HAL_FLASH_Program doesn't work at very beginning of firmware application?
I have one question regarding the HAL_FLASH_Program function. I use the HAL_FLASH_Program many times during the runtime of the firmware. I use it to store log, warnings and errors in the several flash pages. When the page is full and I must write into it I erase the page, obviously.
However, at the very begining I also want to store the "reset cause" (an entry in the flash pages) of the last power cycle (switch on off). Was it a BOR, WWDOG, IWOG, PINRST, etc, etc,..?
Unfortunately, I am unable to successfully use HAL_FLASH_Program with a HAL_OK. It seems as if HAL_FLASH_Program does not work at the very beginning of the firmware application... does it sound crazy? Could it be that this function needs some time to work.
/**
* @brief The function's role is to save the log data into the log page/s.
*/
mid_error_t flash_program_loop_2(const uint8_t * data_in)
{
HAL_FLASH_Unlock();
/**
* first we check if the next position to write is valid.
* If it is not valid, we need to erase the page and start from the beginning.
*/
if (flash_next_i_log > flash_end_i_log)
{
flash_next_i_log = flash_start_i_log;
}
if (flash_read_data(flash_next_i_log) != 0xFFFFFFFF)
{
flash_erase_page_by_address(flash_next_i_log);
// we need to erase the page before writing
flash_counter_log = flash_counter_log - (FLASH_PAGE_SIZE/size_of_log_struct_in_flash); // we are removing the logs that were in that page);
}
/**
* now we write the data.
*/
for (uint8_t f_i = 0; f_i < size_of_log_struct_in_flash; f_i += 8)
{
uint8_t auxdata[8] = { 0 };
/**
* if the writing is urgent.
*/
memcpy(auxdata, &(data_in[f_i]),8*sizeof(uint8_t));
if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD,
(uint32_t)flash_next_i_log + (uint32_t)f_i,
(uint64_t) auxdata[0] | ((uint64_t) auxdata[1] << 8)
| ((uint64_t) auxdata[2] << 16)
| ((uint64_t) auxdata[3] << 24)
| ((uint64_t) auxdata[4] << 32)
| ((uint64_t) auxdata[5] << 40)
| ((uint64_t) auxdata[6] << 48)
| ((uint64_t) auxdata[7] << 56)) != HAL_OK)
{
return MID_ERROR_GENERAL ;
}
}
flash_last_i_log = flash_next_i_log; // updating last log position
flash_next_i_log += size_of_log_struct_in_flash;
if (flash_next_i_log > flash_end_i_log)
{
flash_next_i_log = flash_start_i_log;
}
flash_counter_log++; // we are adding one more log
flash_counter_log_aux2++;
return MID_ERROR_OK; // everything went ok
}
I thought that with HAL_init, SystemClock_config and Mx_GPIO_Init was enough...
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();What do you think?
Thanks for all.
Sorry for the trouble.
Merry Christmas and Happy New Year 2026.