I want to write to flash Sector 11 of STM32F407VGT from my user code to store some data. I have used the stm32f4xx_hal_flash.c library. I first erase the sector using this code:
void Flash_Init(void)
{
FLASH_EraseInitTypeDef pEraseInit;
pEraseInit.Banks = FLASH_BANK_1;
pEraseInit.NbSectors = 1;
pEraseInit.Sector = FLASH_SECTOR_10;
pEraseInit.VoltageRange = FLASH_VOLTAGE_RANGE_3;
pEraseInit.TypeErase = FLASH_TYPEERASE_SECTORS;
if(HAL_FLASH_Unlock() == HAL_OK)
{
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGSERR );
HAL_FLASHEx_Erase(&pEraseInit,0);
HAL_FLASH_Lock();
}
}
The program hangs when it reaches the HAL_FLASHEx_Erase(&pEraseInit,0); function. My scatter file looks like this:
LR_IROM1 0x08000000 0x01000000 { ; load region size_region
ER_IROM1 0x08000000 0x01000000 { ; load address = execution address
*.o (RESET, +First)
*(InRoot$$Sections)
.ANY (+RO)
}
RW_IRAM1 0x20000000 0x00020000 { ; RW data
.ANY (+RW +ZI)
}
RW_IRAM2 0x10000000 0x00010000 {
.ANY (+RW +ZI)
}
}
Is there something I must do first to allow this function to work?
You want to write sector 11 but your pEraseInit.Sector variable is FLASH_SECTOR_10 in your init function. So you should change FLASH_SECTOR_10 to FLASH_SECTOR_11. Also if you are use CubeMX you can try following write and read function without init function.
uint32_t flash_read(uint32_t address){
return *(uint32_t*)address;
}
void flash_write(uint32_t address, uint32_t data){
HAL_FLASH_Unlock();
FLASH_Erase_Sector(FLASH_SECTOR_11,VOLTAGE_RANGE_1);
HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD,address,data);
HAL_FLASH_Lock();
}
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