL_ADC_1 1
+#define STM_DMA_CHANNEL_ADC_2 2
+
+#define STM_DMA_CHANNEL_SPI1_RX 2
+#define STM_DMA_CHANNEL_SPI1_TX 3
+
+#define STM_DMA_CHANNEL_SPI2_RX 4
+#define STM_DMA_CHANNEL_SPI2_TX 5
+
+#define STM_DMA_CHANNEL_USART1_TX_1 2
+#define STM_DMA_CHANNEL_USART1_RX_1 3
+#define STM_DMA_CHANNEL_USART1_TX_2 4
+#define STM_DMA_CHANNEL_USART1_RX_2 5
+
+#define STM_DMA_CHANNEL_USART2_RX 4
+#define STM_DMA_CHANNEL_USART2_TX 5
+
+#define STM_DMA_CHANNEL_I2C1_TX 2
+#define STM_DMA_CHANNEL_I2C1_RX 3
+
+#define STM_DMA_CHANNEL_I2C2_TX 4
+#define STM_DMA_CHANNEL_I2C2_RX 5
+
+#define STM_DMA_CHANNEL_TIM1_CH1 2
+#define STM_DMA_CHANNEL_TIM1_CH2 3
+#define STM_DMA_CHANNEL_TIM1_CH4 4
+#define STM_DMA_CHANNEL_TIM1_TRIG 4
+#define STM_DMA_CHANNEL_TIM1_COM 4
+#define STM_DMA_CHANNEL_TIM1_CH3 5
+#define STM_DMA_CHANNEL_TIM1_UP 5
+
+#define STM_DMA_CHANNEL_TIM2_CH3 1
+#define STM_DMA_CHANNEL_TIM2_UP 2
+#define STM_DMA_CHANNEL_TIM2_CH2 3
+#define STM_DMA_CHANNEL_TIM2_CH4 4
+#define STM_DMA_CHANNEL_TIM2_CH1 5
+
+#define STM_DMA_CHANNEL_TIM3_CH3 2
+#define STM_DMA_CHANNEL_TIM3_CH4 3
+#define STM_DMA_CHANNEL_TIM3_UP 3
+#define STM_DMA_CHANNEL_TIM3_CH1 4
+#define STM_DMA_CHANNEL_TIM3_TRIG 4
+
+#define STM_DMA_CHANNEL_TIM6_UP_DAC 2
+
+#define STM_DMA_CHANNEL_TIM15_CH1 5
+#define STM_DMA_CHANNEL_TIM15_UP 5
+#define STM_DMA_CHANNEL_TIM15_TRIG 5
+#define STM_DMA_CHANNEL_TIM15_COM 5
+
+#define STM_DMA_CHANNEL_TIM16_CH1_1 3
+#define STM_DMA_CHANNEL_TIM16_UP_1 3
+#define STM_DMA_CHANNEL_TIM16_CH1_2 4
+#define STM_DMA_CHANNEL_TIM16_UP_2 4
+
+#define STM_DMA_CHANNEL_TIM17_CH1_1 1
+#define STM_DMA_CHANNEL_TIM17_UP_1 1
+#define STM_DMA_CHANNEL_TIM17_CH1_2 2
+#define STM_DMA_CHANNEL_TIM17_UP_2 2
+
+/*
+ * Only spi channel 1 and 2 can use DMA
+ */
+#define STM_NUM_SPI 2
+
+struct stm_spi {
+ vuint32_t cr1;
+ vuint32_t cr2;
+ vuint32_t sr;
+ vuint32_t dr;
+ vuint32_t crcpr;
+ vuint32_t rxcrcr;
+ vuint32_t txcrcr;
+};
+
+extern struct stm_spi stm_spi1, stm_spi2, stm_spi3;
+
+/* SPI channels go from 1 to 3, instead of 0 to 2 (sigh)
+ */
+
+#define STM_SPI_INDEX(channel) ((channel) - 1)
+
+#define STM_SPI_CR1_BIDIMODE 15
+#define STM_SPI_CR1_BIDIOE 14
+#define STM_SPI_CR1_CRCEN 13
+#define STM_SPI_CR1_CRCNEXT 12
+#define STM_SPI_CR1_DFF 11
+#define STM_SPI_CR1_RXONLY 10
+#define STM_SPI_CR1_SSM 9
+#define STM_SPI_CR1_SSI 8
+#define STM_SPI_CR1_LSBFIRST 7
+#define STM_SPI_CR1_SPE 6
+#define STM_SPI_CR1_BR 3
+#define STM_SPI_CR1_BR_PCLK_2 0
