How to write into flash memory using HAL_FLASH_PROGRAM with FLASH_TYPEPROGRAM_QUADWORD

[RiverDi_user]

Hello,

I am new to STM32 and I am trying to write into FLASH memory using some reference code I found in internet. Here is my write function:

uint32_t Flash_Write_Data (uint32_t StartPageAddress, uint32_t *Data, uint16_t numberofwords)

{

static FLASH_EraseInitTypeDef EraseInitStruct;

uint32_t PAGEError;

int sofar=0;

/* Unlock the Flash to enable the flash control register access *************/

HAL_FLASH_Unlock();

/* Erase the user Flash area*/

uint32_t StartPage = GetPage(StartPageAddress);

uint32_t EndPageAdress = StartPageAddress + numberofwords*32;

uint32_t EndPage = GetPage(EndPageAdress);

/* Fill EraseInit structure*/

EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;

EraseInitStruct.Page = page_indx;

EraseInitStruct.NbPages = ((EndPage - StartPage)/FLASH_PAGE_SIZE) +1;

if (HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError) != HAL_OK)

{

/*Error occurred while page erase.*/

return HAL_FLASH_GetError ();

}

/* Program the user Flash area word by word*/

while (sofar<numberofwords)

{

if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_QUADWORD, StartPageAddress, Data[sofar]) == HAL_OK)

{

StartPageAddress += 32; // use StartPageAddress += 2 for half word and 8 for double word

sofar++;

}

else

{

/* Error occurred while writing data in Flash memory*/

return HAL_FLASH_GetError ();

}

}

/* Lock the Flash to disable the flash control register access (recommended

to protect the FLASH memory against possible unwanted operation) *********/

HAL_FLASH_Lock();

return 0;

}

-----------------------

Function call for write in main.c:

char *data = "hello stm32";

uint32_t Rx_Data[30];

Flash_Write_Data(0x083FE000 , (uint32_t *)data, 2);

float number = 123;

Flash_Write_NUM(0x083FC000, number);

-----------------------

When I tried to write the data into flash memory my application just writes 0's in the memory (I checked using STM32 programmer)

and when I tried to write a number into the flash instead of char data, I get hardfault handler issue.

What am I doing wrong here? Can anyone shed some light please?

Regards

RiverDI user

[EXUE.2]

which MCU are you used? since your write flash address is start from the internal 0x083FE000, your MCU flash size is bigger than 3M?

[RiverDi_user]

Hello, 

Yes, my Flash is 4 MB and which has 512 pages of 8KB each.

My MCU is: STM32U5A9

I am trying to write into flash using my above code, after I write into flash I am getting hard fault handler error. Once I restart the device, I could see the data written into the flash, but my problem is my app is getting into "hard-fault" handler when I write into flash.

Could you point out what is missing in my code?

Thanks & Regards

[EXUE.2]

there is no obvious problem for your code, but there are some rules to write flash, like flash write align 4 bytes, flash latency configuration must correct.... I suggest you to download 'STM32CubeMX' tool to execute the flash operate demo to find the cause.

STM32CubeMX link: https://www.st.com/en/development-tools/stm32cubemx.html#get-software

[RiverDi_user]

Hello, Can you point out the example flash operate demo name? I couldn't find it in my IDE example projects.

[EXUE.2]

can you find the '\Projects\STM32U5x9J-DK\Examples\FLASH\FLASH_EraseProgram\...'?