diff options
| -rw-r--r-- | src/micropeak-v2.0/.gitignore | 3 | ||||
| -rw-r--r-- | src/micropeak-v2.0/Makefile | 100 | ||||
| -rw-r--r-- | src/micropeak-v2.0/ao_micropeak.c | 278 | ||||
| -rw-r--r-- | src/micropeak-v2.0/ao_pins.h | 144 | ||||
| -rw-r--r-- | src/micropeak-v2.0/flash-loader/.gitignore | 2 | ||||
| -rw-r--r-- | src/micropeak-v2.0/flash-loader/Makefile | 8 | ||||
| -rw-r--r-- | src/micropeak-v2.0/flash-loader/ao_pins.h | 37 | ||||
| -rw-r--r-- | src/micropeak-v2.0/micropeak.ld | 123 |
8 files changed, 695 insertions, 0 deletions
diff --git a/src/micropeak-v2.0/.gitignore b/src/micropeak-v2.0/.gitignore new file mode 100644 index 00000000..c2062c34 --- /dev/null +++ b/src/micropeak-v2.0/.gitignore @@ -0,0 +1,3 @@ +ao_product.h +microsplash-v* +microsplash-load diff --git a/src/micropeak-v2.0/Makefile b/src/micropeak-v2.0/Makefile new file mode 100644 index 00000000..32154fa6 --- /dev/null +++ b/src/micropeak-v2.0/Makefile @@ -0,0 +1,100 @@ +# +# Tiny AltOS build +# +# + +include ../stmf0/Makefile.defs + +PUBLISH_DIR=$(HOME)/altusmetrumllc/Binaries +PUBLISH_HEX=$(PUBLISH_DIR)/$(HEX) + +MICRO_SRC=\ + ao_report_micro.c \ + ao_log_micro.c \ + ao_microflight.c \ + ao_microkalman.c + +ALTOS_SRC = \ + ao_micropeak.c \ + ao_spi_stm.c \ + ao_dma_stm.c \ + ao_led.c \ + ao_timer.c \ + ao_ms5607.c \ + ao_exti_stm.c \ + ao_convert_pa.c \ + ao_romconfig.c \ + ao_product.c \ + ao_panic.c \ + ao_stdio.c \ + ao_serial_stm.c \ + ao_usb_stm.c \ + ao_mutex.c \ + ao_interrupt.c \ + ao_cmd.c \ + ao_task.c \ + ao_data.c \ + ao_boot_chain.c \ + ao_microflight.c \ + ao_report_micro.c \ + ao_storage_stm.c \ + ao_storage.c \ + ao_log_micro.c \ + ao_microkalman.c + +INC=\ + ao.h \ + ao_pins.h \ + ao_arch.h \ + ao_arch_funcs.h \ + ao_exti.h \ + ao_ms5607.h \ + ao_log_micro.h \ + ao_micropeak.h \ + altitude-pa.h \ + stm32f0.h + +IDPRODUCT=0x14 +PRODUCT=MicroPeak-v2.0 +PRODUCT_DEF=-DMICROPEAK + +CFLAGS = $(PRODUCT_DEF) $(STMF0_CFLAGS) -g -Os + +PROGNAME=micropeak-v2.0 +PROG=$(PROGNAME)-$(VERSION).elf +HEX=$(PROGNAME)-$(VERSION).ihx + +SRC=$(ALTOS_SRC) +OBJ=$(SRC:.c=.o) + +all: $(PROG) $(HEX) + +LDFLAGS=$(CFLAGS) -L$(TOPDIR)/stmf0 -Wl,-Tmicropeak.ld -n + +$(PROG): Makefile $(OBJ) micropeak.ld + $(call quiet,CC) $(LDFLAGS) $(CFLAGS) -o $(PROG) $(OBJ) $(LIBS) + +ao_product.h: ao-make-product.5c ../Version + $(call quiet,NICKLE,$<) $< -m altusmetrum.org -i $(IDPRODUCT) -p $(PRODUCT) -v $(VERSION) > $@ + +ao_product.o: ao_product.c ao_product.h + +distclean: clean + +clean: + rm -f *.o *.elf *.ihx + rm -f ao_product.h + +publish: $(PUBLISH_HEX) + +$(PUBLISH_HEX): $(HEX) + cp -a $(HEX) $@ + +../altitude-pa.h: make-altitude-pa + nickle $< > $@ + +install: + +uninstall: + +$(OBJ): ao_product.h $(INC) diff --git a/src/micropeak-v2.0/ao_micropeak.c b/src/micropeak-v2.0/ao_micropeak.c