+#define STM_SPI_CR1_BR_PCLK_4 1
+#define STM_SPI_CR1_BR_PCLK_8 2
+#define STM_SPI_CR1_BR_PCLK_16 3
+#define STM_SPI_CR1_BR_PCLK_32 4
+#define STM_SPI_CR1_BR_PCLK_64 5
+#define STM_SPI_CR1_BR_PCLK_128 6
+#define STM_SPI_CR1_BR_PCLK_256 7
+#define STM_SPI_CR1_BR_MASK 7
+
+#define STM_SPI_CR1_MSTR 2
+#define STM_SPI_CR1_CPOL 1
+#define STM_SPI_CR1_CPHA 0
+
+#define STM_SPI_CR2_TXEIE 7
+#define STM_SPI_CR2_RXNEIE 6
+#define STM_SPI_CR2_ERRIE 5
+#define STM_SPI_CR2_SSOE 2
+#define STM_SPI_CR2_TXDMAEN 1
+#define STM_SPI_CR2_RXDMAEN 0
+
+#define STM_SPI_SR_BSY 7
+#define STM_SPI_SR_OVR 6
+#define STM_SPI_SR_MODF 5
+#define STM_SPI_SR_CRCERR 4
+#define STM_SPI_SR_TXE 1
+#define STM_SPI_SR_RXNE 0
+
+struct stm_adc {
+ vuint32_t isr;
+ vuint32_t ier;
+ vuint32_t cr;
+ vuint32_t cfgr1;
+
+ vuint32_t cfgr2;
+ vuint32_t smpr;
+ vuint32_t r_18;
+ vuint32_t r_1c;
+
+ vuint32_t tr;
+ vuint32_t r_24;
+ vuint32_t chselr;
+ vuint32_t r_2c;
+
+ vuint32_t r_30[4];
+
+ vuint32_t dr;
+
+ uint8_t r_44[0x308 - 0x44];
+ vuint32_t ccr;
+};
+
+extern struct stm_adc stm_adc;
+
+#define STM_ADC_ISR_AWD 7
+#define STM_ADC_ISR_OVR 4
+#define STM_ADC_ISR_EOSEQ 3
+#define STM_ADC_ISR_EOC 2
+#define STM_ADC_ISR_EOSMP 1
+#define STM_ADC_ISR_ADRDY 0
+
+#define STM_ADC_IER_AWDIE 7
+#define STM_ADC_IER_OVRIE 4
+#define STM_ADC_IER_EOSEQIE 3
+#define STM_ADC_IER_EOCIE 2
+#define STM_ADC_IER_EOSMPIE 1
+#define STM_ADC_IER_ADRDYIE 0
+
+#define STM_ADC_CR_ADCAL 31
+#define STM_ADC_CR_ADSTP 4
+#define STM_ADC_CR_ADSTART 2
+#define STM_ADC_CR_ADDIS 1
+#define STM_ADC_CR_ADEN 0
+
+#define STM_ADC_CFGR1_AWDCH 26
+#define STM_ADC_CFGR1_AWDEN 23
+#define STM_ADC_CFGR1_AWDSGL 22
+#define STM_ADC_CFGR1_DISCEN 16
+#define STM_ADC_CFGR1_AUTOOFF 15
+#define STM_ADC_CFGR1_WAIT 14
+#define STM_ADC_CFGR1_CONT 13
+#define STM_ADC_CFGR1_OVRMOD 12
+#define STM_ADC_CFGR1_EXTEN 10
+#define STM_ADC_CFGR1_EXTEN_DISABLE 0
+#define STM_ADC_CFGR1_EXTEN_RISING 1
+#define STM_ADC_CFGR1_EXTEN_FALLING 2
+#define STM_ADC_CFGR1_EXTEN_BOTH 3
+#define STM_ADC_CFGR1_EXTEN_MASK 3
+
+#define STM_ADC_CFGR1_EXTSEL 6
+#define STM_ADC_CFGR1_ALIGN 5
+#define STM_ADC_CFGR1_RES 3
+#define STM_ADC_CFGR1_RES_12 0
+#define STM_ADC_CFGR1_RES_10 1
+#define STM_ADC_CFGR1_RES_8 2
+#define STM_ADC_CFGR1_RES_6 3
+#define STM_ADC_CFGR1_RES_MASK 3
+#define STM_ADC_CFGR1_SCANDIR 2
+#define STM_ADC_CFGR1_SCANDIR_UP 0
+#define STM_ADC_CFGR1_SCANDIR_DOWN 1
+#define STM_ADC_CFGR1_DMACFG 1
