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correctly translate memory address/block from LFS to STM32 HAL

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Reading and writing FLASH works!
This commit is contained in:
Daniel Peter Chokola 2025-02-06 03:30:58 -05:00
parent 2f6f786f73
commit f60ccc545d
2 changed files with 89 additions and 96 deletions
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157
src/platform/stm32wl/LittleFS.cpp
View File

@ -23,41 +23,46 @@
*/
#include "LittleFS.h"
#include "stm32wlxx_hal_flash.h"
/**********************************************************************************************************************
* Macro definitions
**********************************************************************************************************************/
/** This macro is used to suppress compiler messages about a parameter not being used in a function. */
#define PARAMETER_NOT_USED(p) (void)((p))
#define LFS_UNUSED(p) (void)((p))
#define STM32WL_SECTOR_SIZE 0x800 /* 2K */
#define STM32WL_SECTOR_COUNT 14
#define STM32WL_PAGE_SIZE (FLASH_PAGE_SIZE)
#define STM32WL_PAGE_COUNT (FLASH_PAGE_NB)
#define STM32WL_FLASH_BASE (FLASH_BASE)
#define LFS_FLASH_TOTAL_SIZE (STM32WL_SECTOR_COUNT * STM32WL_SECTOR_SIZE)
#define LFS_BLOCK_SIZE 128
/* FLASH_SIZE from stm32wle5xx.h will read the actual FLASH size from the chip */
/* use the last 1/4 of the FLASH */
#define LFS_FLASH_TOTAL_SIZE (FLASH_SIZE / 4)
#define LFS_BLOCK_SIZE (128)
#define LFS_FLASH_ADDR_END (FLASH_END_ADDR)
#define LFS_FLASH_ADDR_BASE (LFS_FLASH_ADDR_END - (FLASH_SIZE / 4) + 1)
#define LFS_FLASH_ADDR (262144 - LFS_FLASH_TOTAL_SIZE)
#if !CFG_DEBUG
#define _LFS_DBG(fmt, ...)
#else
#define _LFS_DBG(fmt, ...) printf("%s:%d (%s): " fmt "\n", __FILE__, __LINE__, __func__, __VA_ARGS__)
#endif
//--------------------------------------------------------------------+
// LFS Disk IO
//--------------------------------------------------------------------+
static inline uint32_t lba2addr(uint32_t block)
{
return ((uint32_t)LFS_FLASH_ADDR) + block * LFS_BLOCK_SIZE;
}
static int _internal_flash_read(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size)
{
PARAMETER_NOT_USED(c);
LFS_UNUSED(c);
if (!buffer || !size) {
printf("%s Invalid parameter!\r\n", __func__);
_LFS_DBG("%s Invalid parameter!\r\n", __func__);
return LFS_ERR_INVAL;
}
lfs_block_t address = LFS_FLASH_ADDR + (block * STM32WL_SECTOR_SIZE + off);
// printf("+%s(Addr 0x%06lX, Len 0x%04lX)\r\n",__func__,address,size);
// hexdump((void *)address,size);
lfs_block_t address = LFS_FLASH_ADDR_BASE + (block * STM32WL_PAGE_SIZE + off);
memcpy(buffer, (void *)address, size);
return LFS_ERR_OK;
@ -68,38 +73,38 @@ static int _internal_flash_read(const struct lfs_config *c, lfs_block_t block, l
// May return LFS_ERR_CORRUPT if the block should be considered bad.
static int _internal_flash_prog(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size)
{
// (void) c;
// uint32_t addr = lba2addr(block) + off;
// VERIFY( flash_nrf5x_write(addr, buffer, size), -1)
// return 0;
PARAMETER_NOT_USED(c);
lfs_block_t address = LFS_FLASH_ADDR + (block * STM32WL_SECTOR_SIZE + off);
lfs_block_t address = LFS_FLASH_ADDR_BASE + (block * STM32WL_PAGE_SIZE + off);
HAL_StatusTypeDef hal_rc = HAL_OK;
uint32_t block_count = size / 8;
uint64_t *bufp = (uint64_t *) buffer;
// printf("+%s(Addr 0x%06lX, Len 0x%04lX)\r\n",__func__,address,size);
// hexdump((void *)address,size);
/* Program the user Flash area word by word
(area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/
uint64_t data_source;
LFS_UNUSED(c);
if(HAL_FLASH_Unlock() != HAL_OK)
{
return LFS_ERR_IO;
}
for (uint32_t i = 0; i < block_count; i++) {
memcpy(&data_source, buffer, 8); // load the 64-bit source from the buffer
hal_rc = HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, data_source);
if (hal_rc == HAL_OK) {
address += 8;
buffer = (uint8_t *)buffer + 8;
} else {
if((address < LFS_FLASH_ADDR_BASE) || (address > LFS_FLASH_ADDR_END))
{
_LFS_DBG("Wanted to program out of bound of FLASH: 0x%08x.\n", address);
HAL_FLASH_Lock();
return LFS_ERR_INVAL;
}
hal_rc = HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, *bufp);
if (hal_rc != HAL_OK) {
/* Error occurred while writing data in Flash memory.
