stm32f4 hal 内部flash

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);
•  
   
•  
  }

 

1.  
   uint16_t MEM_If_DeInit_FS(void)
2.  
   {
3.  
   HAL_FLASH_Lock();
4.  
   }
5.  
    

flash 的檫除操作

1.  
   uint16_t MEM_If_Erase_FS(uint32_t start_Add,uint32_t end_Add)
2.  
   {
3.  
   /* USER CODE BEGIN 3 */
4.  
   uint32_t UserStartSector;
5.  
   uint32_t SectorError;
6.  
   FLASH_EraseInitTypeDef pEraseInit;
7.  
    
8.  
   /* Unlock the Flash to enable the flash control register access *************/
9.  
   MEM_If_Init_FS();
10.  
     
11.  
    /* Get the sector where start the user flash area */
12.  
    UserStartSector = GetSector(start_Add);
13.  
     
14.  
    pEraseInit.TypeErase = TYPEERASE_SECTORS;
15.  
    pEraseInit.Sector = UserStartSector;
16.  
    pEraseInit.NbSectors = GetSector(end_Add)-UserStartSector+1 ;
17.  
    pEraseInit.VoltageRange = VOLTAGE_RANGE_3;
18.  
     
19.  
    if (HAL_FLASHEx_Erase(&pEraseInit, &SectorError) != HAL_OK)
20.  
    {
21.  
    /* Error occurred while page erase */
22.  
    return (1);
23.  
    }
24.  
     
25.  
    return (USBD_OK);
26.  
    /* USER CODE END 3 */
27.  
    }

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

1.  
   #define ADDR_FLASH_SECTOR_0 ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbyte */
2.  
   #define ADDR_FLASH_SECTOR_1 ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbyte */
3.  
   #define ADDR_FLASH_SECTOR_2 ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbyte */
4.  
   #define ADDR_FLASH_SECTOR_3 ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbyte */
5.  
   #define ADDR_FLASH_SECTOR_4 ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbyte */
6.  
   #define ADDR_FLASH_SECTOR_5 ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbyte */
7.  
   #define ADDR_FLASH_SECTOR_6 ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbyte */
8.  
   #define ADDR_FLASH_SECTOR_7 ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbyte */
9.  
   #define ADDR_FLASH_SECTOR_8 ((uint32_t)0x08080000) /* Base @ of Sector 8, 128 Kbyte */
10.  
    #define ADDR_FLASH_SECTOR_9 ((uint32_t)0x080A0000) /* Base @ of Sector 9, 128 Kbyte */
11.  
    #define ADDR_FLASH_SECTOR_10 ((uint32_t)0x080C0000) /* Base @ of Sector 10, 128 Kbyte */
12.  
    #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:

1.  
   /**
2.  
   * @brief Gets the sector of a given address
3.  
   * @param Address: Flash address
4.  
   * @retval The sector of a given address
5.  
   */
6.  
   static uint32_t GetSector(uint32_t Address)
7.  
   {
8.  
   uint32_t sector = 0;
9.  
    
10.  
    if((Address < ADDR_FLASH_SECTOR_1) && (Address >= ADDR_FLASH_SECTOR_0))
11.  
    {
12.  
    sector = FLASH_SECTOR_0;
13.  
    }
14.  
    else if((Address < ADDR_FLASH_SECTOR_2) && (Address >= ADDR_FLASH_SECTOR_1))
15.  
    {
16.  
    sector = FLASH_SECTOR_1;
17.  
    }
18.  
    else if((Address < ADDR_FLASH_SECTOR_3) && (Address >= ADDR_FLASH_SECTOR_2))
19.  
    {
20.  
    sector = FLASH_SECTOR_2;
21.  
    }
22.  
    else if((Address < ADDR_FLASH_SECTOR_4) && (Address >= ADDR_FLASH_SECTOR_3))
23.  
    {
24.  
    sector = FLASH_SECTOR_3;
25.  
    }
26.  
    else if((Address < ADDR_FLASH_SECTOR_5) && (Address >= ADDR_FLASH_SECTOR_4))
27.  
    {
28.  
    sector = FLASH_SECTOR_4;
29.  
    }
30.  
    else if((Address < ADDR_FLASH_SECTOR_6) && (Address >= ADDR_FLASH_SECTOR_5))
31.  
    {
32.  
    sector = FLASH_SECTOR_5;
33.  
    }
34.  
    else if((Address < ADDR_FLASH_SECTOR_7) && (Address >= ADDR_FLASH_SECTOR_6))
35.  
    {
36.  
    sector = FLASH_SECTOR_6;
37.  
    }
38.  
    else if((Address < ADDR_FLASH_SECTOR_8) && (Address >= ADDR_FLASH_SECTOR_7))
39.  
    {
40.  
    sector = FLASH_SECTOR_7;
41.  
    }
42.  
    else if((Address < ADDR_FLASH_SECTOR_9) && (Address >= ADDR_FLASH_SECTOR_8))
43.  
    {
44.  
    sector = FLASH_SECTOR_8;
45.  
    }
46.  
    else if((Address < ADDR_FLASH_SECTOR_10) && (Address >= ADDR_FLASH_SECTOR_9))
47.  
    {
48.  
    sector = FLASH_SECTOR_9;
49.  
    }
50.  
    else if((Address < ADDR_FLASH_SECTOR_11) && (Address >= ADDR_FLASH_SECTOR_10))
51.  
    {
52.  
    sector = FLASH_SECTOR_10;
53.  
    }
54.  
    else
55.  
    {
56.  
    sector = FLASH_SECTOR_11;
57.  
    }
58.  
     
59.  
    return sector;
60.  
    }

 

flash写入操作

1.  
   uint16_t MEM_If_Write_FS(uint8_t *src, uint8_t *dest, uint32_t Len)
2.  
   {
3.  
   /* USER CODE BEGIN 3 */
4.  
   uint32_t i = 0;
5.  
    
6.  
   for(i = 0; i < Len; i+=4)
7.  
   {
8.  
   /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
9.  
   be done by byte */
10.  
    if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, (uint32_t)(dest+i), *(uint32_t*)(src+i)) == HAL_OK)
11.  
    {
12.  
    /* Check the written value */
13.  
    if(*(uint32_t *)(src + i) != *(uint32_t*)(dest+i))
14.  
    {
15.  
    /* Flash content doesn't match SRAM content */
16.  
    return 2;
17.  
    }
18.  
    }
19.  
    else
20.  
    {
21.  
    /* Error occurred while writing data in Flash memory */
22.  
    return 1;
23.  
    }
24.  
    }
25.  
    return (HAL_OK);
26.  
    /* USER CODE END 3 */
27.  
    }

flash读出操作

1.  
   uint8_t *MEM_If_Read_FS (uint8_t *src, uint8_t *dest, uint32_t Len)
2.  
   {
3.  
   /* Return a valid address to avoid HardFault */
4.  
   /* USER CODE BEGIN 4 */
5.  
   uint32_t i = 0;
6.  
   uint8_t *psrc = src;
7.  
    
8.  
   for(i = 0; i < Len; i++)
9.  
   {
10.  
    dest[i] = *psrc++;
11.  
    }
12.  
    return HAL_OK;
13.  
     
14.  
    /* USER CODE END 4 */
15.  
    }