+#define STM_ADC_CFGR1_DMACFG_ONESHOT 0
+#define STM_ADC_CFGR1_DMACFG_CIRCULAR 1
+#define STM_ADC_CFGR1_DMAEN 0
+
+#define STM_ADC_CFGR2_CKMODE 30
+#define STM_ADC_CFGR2_CKMODE_ADCCLK 0
+#define STM_ADC_CFGR2_CKMODE_PCLK_2 1
+#define STM_ADC_CFGR2_CKMODE_PCLK_4 2
+
+#define STM_ADC_SMPR_SMP 0
+#define STM_ADC_SMPR_SMP_1_5 0
+#define STM_ADC_SMPR_SMP_7_5 1
+#define STM_ADC_SMPR_SMP_13_5 2
+#define STM_ADC_SMPR_SMP_28_5 3
+#define STM_ADC_SMPR_SMP_41_5 4
+#define STM_ADC_SMPR_SMP_55_5 5
+#define STM_ADC_SMPR_SMP_71_5 6
+#define STM_ADC_SMPR_SMP_239_5 7
+
+#define STM_ADC_TR_HT 16
+#define STM_ADC_TR_LT 0
+
+#define STM_ADC_CCR_VBATEN 24
+#define STM_ADC_CCR_TSEN 23
+#define STM_ADC_CCR_VREFEN 22
+
+struct stm_cal {
+ uint16_t ts_cal_cold; /* 30°C */
+ uint16_t vrefint_cal;
+ uint16_t unused_c0;
+ uint16_t ts_cal_hot; /* 110°C */
+};
+
+extern struct stm_cal stm_cal;
+
+#define stm_temp_cal_cold 30
+#define stm_temp_cal_hot 110
+
+struct stm_dbgmcu {
+ uint32_t idcode;
+};
+
+extern struct stm_dbgmcu stm_dbgmcu;
+
+static inline uint16_t
+stm_dev_id(void) {
+ return stm_dbgmcu.idcode & 0xfff;
+}
+
+struct stm_flash_size {
+ uint16_t f_size;
+};
+
+extern struct stm_flash_size stm_flash_size_04x;
+
+/* Returns flash size in bytes */
+extern uint32_t
+stm_flash_size(void);
+
+struct stm_device_id {
+ uint32_t u_id0;
+ uint32_t u_id1;
+ uint32_t u_id2;
+};
+
+extern struct stm_device_id stm_device_id;
+
+#define STM_NUM_I2C 2
+
+#define STM_I2C_INDEX(channel) ((channel) - 1)
+
+struct stm_i2c {
+ vuint32_t cr1;
+ vuint32_t cr2;
+ vuint32_t oar1;
+ vuint32_t oar2;
+ vuint32_t dr;
+ vuint32_t sr1;
+ vuint32_t sr2;
+ vuint32_t ccr;
+ vuint32_t trise;
+};
+
+extern struct stm_i2c stm_i2c1, stm_i2c2;
+
+#define STM_I2C_CR1_SWRST 15
+#define STM_I2C_CR1_ALERT 13
+#define STM_I2C_CR1_PEC 12
+#define STM_I2C_CR1_POS 11
+#define STM_I2C_CR1_ACK 10
+#define STM_I2C_CR1_STOP 9
+#define STM_I2C_CR1_START 8
+#define STM_I2C_CR1_NOSTRETCH 7
+#define STM_I2C_CR1_ENGC 6
+#define STM_I2C_CR1_ENPEC 5
+#define STM_I2C_CR1_ENARP 4
+#define STM_I2C_CR1_SMBTYPE 3
+#define STM_I2C_CR1_SMBUS 1
+#define STM_I2C_CR1_PE 0
+
+#define STM_I2C_CR2_LAST 12
+#define STM_I2C_CR2_DMAEN 11
+#define STM_I2C_CR2_ITBUFEN 10
+#define STM_I2C_CR2_ITEVTEN 9
+#define STM_I2C_CR2_ITERREN 8
+#define STM_I2C_CR2_FREQ 0
+#define STM_I2C_CR2_FREQ_2_MHZ 2
+#define STM_I2C_CR2_FREQ_4_MHZ 4
+#define STM_I2C_CR2_FREQ_8_MHZ 8
