Commit 9e5ea4d7 authored by Damien George's avatar Damien George
Browse files

stmhal: Add flash write support and flash storage driver.

parent 8a9a31e5
......@@ -78,12 +78,12 @@ SRC_C = \
exti.c \
usrsw.c \
rtc.c \
flash.c \
storage.c \
sdcard.c \
# lcd.c \
# servo.c \
# flash.c \
# storage.c \
# accel.c \
# timer.c \
# audio.c \
......@@ -100,6 +100,8 @@ SRC_HAL = $(addprefix $(HAL_DIR)/src/,\
stm32f4xx_hal.c \
stm32f4xx_hal_cortex.c \
stm32f4xx_hal_dma.c \
stm32f4xx_hal_flash.c \
stm32f4xx_hal_flash_ex.c \
stm32f4xx_hal_gpio.c \
stm32f4xx_hal_pcd.c \
stm32f4xx_hal_rcc.c \
......
#include <stm32f4xx_hal.h>
#include "flash.h"
/* Base address of the Flash sectors */
#define ADDR_FLASH_SECTOR_0 ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbytes */
#define ADDR_FLASH_SECTOR_1 ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbytes */
#define ADDR_FLASH_SECTOR_2 ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbytes */
#define ADDR_FLASH_SECTOR_3 ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbytes */
#define ADDR_FLASH_SECTOR_4 ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbytes */
#define ADDR_FLASH_SECTOR_5 ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbytes */
#define ADDR_FLASH_SECTOR_6 ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbytes */
#define ADDR_FLASH_SECTOR_7 ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbytes */
#define ADDR_FLASH_SECTOR_8 ((uint32_t)0x08080000) /* Base @ of Sector 8, 128 Kbytes */
#define ADDR_FLASH_SECTOR_9 ((uint32_t)0x080A0000) /* Base @ of Sector 9, 128 Kbytes */
#define ADDR_FLASH_SECTOR_10 ((uint32_t)0x080C0000) /* Base @ of Sector 10, 128 Kbytes */
#define ADDR_FLASH_SECTOR_11 ((uint32_t)0x080E0000) /* Base @ of Sector 11, 128 Kbytes */
static const uint32_t flash_info_table[26] = {
ADDR_FLASH_SECTOR_0, FLASH_SECTOR_0,
ADDR_FLASH_SECTOR_1, FLASH_SECTOR_1,
ADDR_FLASH_SECTOR_2, FLASH_SECTOR_2,
ADDR_FLASH_SECTOR_3, FLASH_SECTOR_3,
ADDR_FLASH_SECTOR_4, FLASH_SECTOR_4,
ADDR_FLASH_SECTOR_5, FLASH_SECTOR_5,
ADDR_FLASH_SECTOR_6, FLASH_SECTOR_6,
ADDR_FLASH_SECTOR_7, FLASH_SECTOR_7,
ADDR_FLASH_SECTOR_8, FLASH_SECTOR_8,
ADDR_FLASH_SECTOR_9, FLASH_SECTOR_9,
ADDR_FLASH_SECTOR_10, FLASH_SECTOR_10,
ADDR_FLASH_SECTOR_11, FLASH_SECTOR_11,
ADDR_FLASH_SECTOR_11 + 0x20000, 0,
};
uint32_t flash_get_sector_info(uint32_t addr, uint32_t *start_addr, uint32_t *size) {
if (addr >= flash_info_table[0]) {
for (int i = 0; i < 24; i += 2) {
if (addr < flash_info_table[i + 2]) {
if (start_addr != NULL) {
*start_addr = flash_info_table[i];
}
if (size != NULL) {
*size = flash_info_table[i + 2] - flash_info_table[i];
}
return flash_info_table[i + 1];
}
}
}
return 0;
}
void flash_write(uint32_t flash_dest, const uint32_t *src, uint32_t num_word32) {
// check there is something to write
if (num_word32 == 0) {
return;
}
// unlock
HAL_FLASH_Unlock();
// Clear pending flags (if any)
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |
FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR);
// erase the sector(s)
FLASH_EraseInitTypeDef EraseInitStruct;
EraseInitStruct.TypeErase = TYPEERASE_SECTORS;
EraseInitStruct.VoltageRange = VOLTAGE_RANGE_3; // voltage range needs to be 2.7V to 3.6V
