Discovery stm32f429i I want to write text and dates to Flash

[Study Yahoo]

Posted on November 10, 2017 at 03:25

Hello I am looking at the STM32F429 Discovery board Flash memory sample source as below.

I'm recording Hex values in flash memory.

The sample is to be input with a value of 4 bytes Hex ((uint32_t) 0x12345678). Tell me how to write text (hello world) and date (2017-11-09) to Flash memory

Thank you.

Have a nice day!!

============================== sample source ===================================

#define FLASH_USER_START_ADDR ADDR_FLASH_SECTOR_2 /* Start @ of user Flash area */

#define FLASH_USER_END_ADDR ADDR_FLASH_SECTOR_23 + GetSectorSize(ADDR_FLASH_SECTOR_23) -1 /* End @ of user Flash area : sector start address + sector size -1 */

#define DATA_32 ((uint32_t)0x12345678)

EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;

EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;

EraseInitStruct.Sector = FirstSector;

EraseInitStruct.NbSectors = NbOfSectors;

while (Address < FLASH_USER_END_ADDR)

{

if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, DATA_32) == HAL_OK)

{

Address = Address + 4;

}

else

{

/* Error occurred while writing data in Flash memory.

User can add here some code to deal with this error */

/*

FLASH_ErrorTypeDef errorcode = HAL_FLASH_GetError();

*/

Error_Handler();

}

}

<Memory

Debugging>

[Tesla DeLorean]

Posted on November 10, 2017 at 03:31

So use a uint32_t* pointer and advance it with each write

char str[] = 'Hello World!';

uint32_t *p = (

uint32_t *)str;

    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, *p++) == HAL_OK)

    {

      Address = Address + 4;

    }

[Study Yahoo · Accepted solution]

Posted on November 10, 2017 at 03:34

Thank you for your reply.

Is the date format the same?

[Study Yahoo]

Posted on November 10, 2017 at 03:44

Thank you for your reply.

Is the date format the same?

After writing text and date in flash memory

Lead Text and date, move to buffer or variableI want to write to usb stick memory sequentially.

If you have a similar sample, I would appreciate your support.

Have a nice day!

[Tesla DeLorean]

Posted on November 10, 2017 at 05:15

>>

Is the date format the same?

It is all just bytes of data in memory, the processor doesn't distinguish if it is a greeting or a time stamp. The routine you have writes 32-bit words, a collection of four 8-bit bytes.

Create and manipulate strings with strcpy(), strcat(), sprintf(), etc

char str[] = 'Backup generator failed to start 2017-11-09 09:32';

uint32_t *p = (uint32_t *)str;uint32_t WordCount = (strlen(str) + 3) / 4; // 32-bit words in string

while (WordCount--)

{ if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, *p++) == HAL_OK) { Address = Address + 4; } else { /* Error occurred while writing data in Flash memory. User can add here some code to deal with this error */ /* FLASH_ErrorTypeDef errorcode = HAL_FLASH_GetError(); */ Error_Handler(); } }