+#define STM_I2C_CR2_FREQ_16_MHZ 16
+#define STM_I2C_CR2_FREQ_32_MHZ 32
+#define STM_I2C_CR2_FREQ_MASK 0x3f
+
+#define STM_I2C_SR1_SMBALERT 15
+#define STM_I2C_SR1_TIMEOUT 14
+#define STM_I2C_SR1_PECERR 12
+#define STM_I2C_SR1_OVR 11
+#define STM_I2C_SR1_AF 10
+#define STM_I2C_SR1_ARLO 9
+#define STM_I2C_SR1_BERR 8
+#define STM_I2C_SR1_TXE 7
+#define STM_I2C_SR1_RXNE 6
+#define STM_I2C_SR1_STOPF 4
+#define STM_I2C_SR1_ADD10 3
+#define STM_I2C_SR1_BTF 2
+#define STM_I2C_SR1_ADDR 1
+#define STM_I2C_SR1_SB 0
+
+#define STM_I2C_SR2_PEC 8
+#define STM_I2C_SR2_PEC_MASK 0xff00
+#define STM_I2C_SR2_DUALF 7
+#define STM_I2C_SR2_SMBHOST 6
+#define STM_I2C_SR2_SMBDEFAULT 5
+#define STM_I2C_SR2_GENCALL 4
+#define STM_I2C_SR2_TRA 2
+#define STM_I2C_SR2_BUSY 1
+#define STM_I2C_SR2_MSL 0
+
+#define STM_I2C_CCR_FS 15
+#define STM_I2C_CCR_DUTY 14
+#define STM_I2C_CCR_CCR 0
+#define STM_I2C_CCR_MASK 0x7ff
+
+struct stm_tim234 {
+ vuint32_t cr1;
+ vuint32_t cr2;
+ vuint32_t smcr;
+ vuint32_t dier;
+
+ vuint32_t sr;
+ vuint32_t egr;
+ vuint32_t ccmr1;
+ vuint32_t ccmr2;
+
+ vuint32_t ccer;
+ vuint32_t cnt;
+ vuint32_t psc;
+ vuint32_t arr;
+
+ uint32_t reserved_30;
+ vuint32_t ccr1;
+ vuint32_t ccr2;
+ vuint32_t ccr3;
+
+ vuint32_t ccr4;
+ uint32_t reserved_44;
+ vuint32_t dcr;
+ vuint32_t dmar;
+
+ uint32_t reserved_50;
+};
+
+extern struct stm_tim234 stm_tim2, stm_tim3, stm_tim4;
+
+#define STM_TIM234_CR1_CKD 8
+#define STM_TIM234_CR1_CKD_1 0
+#define STM_TIM234_CR1_CKD_2 1
+#define STM_TIM234_CR1_CKD_4 2
+#define STM_TIM234_CR1_CKD_MASK 3
+#define STM_TIM234_CR1_ARPE 7
+#define STM_TIM234_CR1_CMS 5
+#define STM_TIM234_CR1_CMS_EDGE 0
+#define STM_TIM234_CR1_CMS_CENTER_1 1
+#define STM_TIM234_CR1_CMS_CENTER_2 2
+#define STM_TIM234_CR1_CMS_CENTER_3 3
+#define STM_TIM234_CR1_CMS_MASK 3
+#define STM_TIM234_CR1_DIR 4
+#define STM_TIM234_CR1_DIR_UP 0
+#define STM_TIM234_CR1_DIR_DOWN 1
+#define STM_TIM234_CR1_OPM 3
+#define STM_TIM234_CR1_URS 2
+#define STM_TIM234_CR1_UDIS 1
+#define STM_TIM234_CR1_CEN 0
+
+#define STM_TIM234_CR2_TI1S 7
+#define STM_TIM234_CR2_MMS 4
+#define STM_TIM234_CR2_MMS_RESET 0
+#define STM_TIM234_CR2_MMS_ENABLE 1
+#define STM_TIM234_CR2_MMS_UPDATE 2
+#define STM_TIM234_CR2_MMS_COMPARE_PULSE 3
+#define STM_TIM234_CR2_MMS_COMPARE_OC1REF 4
+#define STM_TIM234_CR2_MMS_COMPARE_OC2REF 5
+#define STM_TIM234_CR2_MMS_COMPARE_OC3REF 6
+#define STM_TIM234_CR2_MMS_COMPARE_OC4REF 7
+#define STM_TIM234_CR2_MMS_MASK 7