new file mode 100644 index 00000000..1cfa1209 --- /dev/null +++ b/src/micropeak-v2.0/ao_micropeak.c @@ -0,0 +1,278 @@ +/* + * Copyright © 2017 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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_micropeak.h> +#include <ao_report_micro.h> +#include <ao_log_micro.h> +#include <ao_storage.h> + +static struct ao_ms5607_value value; + +alt_t ground_alt, max_alt; +alt_t ao_max_height; + +void +ao_pa_get(void) +{ + ao_ms5607_sample(&ao_ms5607_current); + ao_ms5607_convert(&ao_ms5607_current, &value); + pa = value.pres; +} + +static void +ao_compute_height(void) +{ + ground_alt = ao_pa_to_altitude(pa_ground); + max_alt = ao_pa_to_altitude(pa_min); + ao_max_height = max_alt - ground_alt; +} + +static void +ao_pips(void) +{ + uint8_t i; + for (i = 0; i < 10; i++) { + ao_led_toggle(AO_LED_REPORT); + ao_delay(AO_MS_TO_TICKS(80)); + } + ao_delay(AO_MS_TO_TICKS(200)); +} + +void +ao_delay_until(uint16_t target) { + int16_t delay = target - ao_time(); + if (delay > 0) { + ao_sleep_for(ao_delay_until, delay); + } +} + +static struct ao_task mp_task; + +static void +ao_battery_disable(void) +{ + /* Disable */ + if (stm_adc.cr & (1 << STM_ADC_CR_ADEN)) { + stm_adc.cr |= (1 << STM_ADC_CR_ADDIS); + while (stm_adc.cr & (1 << STM_ADC_CR_ADDIS)) + ; + } + + /* Turn off everything */ + stm_adc.cr &= ~((1 << STM_ADC_CR_ADCAL) | + (1 << STM_ADC_CR_ADSTP) | + (1 << STM_ADC_CR_ADSTART) | + (1 << STM_ADC_CR_ADEN)); +} + +static void +ao_battery_init(void) +{ + stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_ADCEN); + + ao_battery_disable(); + + /* Configure */ + stm_adc.cfgr1 = ((0 << STM_ADC_CFGR1_AWDCH) | /* analog watchdog channel 0 */ + (0 << STM_ADC_CFGR1_AWDEN) | /* Disable analog watchdog */ + (0 << STM_ADC_CFGR1_AWDSGL) | /* analog watchdog on all channels */ + (0 << STM_ADC_CFGR1_DISCEN) | /* Not discontinuous mode. All channels converted with one trigger */ + (0 << STM_ADC_CFGR1_AUTOOFF) | /* Leave ADC running */ + (1 << STM_ADC_CFGR1_WAIT) | /* Wait for data to be read before next conversion */ + (0 << STM_ADC_CFGR1_CONT) | /* only one set of conversions per trigger */ + (1 << STM_ADC_CFGR1_OVRMOD) | /* overwrite on overrun */ + (STM_ADC_CFGR1_EXTEN_DISABLE << STM_ADC_CFGR1_EXTEN) | /* SW trigger */ + (0 << STM_ADC_CFGR1_ALIGN) | /* Align to LSB */ + (STM_ADC_CFGR1_RES_12 << STM_ADC_CFGR1_RES) | /* 12 bit resolution */ + (STM_ADC_CFGR1_SCANDIR_UP << STM_ADC_CFGR1_SCANDIR) | /* scan 0 .. n */ + (STM_ADC_CFGR1_DMACFG_ONESHOT << STM_ADC_CFGR1_DMACFG) | /* one set of conversions then stop */ + (1 << STM_ADC_CFGR1_DMAEN)); /* enable DMA */ + + /* 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_71_5 << STM_ADC_SMPR_SMP; + + /* Select Vref */ + stm_adc.chselr = 1 << 17; + + stm_adc.ccr = ((0 << STM_ADC_CCR_VBATEN) | + (0 << STM_ADC_CCR_TSEN) | + (1 << STM_ADC_CCR_VREFEN)); + + /* Calibrate */ + stm_adc.cr |= (1 << STM_ADC_CR_ADCAL); + while ((stm_adc.cr & (1 << STM_ADC_CR_ADCAL)) != 0) + ; + + /* Enable */ + stm_adc.cr |= (1 << STM_ADC_CR_ADEN); + while ((stm_adc.isr & (1 << STM_ADC_ISR_ADRDY)) == 0) + ; + + /* Clear any stale status bits */ + stm_adc.isr = 0; + + /* Turn on syscfg */ + stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN); +} + +static void +ao_battery_fini(void) +{ + /* Disable */ + ao_battery_disable(); + + /* Power down */ + stm_rcc.apb2enr &= ~(1 << STM_RCC_APB2ENR_ADCEN); +} + +static uint16_t +ao_battery_voltage(void) +{ + uint16_t vrefint; + + ao_battery_init(); + + stm_adc.cr |= (1 << STM_ADC_CR_ADSTART); + + while ((stm_adc.isr & (1 << STM_ADC_ISR_EOC)) == 0) + ao_arch_nop(); + + vrefint = stm_adc.dr; + + ao_battery_fini(); + + return 330 * stm_cal.vrefint_cal / vrefint; +} + + +uint8_t ao_on_battery; + +static void +ao_micropeak(void) +{ + ao_ms5607_setup(); + ao_storage_setup(); + + /* Give the person a second to get their finger out of the way */ + ao_delay(AO_MS_TO_TICKS(1000)); + + ao_pips(); + + ao_log_micro_restore(); + ao_compute_height(); + ao_report_altitude(); + ao_log_micro_dump(); + +#if BOOST_DELAY + ao_delay(BOOST_DELAY); +#endif + + ao_microflight(); + + ao_log_micro_save(); + ao_compute_height(); + ao_report_altitude(); + + ao_sleep(&ao_on_battery); +} + +static void +ao_show_bat(void) +{ + printf("battery: %u\n", ao_battery_voltage()); +} + +static struct ao_cmds mp_cmd[] = { + { ao_show_bat, "b\0Show battery voltage" }, + { 0 } +}; + +static void +ao_hsi_init(void) +{ + uint32_t cfgr; + + /* Disable all interrupts */ + stm_rcc.cir = 0; + + /* Enable prefetch */ + stm_flash.acr |= (1 << STM_FLASH_ACR_PRFTBE); + + /* 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; + + /* Clear reset flags */ + stm_rcc.csr |= (1 << STM_RCC_CSR_RMVF); +} + +void +main(void) +{ + if (ao_battery_voltage() < 320) + ao_on_battery = 1; + + /* Leave the system running on the HSI if we're on battery */ + if (!ao_on_battery) + ao_clock_init(); + else + ao_hsi_init(); + + ao_led_init(LEDS_AVAILABLE); + ao_task_init(); + ao_timer_init(); + ao_serial_init(); + stm_moder_set(&stm_gpioa, 2, STM_MODER_OUTPUT); + + ao_dma_init(); + ao_spi_init(); + ao_exti_init(); + + /* Leave USB disabled on battery */ + if (!ao_on_battery) { + ao_usb_init(); + ao_cmd_init(); + } + + ao_ms5607_init(); + + ao_storage_init(); + + ao_add_task(&mp_task, ao_micropeak, "micropeak"); + ao_cmd_register(mp_cmd); + ao_start_scheduler(); +} diff --git a/src/micropeak-v2.0/ao_pins.h b/src/micropeak-v2.0/ao_pins.h new file mode 100644 index 00000000..13a4fd10 --- /dev/null +++ b/src/micropeak-v2.0/ao_pins.h @@ -0,0 +1,144 @@ +/* + * 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. + */ + +#ifndef _AO_PINS_H_ +#define _AO_PINS_H_ + +extern uint8_t ao_on_battery; + +#define AO_SYSCLK (ao_on_battery ? STM_HSI_FREQ : 48000000) + +#define LED_PORT_ENABLE STM_RCC_AHBENR_IOPAEN +#define LED_PORT (&stm_gpioa) +#define LED_PIN_ORANGE 2 +#define AO_LED_ORANGE (1 << LED_PIN_ORANGE) +#define AO_LED_REPORT AO_LED_ORANGE +#define AO_LED_PANIC AO_LED_ORANGE + +#define LEDS_AVAILABLE (AO_LED_ORANGE) + +#define AO_POWER_MANAGEMENT 0 + +/* 48MHz clock based on USB */ +#define AO_HSI48 1 +/* Need HSI running to flash */ +#define AO_NEED_HSI 1 + +/* HCLK = 12MHz usb / 2MHz battery */ +#define AO_AHB_PRESCALER (ao_on_battery ? 16 : 1) +#define AO_RCC_CFGR_HPRE_DIV (ao_on_battery ? STM_RCC_CFGR_HPRE_DIV_16 : STM_RCC_CFGR_HPRE_DIV_1) + +/* APB = 12MHz usb / 2MHz battery */ +#define AO_APB_PRESCALER 1 +#define AO_RCC_CFGR_PPRE_DIV STM_RCC_CFGR_PPRE_DIV_1 + +#define HAS_USB 1 +#define AO_PA11_PA12_RMP 1 + +#define PACKET_HAS_SLAVE 0 +#define HAS_SERIAL_1 0 +#define HAS_SERIAL_2 1 +#define USE_SERIAL_2_STDIN 0 +#define HAS_SERIAL_SW_FLOW 0 +#define SERIAL_2_PA2_PA3 1 +#define SERIAL_2_PA14_PA15 0 +#define USE_SERIAL2_FLOW 0 +#define USE_SERIAL2_SW_FLOW 0 + +#define IS_FLASH_LOADER 0 + +#define HAS_MS5607 1 +#define HAS_MS5611 0 +#define HAS_MS5607_TASK 0 +#define HAS_EEPROM 0 +#define HAS_BEEP 0 + +/* Logging */ +#define LOG_INTERVAL 1 +#define SAMPLE_SLEEP AO_MS_TO_TICKS(100) +#define BOOST_DELAY AO_SEC_TO_TICKS(60) +#define AO_LOG_ID AO_LOG_ID_MICRO_PEAK2 + +/* Kalman filter */ + +#define AO_MK_STEP_100MS 1 +#define AO_MK_STEP_96MS 0 + +/* SPI */ +#define HAS_SPI_1 1 +#define SPI_1_PA5_PA6_PA7 1 +#define SPI_1_PB3_PB4_PB5 0 +#define SPI_1_OSPEEDR STM_OSPEEDR_MEDIUM + +#define HAS_SPI_2 0 + +/* MS5607 */ +#define HAS_MS5607 1 +#define HAS_MS5611 0 +#define AO_MS5607_PRIVATE_PINS 0 +#define AO_MS5607_CS_PORT (&stm_gpioa) +#define AO_MS5607_CS_PIN 4 +#define AO_MS5607_CS_MASK (1 << AO_MS5607_CS_PIN) +#define AO_MS5607_MISO_PORT (&stm_gpioa) +#define AO_MS5607_MISO_PIN 6 +#define AO_MS5607_MISO_MASK (1 << AO_MS5607_MISO_PIN) +#define AO_MS5607_SPI_INDEX AO_SPI_1_PA5_PA6_PA7 + +typedef int32_t alt_t; + +#define AO_ALT_VALUE(x) ((x) * (alt_t) 10) + +#define AO_DATA_RING 32 + +#define HAS_ADC 0 + +static inline void +ao_power_off(void) __attribute((noreturn)); + +static inline void +ao_power_off(void) { + for (;;) { + } +} + +extern alt_t ao_max_height; + +void ao_delay_until(uint16_t target); + +#define ao_async_stop() do { \ + ao_serial2_drain(); \ + stm_moder_set(&stm_gpioa, 2, STM_MODER_OUTPUT); \ + } while (0) + +#define ao_async_start() do { \ + stm_moder_set(&stm_gpioa, 2, STM_MODER_ALTERNATE); \ + ao_delay(AO_MS_TO_TICKS(100)); \ + } while (0) + +#define