STM32F401 HAL_FLASH_Program not working

SGasp.1 · ‎2021-10-04

Hi community..

I have the following code :

bool FLASH_WriteDoubleWord(uint32_t flashAddress, uint64_t Data)
{
 
	FLASH_Unlock();
	/*clear some flag*/
	 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGSERR );
 
	//FLASH_Erase_Sector(2, 2);
	 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGSERR );
 
	/* Program the user Flash area word by word */
	if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, (uint32_t)&flashAddress, Data) != HAL_OK)
	{
		FLASH_Lock();
		return false;
	}
 
	FLASH_Lock();
 
	return true;
}

where

static uint32_t     address_test = 0x08008000;
static uint64_t     data_test    = 0xAAAAAAAA;

I don't understand why the erase part is working instead HAL_FLASH_Program it is not writing the data in the expected address.

Can you please tell me why in your opinion?

Thanks a lot.

Simone

SGasp.1 · ‎2021-10-05

Yes... The function is returning an error... I will try to print out the flags status

SGasp.1 · ‎2021-10-05

i tried in this way

bool FLASH_WriteDoubleWord(uint32_t flashAddress, uint64_t Data)
{
 
	FLASH_Unlock();
	FLASH_EraseSectors(2, 1);       /*working*/
	HAL_Delay(500);
	FLASH_Unlock();
	HAL_Delay(500);
 
	/* Program the user Flash area word by word */
	if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, (uint32_t) flashAddress, Data) != HAL_OK)   /*not working*/
	{
 
		Turn_on_red_led();
		FLASH_Lock();
		return false;
	}
 
	FLASH_Lock();
 
	return true;
}

Now I don't get the erro from HAL but when I check the flash the values is not written as expected.

Piranha · ‎2021-10-05

Read the relevant sections of a reference manual? RM0368 section 3.5.2 explains your "problem" very clearly.

***Edited by moderation: please refrain from using inflammatory language***

SGasp.1 · ‎2021-10-05

Thanks Piranha...

RM0368 section 3.5.2 explains your "problem" very clearly...

Can you make a recap about what this point is saying?

Thanks a lot

Piranha · ‎2021-10-10

No, I will not read for you. You have the document and section number - go and read it!