+#define STM_TIM234_CR2_CCDS 3
+
+#define STM_TIM234_SMCR_ETP 15
+#define STM_TIM234_SMCR_ECE 14
+#define STM_TIM234_SMCR_ETPS 12
+#define STM_TIM234_SMCR_ETPS_OFF 0
+#define STM_TIM234_SMCR_ETPS_DIV_2 1
+#define STM_TIM234_SMCR_ETPS_DIV_4 2
+#define STM_TIM234_SMCR_ETPS_DIV_8 3
+#define STM_TIM234_SMCR_ETPS_MASK 3
+#define STM_TIM234_SMCR_ETF 8
+#define STM_TIM234_SMCR_ETF_NONE 0
+#define STM_TIM234_SMCR_ETF_INT_N_2 1
+#define STM_TIM234_SMCR_ETF_INT_N_4 2
+#define STM_TIM234_SMCR_ETF_INT_N_8 3
+#define STM_TIM234_SMCR_ETF_DTS_2_N_6 4
+#define STM_TIM234_SMCR_ETF_DTS_2_N_8 5
+#define STM_TIM234_SMCR_ETF_DTS_4_N_6 6
+#define STM_TIM234_SMCR_ETF_DTS_4_N_8 7
+#define STM_TIM234_SMCR_ETF_DTS_8_N_6 8
+#define STM_TIM234_SMCR_ETF_DTS_8_N_8 9
+#define STM_TIM234_SMCR_ETF_DTS_16_N_5 10
+#define STM_TIM234_SMCR_ETF_DTS_16_N_6 11
+#define STM_TIM234_SMCR_ETF_DTS_16_N_8 12
+#define STM_TIM234_SMCR_ETF_DTS_32_N_5 13
+#define STM_TIM234_SMCR_ETF_DTS_32_N_6 14
+#define STM_TIM234_SMCR_ETF_DTS_32_N_8 15
+#define STM_TIM234_SMCR_ETF_MASK 15
+#define STM_TIM234_SMCR_MSM 7
+#define STM_TIM234_SMCR_TS 4
+#define STM_TIM234_SMCR_TS_ITR0 0
+#define STM_TIM234_SMCR_TS_ITR1 1
+#define STM_TIM234_SMCR_TS_ITR2 2
+#define STM_TIM234_SMCR_TS_ITR3 3
+#define STM_TIM234_SMCR_TS_TI1F_ED 4
+#define STM_TIM234_SMCR_TS_TI1FP1 5
+#define STM_TIM234_SMCR_TS_TI2FP2 6
+#define STM_TIM234_SMCR_TS_ETRF 7
+#define STM_TIM234_SMCR_TS_MASK 7
+#define STM_TIM234_SMCR_OCCS 3
+#define STM_TIM234_SMCR_SMS 0
+#define STM_TIM234_SMCR_SMS_DISABLE 0
+#define STM_TIM234_SMCR_SMS_ENCODER_MODE_1 1
+#define STM_TIM234_SMCR_SMS_ENCODER_MODE_2 2
+#define STM_TIM234_SMCR_SMS_ENCODER_MODE_3 3
+#define STM_TIM234_SMCR_SMS_RESET_MODE 4
+#define STM_TIM234_SMCR_SMS_GATED_MODE 5
+#define STM_TIM234_SMCR_SMS_TRIGGER_MODE 6
+#define STM_TIM234_SMCR_SMS_EXTERNAL_CLOCK 7
+#define STM_TIM234_SMCR_SMS_MASK 7
+
+#define STM_TIM234_SR_CC4OF 12
+#define STM_TIM234_SR_CC3OF 11
+#define STM_TIM234_SR_CC2OF 10
+#define STM_TIM234_SR_CC1OF 9
+#define STM_TIM234_SR_TIF 6
+#define STM_TIM234_SR_CC4IF 4
+#define STM_TIM234_SR_CC3IF 3
+#define STM_TIM234_SR_CC2IF 2
+#define STM_TIM234_SR_CC1IF 1
+#define STM_TIM234_SR_UIF 0
+
+#define STM_TIM234_EGR_TG 6
+#define STM_TIM234_EGR_CC4G 4
+#define STM_TIM234_EGR_CC3G 3
+#define STM_TIM234_EGR_CC2G 2
+#define STM_TIM234_EGR_CC1G 1
+#define STM_TIM234_EGR_UG 0
+
+#define STM_TIM234_CCMR1_OC2CE 15
+#define STM_TIM234_CCMR1_OC2M 12