ao_async_byte(b) ao_serial2_putchar((char) (b)) + +#define ao_eeprom_read(pos, ptr, size) ao_storage_read(pos, ptr, size) +#define ao_eeprom_write(pos, ptr, size) ao_storage_write(pos, ptr, size) +#define MAX_LOG_OFFSET ao_storage_total + +extern uint32_t __flash__[]; +extern uint32_t __flash_end__[]; + +#define AO_BOOT_APPLICATION_BOUND ((uint32_t *) __flash__) +#define USE_STORAGE_CONFIG 0 + +#endif /* _AO_PINS_H_ */ diff --git a/src/micropeak-v2.0/flash-loader/.gitignore b/src/micropeak-v2.0/flash-loader/.gitignore new file mode 100644 index 00000000..43f0aa8d --- /dev/null +++ b/src/micropeak-v2.0/flash-loader/.gitignore @@ -0,0 +1,2 @@ +*.bin +*.elf diff --git a/src/micropeak-v2.0/flash-loader/Makefile b/src/micropeak-v2.0/flash-loader/Makefile new file mode 100644 index 00000000..4e30c1c6 --- /dev/null +++ b/src/micropeak-v2.0/flash-loader/Makefile @@ -0,0 +1,8 @@ +# +# AltOS flash loader build +# +# + +TOPDIR=../.. +HARDWARE=micropeak-v2.0 +include $(TOPDIR)/stmf0/Makefile-flash.defs diff --git a/src/micropeak-v2.0/flash-loader/ao_pins.h b/src/micropeak-v2.0/flash-loader/ao_pins.h new file mode 100644 index 00000000..196a8b1d --- /dev/null +++ b/src/micropeak-v2.0/flash-loader/ao_pins.h @@ -0,0 +1,37 @@ +/* + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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_ + +#include <ao_flash_stm_pins.h> + +/* LED anode (PA2) to 3.3 for boot mode */ + +#define AO_BOOT_PIN 1 +#define AO_BOOT_APPLICATION_GPIO stm_gpioa +#define AO_BOOT_APPLICATION_PIN 2 +#define AO_BOOT_APPLICATION_VALUE 0 +#define AO_BOOT_APPLICATION_MODE AO_EXTI_MODE_PULL_DOWN + +/* USB */ +#define HAS_USB 1 +#define AO_USB_DIRECTIO 0 +#define AO_PA11_PA12_RMP 1 + +#endif /* _AO_PINS_H_ */ diff --git a/src/micropeak-v2.0/micropeak.ld b/src/micropeak-v2.0/micropeak.ld new file mode 100644 index 00000000..77717e16 --- /dev/null +++ b/src/micropeak-v2.0/micropeak.ld @@ -0,0 +1,123 @@ +/* + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 = 20K + flash(rx) : ORIGIN = 0x08006000, LENGTH = 8K + 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 */ + } > rom + + .ARM.exidx : { + *(.ARM.exidx* .gnu.linkonce.armexidx.*) + } > rom + + .rodata : { + *(.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 + + /* 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__ = .; + *(.ramtext) + } >ram AT>rom + + /* Data -- relocated to RAM, but written to ROM + */ + .data : { + *(.data) /* initialized data */ + . = ALIGN(4); + __data_end__ = .; + } >ram AT>rom + + .bss : { + __bss_start__ = .; + *(.bss) + *(COMMON) + . = ALIGN(4); + __bss_end__ = .; + } >ram + + PROVIDE(end = .); + + PROVIDE(__flash__ = ORIGIN(flash)); + PROVIDE(__flash_end__ = ORIGIN(flash) + LENGTH(flash)); + + PROVIDE(__stack__ = ORIGIN(stack) + LENGTH(stack)); +} + +ENTRY(start); + + |