STM32F429 Flash write/read

[ECARV.1]

I'm trying to write and read some data into flash. But not work. Anybody help me?

I'm using Cubeide and STM32F429 board.

char test_data[]="TEST";

char test_data2[5];

uint32_t PAGEError = 0;

 FLASH_EraseInitTypeDef EraseInitStruct;

 EraseInitStruct.TypeErase  = FLASH_TYPEERASE_SECTORS ;

 EraseInitStruct.Sector  = FLASH_SECTOR_0;

 EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;

 HAL_FLASH_Unlock();

 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);

 HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError);

 HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, 0x08000020, test_data);

 HAL_FLASH_Lock();

  *test_data2 = *(__IO uint32_t *)0x08000020;

  HAL_UART_Transmit(&huart1, (uint8_t *) test_data2, 5,500);

[waclawek.jan]

Your program probably resides in the same FLASH_SECTOR_0 which you are trying to erasing. Use a different sector.

JW