+#define STM_TIM234_CCMR1_OC2M_FROZEN 0
+#define STM_TIM234_CCMR1_OC2M_SET_HIGH_ON_MATCH 1
+#define STM_TIM234_CCMR1_OC2M_SET_LOW_ON_MATCH 2
+#define STM_TIM234_CCMR1_OC2M_TOGGLE 3
+#define STM_TIM234_CCMR1_OC2M_FORCE_LOW 4
+#define STM_TIM234_CCMR1_OC2M_FORCE_HIGH 5
+#define STM_TIM234_CCMR1_OC2M_PWM_MODE_1 6
+#define STM_TIM234_CCMR1_OC2M_PWM_MODE_2 7
+#define STM_TIM234_CCMR1_OC2M_MASK 7
+#define STM_TIM234_CCMR1_OC2PE 11
+#define STM_TIM234_CCMR1_OC2FE 10
+#define STM_TIM234_CCMR1_CC2S 8
+#define STM_TIM234_CCMR1_CC2S_OUTPUT 0
+#define STM_TIM234_CCMR1_CC2S_INPUT_TI2 1
+#define STM_TIM234_CCMR1_CC2S_INPUT_TI1 2
+#define STM_TIM234_CCMR1_CC2S_INPUT_TRC 3
+#define STM_TIM234_CCMR1_CC2S_MASK 3
+
+#define STM_TIM234_CCMR1_OC1CE 7
+#define STM_TIM234_CCMR1_OC1M 4
+#define STM_TIM234_CCMR1_OC1M_FROZEN 0
+#define STM_TIM234_CCMR1_OC1M_SET_HIGH_ON_MATCH 1
+#define STM_TIM234_CCMR1_OC1M_SET_LOW_ON_MATCH 2
+#define STM_TIM234_CCMR1_OC1M_TOGGLE 3
+#define STM_TIM234_CCMR1_OC1M_FORCE_LOW 4
+#define STM_TIM234_CCMR1_OC1M_FORCE_HIGH 5
+#define STM_TIM234_CCMR1_OC1M_PWM_MODE_1 6
+#define STM_TIM234_CCMR1_OC1M_PWM_MODE_2 7
+#define STM_TIM234_CCMR1_OC1M_MASK 7
+#define STM_TIM234_CCMR1_OC1PE 11
+#define STM_TIM234_CCMR1_OC1FE 2
+#define STM_TIM234_CCMR1_CC1S 0
+#define STM_TIM234_CCMR1_CC1S_OUTPUT 0
+#define STM_TIM234_CCMR1_CC1S_INPUT_TI1 1
+#define STM_TIM234_CCMR1_CC1S_INPUT_TI2 2
+#define STM_TIM234_CCMR1_CC1S_INPUT_TRC 3
+#define STM_TIM234_CCMR1_CC1S_MASK 3
+
+#define STM_TIM234_CCMR2_OC4CE 15
+#define STM_TIM234_CCMR2_OC4M 12
+#define STM_TIM234_CCMR2_OC4M_FROZEN 0
+#define STM_TIM234_CCMR2_OC4M_SET_HIGH_ON_MATCH 1
+#define STM_TIM234_CCMR2_OC4M_SET_LOW_ON_MATCH 2
+#define STM_TIM234_CCMR2_OC4M_TOGGLE 3
+#define STM_TIM234_CCMR2_OC4M_FORCE_LOW 4
+#define STM_TIM234_CCMR2_OC4M_FORCE_HIGH 5
+#define STM_TIM234_CCMR2_OC4M_PWM_MODE_1 6
+#define STM_TIM234_CCMR2_OC4M_PWM_MODE_2 7
+#define STM_TIM234_CCMR2_OC4M_MASK 7
+#define STM_TIM234_CCMR2_OC4PE 11
+#define STM_TIM234_CCMR2_OC4FE 10
+#define STM_TIM234_CCMR2_CC4S 8
+#define STM_TIM234_CCMR2_CC4S_OUTPUT 0
+#define STM_TIM234_CCMR2_CC4S_INPUT_TI4 1
+#define STM_TIM234_CCMR2_CC4S_INPUT_TI3 2
+#define STM_TIM234_CCMR2_CC4S_INPUT_TRC 3
+#define STM_TIM234_CCMR2_CC4S_MASK 3
+
+#define STM_TIM234_CCMR2_OC3CE 7
+#define STM_TIM234_CCMR2_OC3M 4
+#define STM_TIM234_CCMR2_OC3M_FROZEN 0
+#define STM_TIM234_CCMR2_OC3M_SET_HIGH_ON_MATCH 1