User can add here some code to deal with this error */
printf("Program Error, 0x%X\n", hal_rc);
} // else
} // for
// printf("-%s\n",__func__);
* User can add here some code to deal with this error.
*/
_LFS_DBG("Program error at (0x%08x), 0x%X, error: 0x%08x\n", address, hal_rc, HAL_FLASH_GetError());
}
address += 8;
bufp += 8;
}
if(HAL_FLASH_Lock() != HAL_OK)
{
return LFS_ERR_IO;
}
return hal_rc == HAL_OK ? LFS_ERR_OK : LFS_ERR_IO; // If HAL_OK, return LFS_ERR_OK, else return LFS_ERR_IO
}
@ -110,38 +115,28 @@ static int _internal_flash_prog(const struct lfs_config *c, lfs_block_t block, l
// May return LFS_ERR_CORRUPT if the block should be considered bad.
static int _internal_flash_erase(const struct lfs_config *c, lfs_block_t block)
{
// (void) c;
// uint32_t addr = lba2addr(block);
// // implement as write 0xff to whole block address
// for(int i=0; i <LFS_BLOCK_SIZE; i++)
// {
// flash_nrf5x_write8(addr + i, 0xFF);
// }
// // flash_nrf5x_flush();
// return 0;
PARAMETER_NOT_USED(c);
lfs_block_t address = LFS_FLASH_ADDR + (block * STM32WL_SECTOR_SIZE);
// printf("+%s(Addr 0x%06lX)\r\n",__func__,address);
lfs_block_t address = LFS_FLASH_ADDR_BASE + (block * STM32WL_PAGE_SIZE);
HAL_StatusTypeDef hal_rc;
FLASH_EraseInitTypeDef EraseInitStruct;
FLASH_EraseInitTypeDef EraseInitStruct = {
.TypeErase = FLASH_TYPEERASE_PAGES,
.Page = 0,
.NbPages = 1
};
uint32_t PAGEError = 0;
/* Fill EraseInit structure*/
EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
EraseInitStruct.Page = (address - FLASH_BASE) / STM32WL_SECTOR_SIZE;
EraseInitStruct.NbPages = 1;
LFS_UNUSED(c);
if((address < LFS_FLASH_ADDR_BASE) || (address > LFS_FLASH_ADDR_END))
{
_LFS_DBG("Wanted to erase out of bound of FLASH: 0x%08x.\n", address);
return LFS_ERR_INVAL;
}
/* calculate the absolute page, i.e. what the ST wants */
EraseInitStruct.Page = (address - STM32WL_FLASH_BASE) / STM32WL_PAGE_SIZE;
_LFS_DBG("Erasing block %d at 0x%08x... ", block, address);
HAL_FLASH_Unlock();
hal_rc = HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError);
// if (hal_rc != HAL_OK)
// {
// printf("%s ERROR 0x%X\n",__func__,hal_rc);
// }
// else
// printf("%s SUCCESS\n",__func__);
HAL_FLASH_Lock();
return hal_rc == HAL_OK ? LFS_ERR_OK : LFS_ERR_IO; // If HAL_OK, return LFS_ERR_OK, else return LFS_ERR_IO
}
@ -150,17 +145,14 @@ static int _internal_flash_erase(const struct lfs_config *c, lfs_block_t block)
// are propogated to the user.
static int _internal_flash_sync(const struct lfs_config *c)
{
// (void) c;
// flash_nrf5x_flush();
// return 0;
PARAMETER_NOT_USED(c);
LFS_UNUSED(c);
// write function performs no caching. No need for sync.
// printf("+%s()\r\n",__func__);
return LFS_ERR_OK;
// return LFS_ERR_IO;
}
static struct lfs_config _InternalFSConfig = {.context = NULL,
static struct lfs_config _InternalFSConfig = {
.context = NULL,
.read = _internal_flash_read,
.prog = _internal_flash_prog,
@ -176,7 +168,8 @@ static struct lfs_config _InternalFSConfig = {.context = NULL,
.read_buffer = NULL,
.prog_buffer = NULL,
.lookahead_buffer = NULL,
.file_buffer = NULL};
.file_buffer = NULL
};
LittleFS InternalFS;
@ -188,11 +181,11 @@ LittleFS::LittleFS(void) : STM32_LittleFS(&_InternalFSConfig) {}
bool LittleFS::begin(void)
{
// failed to mount, erase all sector then format and mount again
// failed to mount, erase all pages then format and mount again
if (!STM32_LittleFS::begin()) {
// Erase all sectors of internal flash region for Filesystem.
for (uint32_t addr = LFS_FLASH_ADDR; addr < LFS_FLASH_ADDR + LFS_FLASH_TOTAL_SIZE; addr += STM32WL_SECTOR_SIZE) {
_internal_flash_erase(&_InternalFSConfig, (addr - LFS_FLASH_ADDR) / STM32WL_SECTOR_SIZE);
// Erase all pages of internal flash region for Filesystem.
for (uint32_t addr = LFS_FLASH_ADDR_BASE; addr < (LFS_FLASH_ADDR_END + 1); addr += STM32WL_PAGE_SIZE) {
_internal_flash_erase(&_InternalFSConfig, (addr - LFS_FLASH_ADDR_BASE) / STM32WL_PAGE_SIZE);
}
// lfs format

2
src/platform/stm32wl/STM32_LittleFS.h
View File

@ -97,7 +97,7 @@ class STM32_LittleFS
#define PRINT_LFS_ERR(_err) \
do { \
if (_err) { \
VERIFY_MESS((long int)_err, dbg_strerr_lfs); \
printf("%s:%d, LFS error: %d\n", __FILE__, __LINE__, _err); \
} \
} while (0) // LFS_ERR are of type int, VERIFY_MESS expects long_int