EraseInitStruct.Sector = flash_get_sector_info(flash_dest, NULL, NULL);
EraseInitStruct.NbSectors = flash_get_sector_info(flash_dest + 4 * num_word32 - 1, NULL, NULL) - EraseInitStruct.Sector + 1;
uint32_t SectorError = 0;
if (HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError) != HAL_OK) {
// error occurred during sector erase
return;
}
// program the flash word by word
for (int i = 0; i < num_word32; i++) {
if (HAL_FLASH_Program(TYPEPROGRAM_WORD, flash_dest, *src) != HAL_OK) {
// error occurred during flash write
return;
}
flash_dest += 4;
src += 1;
}
// lock the flash
HAL_FLASH_Lock();
}
uint32_t flash_get_sector_info(uint32_t addr, uint32_t *start_addr, uint32_t *size);
void flash_write(uint32_t flash_dest, const uint32_t *src, uint32_t num_word32);
......@@ -29,13 +29,13 @@
#include "usrsw.h"
#include "usb.h"
#include "rtc.h"
#include "storage.h"
#include "sdcard.h"
#if 0
#include "ff.h"
#include "lexerfatfs.h"
#include "servo.h"
#include "lcd.h"
#include "storage.h"
#include "accel.h"
#include "timer.h"
#include "pybwlan.h"
......@@ -232,9 +232,7 @@ int main(void) {
#if MICROPY_HW_HAS_SDCARD
sdcard_init();
#endif
#if 0
storage_init();
#endif
int first_soft_reset = true;
......
#include <stdint.h>
#include <string.h>
#include <stm32f4xx_hal.h>
#include "misc.h"
#include "systick.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "led.h"
#include "flash.h"
#include "storage.h"
#define CACHE_MEM_START_ADDR (0x10000000) // CCM data RAM, 64k
#define FLASH_PART1_START_BLOCK (0x100)
#define FLASH_PART1_NUM_BLOCKS (224) // 16k+16k+16k+64k=112k
#define FLASH_MEM_START_ADDR (0x08004000) // sector 1, 16k
static bool flash_is_initialised = false;
static bool flash_cache_dirty;
static uint32_t flash_cache_sector_id;
static uint32_t flash_cache_sector_start;
static uint32_t flash_cache_sector_size;
static uint32_t flash_tick_counter_last_write;
static void flash_cache_flush(void) {
if (flash_cache_dirty) {
// sync the cache RAM buffer by writing it to the flash page
flash_write(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
flash_cache_dirty = false;
// indicate a clean cache with LED off
led_state(PYB_LED_R1, 0);
}
}
static uint8_t *flash_cache_get_addr_for_write(uint32_t flash_addr) {
uint32_t flash_sector_start;
uint32_t flash_sector_size;
uint32_t flash_sector_id = flash_get_sector_info(flash_addr, &flash_sector_start, &flash_sector_size);
if (flash_cache_sector_id != flash_sector_id) {
flash_cache_flush();
memcpy((void*)CACHE_MEM_START_ADDR, (const void*)flash_sector_start, flash_sector_size);
flash_cache_sector_id = flash_sector_id;
flash_cache_sector_start = flash_sector_start;
flash_cache_sector_size = flash_sector_size;
}
flash_cache_dirty = true;
// indicate a dirty cache with LED on
led_state(PYB_LED_R1, 1);
return (uint8_t*)CACHE_MEM_START_ADDR + flash_addr - flash_sector_start;
}
static uint8_t *flash_cache_get_addr_for_read(uint32_t flash_addr) {
uint32_t flash_sector_start;
uint32_t flash_sector_size;
uint32_t flash_sector_id = flash_get_sector_info(flash_addr, &flash_sector_start, &flash_sector_size);
if (flash_cache_sector_id == flash_sector_id) {
// in cache, copy from there