+#define STM_TIM234_CCMR2_OC3M_SET_LOW_ON_MATCH 2
+#define STM_TIM234_CCMR2_OC3M_TOGGLE 3
+#define STM_TIM234_CCMR2_OC3M_FORCE_LOW 4
+#define STM_TIM234_CCMR2_OC3M_FORCE_HIGH 5
+#define STM_TIM234_CCMR2_OC3M_PWM_MODE_1 6
+#define STM_TIM234_CCMR2_OC3M_PWM_MODE_2 7
+#define STM_TIM234_CCMR2_OC3M_MASK 7
+#define STM_TIM234_CCMR2_OC3PE 11
+#define STM_TIM234_CCMR2_OC3FE 2
+#define STM_TIM234_CCMR2_CC3S 0
+#define STM_TIM234_CCMR2_CC3S_OUTPUT 0
+#define STM_TIM234_CCMR2_CC3S_INPUT_TI3 1
+#define STM_TIM234_CCMR2_CC3S_INPUT_TI4 2
+#define STM_TIM234_CCMR2_CC3S_INPUT_TRC 3
+#define STM_TIM234_CCMR2_CC3S_MASK 3
+
+#define STM_TIM234_CCER_CC4NP 15
+#define STM_TIM234_CCER_CC4P 13
+#define STM_TIM234_CCER_CC4E 12
+#define STM_TIM234_CCER_CC3NP 11
+#define STM_TIM234_CCER_CC3P 9
+#define STM_TIM234_CCER_CC3E 8
+#define STM_TIM234_CCER_CC2NP 7
+#define STM_TIM234_CCER_CC2P 5
+#define STM_TIM234_CCER_CC2E 4
+#define STM_TIM234_CCER_CC1NP 3
+#define STM_TIM234_CCER_CC1P 1
+#define STM_TIM234_CCER_CC1E 0
+
+struct stm_usb {
+ struct {
+ vuint16_t r;
+ uint16_t _;
+ } epr[8];
+ uint8_t reserved_20[0x40 - 0x20];
+ vuint16_t cntr;
+ uint16_t reserved_42;
+ vuint16_t istr;
+ uint16_t reserved_46;
+ vuint16_t fnr;
+ uint16_t reserved_4a;
+ vuint16_t daddr;
+ uint16_t reserved_4e;
+ vuint16_t btable;
+ uint16_t reserved_52;
+ vuint16_t lpmcsr;
+ uint16_t reserved_56;
+ vuint16_t bcdr;
+ uint16_t reserved_5a;
+};
+
+extern struct stm_usb stm_usb;
+
+#define STM_USB_EPR_CTR_RX 15
+#define STM_USB_EPR_CTR_RX_WRITE_INVARIANT 1
+#define STM_USB_EPR_DTOG_RX 14
+#define STM_USB_EPR_DTOG_RX_WRITE_INVARIANT 0
+#define STM_USB_EPR_STAT_RX 12
+#define STM_USB_EPR_STAT_RX_DISABLED 0
+#define STM_USB_EPR_STAT_RX_STALL 1
+#define STM_USB_EPR_STAT_RX_NAK 2
+#define STM_USB_EPR_STAT_RX_VALID 3
+#define STM_USB_EPR_STAT_RX_MASK 3
+#define STM_USB_EPR_STAT_RX_WRITE_INVARIANT 0
+#define STM_USB_EPR_SETUP 11
+#define STM_USB_EPR_EP_TYPE 9
+#define STM_USB_EPR_EP_TYPE_BULK 0
+#define STM_USB_EPR_EP_TYPE_CONTROL 1
+#define STM_USB_EPR_EP_TYPE_ISO 2
+#define STM_USB_EPR_EP_TYPE_INTERRUPT 3
+#define STM_USB_EPR_EP_TYPE_MASK 3
+#define STM_USB_EPR_EP_KIND 8
+#define STM_USB_EPR_EP_KIND_DBL_BUF 1 /* Bulk */
+#define STM_USB_EPR_EP_KIND_STATUS_OUT 1 /* Control */
+#define STM_USB_EPR_CTR_TX 7
+#define STM_USB_CTR_TX_WRITE_INVARIANT 1
+#define STM_USB_EPR_DTOG_TX 6
+#define STM_USB_EPR_DTOG_TX_WRITE_INVARIANT 0
+#define STM_USB_EPR_STAT_TX 4
