Hello i have a problem with FLASH SR REG setting up flags when i try to write in flash, im using stm32g4 wit 521kbs flash and dual banks plss help.

[skaur.1]

Here is my code : ignore the led toggles , the screenshot of the sr reg is below and highlited bits. Im guessing it has something to to with the arhitecture of the cpu.

Kind regards.

void flash_page_write(void)

{

uint32_t addrr_start=0x08001000;

uint32_t addrr_end=0x08001FFF;

static const uint64_t Data64_To_Prog[32] = {

 0x0000000000000000, 0x1111111111111111, 0x2222222222222222, 0x3333333333333333,

 0x4444444444444444, 0x5555555555555555, 0x6666666666666666, 0x7777777777777777,

 0x8888888888888888, 0x9999999999999999, 0xAAAAAAAAAAAAAAAA, 0xBBBBBBBBBBBBBBBB,

 0xCCCCCCCCCCCCCCCC, 0xDDDDDDDDDDDDDDDD, 0xEEEEEEEEEEEEEEEE, 0xFFFFFFFFFFFFFFFF,

 0x0011001100110011, 0x2233223322332233, 0x4455445544554455, 0x6677667766776677,

 0x8899889988998899, 0xAABBAABBAABBAABB, 0xCCDDCCDDCCDDCCDD, 0xEEFFEEFFEEFFEEFF,

 0x2200220022002200, 0x3311331133113311, 0x6644664466446644, 0x7755775577557755,

 0xAA88AA88AA88AA88, 0xBB99BB99BB99BB99, 0xEECCEECCEECCEECC, 0xFFDDFFDDFFDDFFDD};

 uint32_t src_addr = (uint32_t)Data64_To_Prog;

 HAL_FLASH_Unlock();

 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);

 FLASH_PageErase(2, 1);

 while(addrr_start<addrr_end){

 if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_FAST, addrr_start, (uint64_t)src_addr) == HAL_OK ) {

 LED_toggle(LED7);

 addrr_start=addrr_start+(32*sizeof(uint64_t));

 LED_toggle(LED7);

 }

 else {LED_toggle(LED1); HAL_Delay(1000); LED_toggle(LED1);}

 }

// HAL_FLASH_Program(FLASH_TYPEPROGRAM_FAST, addrr_start, (uint64_t)src_addr);

 HAL_FLASH_Lock();

 }

[TThan]

Hi skaur.1,

could you please give some more details about the FLASJ_PageErase function? I assume this function was written by you, since it is no HAL function.

When exactly get the error flags set? After the erase process, after the first call to HAL_FLASH_Program or later?

Best Regards

Thomas

[skaur.1]

Hello

the page erase function is in HAL library, all it does it erases a page of memory and puts 1 into CR->PER register. the error bits begin when the function is first called and everytime after. the trouble starts when the HAL_PROG_FUN goes in to the second case of status=WAIT_FOR_THE_LAST_OPERATION().

And yea i dont know why this seems to happen. I dont se any problems with my code and I didnt touch the hal functions.

Regards,

[skaur.1 · Accepted solution]

Thanks for the effort I have found the problem I was eracing pages wrong.

[TThan]

That's great to hear.:thumbs_up:

(please don't forget to mark this threas a answered)

[Piranha]

The FLASH_PageErase() function is not meant to be used by the user code. User code must use the HAL_FLASHEx_Erase() function.

And the 3rd argument of the HAL_FLASH_Program() function is for a data itself, not a pointer to a data memory.