return (uint8_t*)CACHE_MEM_START_ADDR + flash_addr - flash_sector_start;
}
// not in cache, copy straight from flash
return (uint8_t*)flash_addr;
}
void storage_init(void) {
if (!flash_is_initialised) {
flash_cache_dirty = false;
flash_cache_sector_id = 0;
flash_is_initialised = true;
flash_tick_counter_last_write = 0;
}
}
uint32_t storage_get_block_size(void) {
return FLASH_BLOCK_SIZE;
}
uint32_t storage_get_block_count(void) {
return FLASH_PART1_START_BLOCK + FLASH_PART1_NUM_BLOCKS;
}
bool storage_needs_flush(void) {
// wait 2 seconds after last write to flush
return flash_cache_dirty && sys_tick_has_passed(flash_tick_counter_last_write, 2000);
}
void storage_flush(void) {
flash_cache_flush();
}
static void build_partition(uint8_t *buf, int boot, int type, uint32_t start_block, uint32_t num_blocks) {
buf[0] = boot;
if (num_blocks == 0) {
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
} else {
buf[1] = 0xff;
buf[2] = 0xff;
buf[3] = 0xff;
}
buf[4] = type;
if (num_blocks == 0) {
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
} else {
buf[5] = 0xff;
buf[6] = 0xff;
buf[7] = 0xff;
}
buf[8] = start_block;
buf[9] = start_block >> 8;
buf[10] = start_block >> 16;
buf[11] = start_block >> 24;
buf[12] = num_blocks;
buf[13] = num_blocks >> 8;
buf[14] = num_blocks >> 16;
buf[15] = num_blocks >> 24;
}
bool storage_read_block(uint8_t *dest, uint32_t block) {
//printf("RD %u\n", block);
if (block == 0) {
// fake the MBR so we can decide on our own partition table
for (int i = 0; i < 446; i++) {
dest[i] = 0;
}
build_partition(dest + 446, 0, 0x01 /* FAT12 */, FLASH_PART1_START_BLOCK, FLASH_PART1_NUM_BLOCKS);
build_partition(dest + 462, 0, 0, 0, 0);
build_partition(dest + 478, 0, 0, 0, 0);
build_partition(dest + 494, 0, 0, 0, 0);
dest[510] = 0x55;
dest[511] = 0xaa;
return true;
} else if (FLASH_PART1_START_BLOCK <= block && block < FLASH_PART1_START_BLOCK + FLASH_PART1_NUM_BLOCKS) {
// non-MBR block, get data from flash memory, possibly via cache
uint32_t flash_addr = FLASH_MEM_START_ADDR + (block - FLASH_PART1_START_BLOCK) * FLASH_BLOCK_SIZE;
uint8_t *src = flash_cache_get_addr_for_read(flash_addr);
memcpy(dest, src, FLASH_BLOCK_SIZE);
return true;
} else {
// bad block number
return false;
}
}
bool storage_write_block(const uint8_t *src, uint32_t block) {
//printf("WR %u\n", block);
if (block == 0) {
// can't write MBR, but pretend we did
return true;
} else if (FLASH_PART1_START_BLOCK <= block && block < FLASH_PART1_START_BLOCK + FLASH_PART1_NUM_BLOCKS) {
// non-MBR block, copy to cache
uint32_t flash_addr = FLASH_MEM_START_ADDR + (block - FLASH_PART1_START_BLOCK) * FLASH_BLOCK_SIZE;
uint8_t *dest = flash_cache_get_addr_for_write(flash_addr);
memcpy(dest, src, FLASH_BLOCK_SIZE);
flash_tick_counter_last_write = HAL_GetTick();
return true;
} else {
// bad block number
return false;
}
}
#define FLASH_BLOCK_SIZE (512)
void storage_init(void);
uint32_t storage_get_block_size(void);
uint32_t storage_get_block_count(void);
bool storage_needs_flush(void);
void storage_flush(void);
bool storage_read_block(uint8_t *dest, uint32_t block);
bool storage_write_block(const uint8_t *src, uint32_t block);
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