+#define STM_USB_EPR_STAT_TX_DISABLED 0
+#define STM_USB_EPR_STAT_TX_STALL 1
+#define STM_USB_EPR_STAT_TX_NAK 2
+#define STM_USB_EPR_STAT_TX_VALID 3
+#define STM_USB_EPR_STAT_TX_WRITE_INVARIANT 0
+#define STM_USB_EPR_STAT_TX_MASK 3
+#define STM_USB_EPR_EA 0
+#define STM_USB_EPR_EA_MASK 0xf
+
+#define STM_USB_CNTR_CTRM 15
+#define STM_USB_CNTR_PMAOVRM 14
+#define STM_USB_CNTR_ERRM 13
+#define STM_USB_CNTR_WKUPM 12
+#define STM_USB_CNTR_SUSPM 11
+#define STM_USB_CNTR_RESETM 10
+#define STM_USB_CNTR_SOFM 9
+#define STM_USB_CNTR_ESOFM 8
+#define STM_USB_CNTR_RESUME 4
+#define STM_USB_CNTR_FSUSP 3
+#define STM_USB_CNTR_LP_MODE 2
+#define STM_USB_CNTR_PDWN 1
+#define STM_USB_CNTR_FRES 0
+
+#define STM_USB_ISTR_CTR 15
+#define STM_USB_ISTR_PMAOVR 14
+#define STM_USB_ISTR_ERR 13
+#define STM_USB_ISTR_WKUP 12
+#define STM_USB_ISTR_SUSP 11
+#define STM_USB_ISTR_RESET 10
+#define STM_USB_ISTR_SOF 9
+#define STM_USB_ISTR_ESOF 8
+#define STM_USB_L1REQ 7
+#define STM_USB_ISTR_DIR 4
+#define STM_USB_ISTR_EP_ID 0
+#define STM_USB_ISTR_EP_ID_MASK 0xf
+
+#define STM_USB_FNR_RXDP 15
+#define STM_USB_FNR_RXDM 14
+#define STM_USB_FNR_LCK 13
+#define STM_USB_FNR_LSOF 11
+#define STM_USB_FNR_LSOF_MASK 0x3
+#define STM_USB_FNR_FN 0
+#define STM_USB_FNR_FN_MASK 0x7ff
+
+#define STM_USB_DADDR_EF 7
+#define STM_USB_DADDR_ADD 0
+#define STM_USB_DADDR_ADD_MASK 0x7f
+
+#define STM_USB_BCDR_DPPU 15
+#define STM_USB_BCDR_PS2DET 7
+#define STM_USB_BCDR_SDET 6
+#define STM_USB_BCDR_PDET 5
+#define STM_USB_BCDR_DCDET 4
+#define STM_USB_BCDR_SDEN 3
+#define STM_USB_BCDR_PDEN 2
+#define STM_USB_BCDR_DCDEN 1
+#define STM_USB_BCDR_BCDEN 0
+
+union stm_usb_bdt {
+ struct {
+ vuint16_t addr_tx;
+ vuint16_t count_tx;
+ vuint16_t addr_rx;
+ vuint16_t count_rx;
+ } single;
+ struct {
+ vuint16_t addr;
+ vuint16_t count;
+ } double_tx[2];
+ struct {
+ vuint16_t addr;
+ vuint16_t count;
+ } double_rx[2];
+};
+
+#define STM_USB_BDT_COUNT_RX_BL_SIZE 15
+#define STM_USB_BDT_COUNT_RX_NUM_BLOCK 10
+#define STM_USB_BDT_COUNT_RX_NUM_BLOCK_MASK 0x1f
+#define STM_USB_BDT_COUNT_RX_COUNT_RX 0
+#define STM_USB_BDT_COUNT_RX_COUNT_RX_MASK 0x1ff
+
+#define STM_USB_BDT_SIZE 8
+
+extern uint8_t stm_usb_sram[];
+
+struct stm_exti {
+ vuint32_t imr;
+ vuint32_t emr;
+ vuint32_t rtsr;
+ vuint32_t ftsr;
+
+ vuint32_t swier;
+ vuint32_t pr;
+};
+
+extern struct stm_exti stm_exti;
+
+#endif /* _STM32F0_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-17 16:02:37 +0000