Hello @JHOUD
Thank you for quick answer, I try to write some important data on flash of stm32g0(I am using stm32g0b1 series) to update my device but when I try to store new data and erase old data from flash, I got the FLASH_FLAG_PGAERR ERROR, FLASH_FLAG_PGSERR ERROR. I am using this examples of stm32g0b1 for reference but still get some issue. Sometimes erase and write and happen and after the next try operation is failed. I don’t understand why this happen. Please help me to debug the problem why some time erase and write is complete and next try is not.
I am using the FLASH BANK 1
And starting address of bootloader 0800 0000 (i put bootloader at starting address of flash for my requirements).
End address of bootloader - 0800 1FFF
And starting address of data – 0800 1800
End address of data - 0803 FFFF
Erasing Method – page erase
@JHOUD what exactly is this pFlash.ErrorCode?
i got this variable in HAL_FLASH G0 header file. i put screenshot of function 
#define USER_FLASH_END_ADDRESS 0x0803FFFF //End of Address
#define ACTUAL_IMAGE_ADDRESS 0X08001800 //
#define NEW_IMAGE_ADDRESS 0x08020000
#define MAGIC_BYTE_ADDRESS 0x0803F800
#define NEW_IMAGE_CHKSUM_ADDRESS 0x0803F808
#define NEW_IMAGE_PG_SIZE_ADDRESS 0x0803F810
uint8_t flash_app_erase(uint32_t page_address, uint32_t no_of_pages)
{
uint8_t ret_value = ERROR;
FLASH_EraseInitTypeDef flash_struct;
uint32_t flash_error;
uint32_t first_page;
uint32_t bank_number;
bank_number = get_bank(page_address);
first_page = GetPage(page_address);
flash_struct.Page = first_page;
flash_struct.Banks = bank_number;
flash_struct.TypeErase = FLASH_TYPEERASE_PAGES;
flash_struct.NbPages = no_of_pages;
if (HAL_FLASHEx_Erase(&flash_struct, &flash_error) == HAL_OK)
{
ret_value = SUCCESS;
}
return ret_value;
}
uint8_t flash_app_write(uint32_t flash_write_address, uint8_t* write_data ,uint16_t data_size)
{
uint16_t local_data_size = 0;
uint16_t write_counter = 0;
uint8_t ret_value = ERROR;
uint64_t write_var;
uint32_t temp_flash_addr = flash_write_address;
local_data_size = data_size/8; // STM32G0 writes in double word(8 bytes)
if((data_size % 8) != 0)
{
local_data_size += 1;
}
for(write_counter = 0; write_counter < local_data_size; write_counter++)
{
memcpy(&write_var,(uint8_t*)&write_data[8*write_counter],8);
//the operation will be done by word
if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD,temp_flash_addr,write_var) == HAL_OK) {
//Check the written value
if(memcmp((uint8_t*)temp_flash_addr,(uint8_t*)&write_var,8) != 0) {
break; // Error condition
}
temp_flash_addr += 8; // increment flash address
}
else
{
temp_flash_addr = flash_write_address;
break; // Error condition
}
}
if(write_counter == local_data_size) {
ret_value = SUCCESS;
}
return ret_value;
}
