Add STM self-flashing loader

This allows the real application to get loaded at 0x2000 and jumps to
that at startup time if the boot pin is set appropriately

Signed-off-by: Keith Packard <keithp@keithp.com>

3 files changed, 159 insertions, 0 deletions

diff --git a/src/stm-flash/Makefile b/src/stm-flash/Makefile
new file mode 100644
index 00000000..fbc6603d
--- /dev/null
+++ b/src/stm-flash/Makefile
@@ -0,0 +1,60 @@
+#
+# AltOS build
+#
+#
+
+include ../stm/Makefile.defs
+
+INC = \
+	ao.h \
+	ao_arch.h \
+	ao_arch_funcs.h \
+	ao_pins.h \
+	ao_product.h
+
+#
+# Common AltOS sources
+#
+ALTOS_SRC = \
+	ao_interrupt.c \
+	ao_product.c \
+	ao_romconfig.c \
+	ao_task.c \
+	ao_timer.c \
+	ao_mutex.c \
+	ao_usb_stm.c \
+	ao_stdio.c \
+	ao_cmd.c
+
+PRODUCT=StmFlash-v0.0
+PRODUCT_DEF=-DSTM_FLASH
+IDPRODUCT=0x000a
+
+CFLAGS = $(PRODUCT_DEF) $(STM_CFLAGS) -g -Os
+
+PROG=stm-flash
+
+SRC=$(ALTOS_SRC) ao_stm_flash.c
+OBJ=$(SRC:.c=.o)
+
+all: $(PROG)
+
+LDFLAGS=-L../stm -Wl,-Taltos-loader.ld
+
+$(PROG): Makefile $(OBJ)
+	$(call quiet,CC) $(LDFLAGS) $(CFLAGS) -o $(PROG) $(OBJ) $(SAT_CLIB) -lgcc
+
+ao_product.h: ao-make-product.5c ../Version
+	$(call quiet,NICKLE,$<) $< -m altusmetrum.org -i $(IDPRODUCT) -p $(PRODUCT) -v $(VERSION) > $@
+
+$(OBJ): $(INC)
+
+distclean:	clean
+
+clean:
+	rm -f *.o $(PROG)
+	rm -f ao_product.h
+
+install:
+
+uninstall:
diff --git a/src/stm-flash/ao_pins.h b/src/stm-flash/ao_pins.h
new file mode 100644
index 00000000..b232f373
--- /dev/null
+++ b/src/stm-flash/ao_pins.h
@@ -0,0 +1,71 @@
+/*
+ * 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_PINS_H_
+#define _AO_PINS_H_
+
+#define HAS_TASK_QUEUE		0
+
+#define AO_HSE			8000000
+
+/* PLLVCO = 96MHz (so that USB will work) */
+#define AO_PLLMUL		12
+#define AO_RCC_CFGR_PLLMUL	(STM_RCC_CFGR_PLLMUL_12)
+
+/* SYSCLK = 32MHz */
+#define AO_PLLDIV		3
+#define AO_RCC_CFGR_PLLDIV	(STM_RCC_CFGR_PLLDIV_3)
+
+/* HCLK = 32MHZ (CPU clock) */
+#define AO_AHB_PRESCALER	1
+#define AO_RCC_CFGR_HPRE_DIV	STM_RCC_CFGR_HPRE_DIV_1
+
+/* Run APB1 at HCLK/1 */
+#define AO_APB1_PRESCALER	1
+#define AO_RCC_CFGR_PPRE1_DIV	STM_RCC_CFGR_PPRE2_DIV_1
+
+/* Run APB2 at HCLK/1 */
+#define AO_APB2_PRESCALER      	1
+#define AO_RCC_CFGR_PPRE2_DIV	STM_RCC_CFGR_PPRE2_DIV_1
+
+#define HAS_USB			1
+#define USE_USB_STDIN		1
+#define HAS_BEEP		0
+
+#define PACKET_HAS_SLAVE	0
+
+#define LED_PORT_ENABLE		STM_RCC_AHBENR_GPIOCEN
+#define LED_PORT		(&stm_gpioc)
+#define LED_PIN_RED		8
+#define LED_PIN_GREEN		9
+#define AO_LED_RED		(1 << LED_PIN_RED)
+#define AO_LED_GREEN		(1 << LED_PIN_GREEN)
+
+#define LEDS_AVAILABLE		(AO_LED_RED | AO_LED_GREEN)
+
+#define AO_TICK_TYPE		uint32_t
+#define AO_TICK_SIGNED		int32_t
+
+#define HAS_TASK_INFO		0
+
+#define AO_BOOT_APPLICATION_GPIO	stm_gpiob
+#define AO_BOOT_APPLICATION_PIN		5
+#define AO_BOOT_APPLICATION_VALUE	0
+#define AO_BOOT_APPLICATION_MODE	AO_EXTI_MODE_PULL_UP
+#define AO_BOOT_APPLICATION_BASE	0x2000
+
+#endif /* _AO_PINS_H_ */
diff --git a/src/stm-flash/ao_stm_flash.c b/src/stm-flash/ao_stm_flash.c
index df466d85..81ae86df 100644
--- a/src/stm-flash/ao_stm_flash.c
+++ b/src/stm-flash/ao_stm_flash.c
@@ -17,6 +17,7 @@
 
 #include "ao.h"
 #include <ao_exti.h>
+<<<<<<< HEAD
 #include <ao_boot.h>
 #include <ao_flash_stm.h>
 
@@ -117,21 +118,48 @@ __code struct ao_cmds ao_flash_cmds[] = {
 	{ ao_block_read, "R <addr>\0Read block. Returns 256 bytes" },
 	{ 0, NULL },
 };
+=======
+
+void
+ao_panic(uint8_t c)
+{
+}
+
+void
+ao_test(void)
+{
+	char	c;
+
+	for (;;) {
+		c = ao_usb_getchar();
+		ao_usb_putchar(c);
+		ao_usb_flush();
+	}
+}
+
+struct ao_task ao_test_task;
+>>>>>>> 5187bb4... Add STM self-flashing loader
 
 int
 main(void)
 {
 	ao_clock_init();
+<<<<<<< HEAD
 
 	ao_task_init();
 
+=======
+>>>>>>> 5187bb4... Add STM self-flashing loader
 	ao_timer_init();
 //	ao_dma_init();
 	ao_cmd_init();
 //	ao_exti_init();
 	ao_usb_init();
 
+<<<<<<< HEAD
 	ao_cmd_register(&ao_flash_cmds[0]);
+=======
+>>>>>>> 5187bb4... Add STM self-flashing loader
 	ao_start_scheduler();
 	return 0;
 }