基于STM32F407 HAL库的Flash编程操作

flash的初始化，解锁flash和清除一些flash的异常状态标识

uint16_t MEM_If_Init_FS(void) 
{

    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);

}

uint16_t MEM_If_DeInit_FS(void) 
{
    HAL_FLASH_Lock();
}

flash 的檫除操作

uint16_t MEM_If_Erase_FS(uint32_t start_Add,uint32_t end_Add)
{
    /* USER CODE BEGIN 3 */
    uint32_t UserStartSector;
    uint32_t SectorError;
    FLASH_EraseInitTypeDef pEraseInit;

    /* Unlock the Flash to enable the flash control register access *************/
    MEM_If_Init_FS();

    /* Get the sector where start the user flash area */
    UserStartSector = GetSector(start_Add);

    pEraseInit.TypeErase = TYPEERASE_SECTORS;
    pEraseInit.Sector = UserStartSector;
    pEraseInit.NbSectors = GetSector(end_Add)-UserStartSector+1 ;
    pEraseInit.VoltageRange = VOLTAGE_RANGE_3;

    if (HAL_FLASHEx_Erase(&pEraseInit, &SectorError) != HAL_OK)
    {
        /* Error occurred while page erase */
        return (1);
    }

    return (USBD_OK);
    /* USER CODE END 3 */
}

擦除操作,先解锁,然后清空所需flash所在sector。注意这里的sector使用GetSector()函数获取的，是一个整型数字（对于F4就是0~11）。
其中的NbSectors是需要清除的sector的个数。
 

下面是获取sector的编号
我们先按照用户手册上写的在文件usbd_dfu_if.h中define一些需要用到的sector起始地址

#define ADDR_FLASH_SECTOR_0     ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbyte */
#define ADDR_FLASH_SECTOR_1     ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbyte */
#define ADDR_FLASH_SECTOR_2     ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbyte */
#define ADDR_FLASH_SECTOR_3     ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbyte */
#define ADDR_FLASH_SECTOR_4     ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbyte */
#define ADDR_FLASH_SECTOR_5     ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbyte */
#define ADDR_FLASH_SECTOR_6     ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbyte */
#define ADDR_FLASH_SECTOR_7     ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbyte */
#define ADDR_FLASH_SECTOR_8     ((uint32_t)0x08080000) /* Base @ of Sector 8, 128 Kbyte */
#define ADDR_FLASH_SECTOR_9     ((uint32_t)0x080A0000) /* Base @ of Sector 9, 128 Kbyte */
#define ADDR_FLASH_SECTOR_10    ((uint32_t)0x080C0000) /* Base @ of Sector 10, 128 Kbyte */
#define ADDR_FLASH_SECTOR_11    ((uint32_t)0x080E0000) /* Base @ of Sector 11, 128 Kbyte */

再在usbd_dfu_if.c文件末尾添加函数:

/**
  * @brief  Gets the sector of a given address
  * @param  Address: Flash address
  * @retval The sector of a given address
  */
static uint32_t GetSector(uint32_t Address)
{
  uint32_t sector = 0;
  
  if((Address < ADDR_FLASH_SECTOR_1) && (Address >= ADDR_FLASH_SECTOR_0))
  {
    sector = FLASH_SECTOR_0;  
  }
  else if((Address < ADDR_FLASH_SECTOR_2) && (Address >= ADDR_FLASH_SECTOR_1))
  {
    sector = FLASH_SECTOR_1;  
  }
  else if((Address < ADDR_FLASH_SECTOR_3) && (Address >= ADDR_FLASH_SECTOR_2))
  {
    sector = FLASH_SECTOR_2;  
  }
  else if((Address < ADDR_FLASH_SECTOR_4) && (Address >= ADDR_FLASH_SECTOR_3))
  {
    sector = FLASH_SECTOR_3;  
  }
  else if((Address < ADDR_FLASH_SECTOR_5) && (Address >= ADDR_FLASH_SECTOR_4))
  {
    sector = FLASH_SECTOR_4;  
  }
  else if((Address < ADDR_FLASH_SECTOR_6) && (Address >= ADDR_FLASH_SECTOR_5))
  {
    sector = FLASH_SECTOR_5;  
  }
  else if((Address < ADDR_FLASH_SECTOR_7) && (Address >= ADDR_FLASH_SECTOR_6))
  {
    sector = FLASH_SECTOR_6;  
  }
  else if((Address < ADDR_FLASH_SECTOR_8) && (Address >= ADDR_FLASH_SECTOR_7))
  {
    sector = FLASH_SECTOR_7;  
  }
  else if((Address < ADDR_FLASH_SECTOR_9) && (Address >= ADDR_FLASH_SECTOR_8))
  {
    sector = FLASH_SECTOR_8;  
  }
  else if((Address < ADDR_FLASH_SECTOR_10) && (Address >= ADDR_FLASH_SECTOR_9))
  {
    sector = FLASH_SECTOR_9;  
  }
  else if((Address < ADDR_FLASH_SECTOR_11) && (Address >= ADDR_FLASH_SECTOR_10))
  {
    sector = FLASH_SECTOR_10;  
  }
  else
  {
    sector = FLASH_SECTOR_11;  
  }

  return sector;
}

 

flash写入操作

uint16_t MEM_If_Write_FS(uint8_t *src, uint8_t *dest, uint32_t Len)
{
    /* USER CODE BEGIN 3 */
    uint32_t i = 0;

    for(i = 0; i < Len; i+=4)
    {
        /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
           be done by byte */
        if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, (uint32_t)(dest+i), *(uint32_t*)(src+i)) == HAL_OK)
        {
            /* Check the written value */
            if(*(uint32_t *)(src + i) != *(uint32_t*)(dest+i))
            {
                /* Flash content doesn't match SRAM content */
                return 2;
            }
        }
        else
        {
            /* Error occurred while writing data in Flash memory */
            return 1;
        }
    }
    return (HAL_OK);
    /* USER CODE END 3 */
}

flash读出操作

uint8_t *MEM_If_Read_FS (uint8_t *src, uint8_t *dest, uint32_t Len)
{
    /* Return a valid address to avoid HardFault */
    /* USER CODE BEGIN 4 */
	    uint32_t i = 0;
    uint8_t *psrc = src;

    for(i = 0; i < Len; i++)
    {
        dest[i] = *psrc++;
    }
    return HAL_OK;

    /* USER CODE END 4 */
}