2020年12月09日 | STM32F7xx —— 内部flash

这个就没什么好说的了，直接上代码了，主要封装了三个函数，擦除，写flash，读flash。

// STM32F767IGT6: 1M flash

// STM32F767ZIT6: 2M flash

#define ADDR_FLASH_SECTOR_0     ((uint32_t)0x08000000) /* Base @ of Sector 0, 32 Kbytes */

#define ADDR_FLASH_SECTOR_1     ((uint32_t)0x08008000) /* Base @ of Sector 1, 32 Kbytes */

#define ADDR_FLASH_SECTOR_2     ((uint32_t)0x08010000) /* Base @ of Sector 2, 32 Kbytes */

#define ADDR_FLASH_SECTOR_3     ((uint32_t)0x08018000) /* Base @ of Sector 3, 32 Kbytes */

#define ADDR_FLASH_SECTOR_4     ((uint32_t)0x08020000) /* Base @ of Sector 4, 128 Kbytes */

#define ADDR_FLASH_SECTOR_5     ((uint32_t)0x08040000) /* Base @ of Sector 5, 256 Kbytes */

#define ADDR_FLASH_SECTOR_6     ((uint32_t)0x08080000) /* Base @ of Sector 6, 256 Kbytes */

#define ADDR_FLASH_SECTOR_7     ((uint32_t)0x080C0000) /* Base @ of Sector 7, 256 Kbytes */

#ifdef STM32F767ZIT6

#define ADDR_FLASH_SECTOR_8     ((uint32_t)0x08100000) /* Base @ of Sector 8, 256 Kbytes */

#define ADDR_FLASH_SECTOR_9     ((uint32_t)0x08140000) /* Base @ of Sector 9, 256 Kbytes */

#define ADDR_FLASH_SECTOR_10    ((uint32_t)0x08180000) /* Base @ of Sector 10, 256 Kbytes */

#define ADDR_FLASH_SECTOR_11    ((uint32_t)0x081C0000) /* Base @ of Sector 11, 256 Kbytes */

#endif

// 获取要擦除扇区编号

static uint32_t flash_sector_number(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;

  }

#ifdef STM32F767ZIT6

  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 if((address < 0x081C0000) && (address >= ADDR_FLASH_SECTOR_11))

  {

    sector = FLASH_SECTOR_11;

  }

#else

  else if(address >= ADDR_FLASH_SECTOR_7)

  {

    sector = FLASH_SECTOR_6;

  }

#endif

  return sector;

}

// 擦除指定扇区数据 仔细的朋友会发现count没有用到，这里可以任意更改，我是为了兼容F1的命名。

void SocFlashErase(uint32_t addr, uint8_t count)

{

  FLASH_EraseInitTypeDef flash_erase;

  uint32_t flash_error;

  HAL_FLASH_Unlock();

  flash_erase.TypeErase = FLASH_TYPEERASE_SECTORS;  // 擦除类型，扇区擦除

  flash_erase.Sector = flash_sector_number(addr);   // 要擦除的扇区

  flash_erase.NbSectors = 1;                        // 一次只擦除一个扇区 这里可以使用参数的count 为了防止错误操作这里写成1

  flash_erase.VoltageRange = FLASH_VOLTAGE_RANGE_3; // 电压范围，VCC=2.7~3.6V之间!!

  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |

                         FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_ERSERR | FLASH_FLAG_BSY);

  HAL_FLASHEx_Erase(&flash_erase, &flash_error);

  FLASH_WaitForLastOperation(50000);

  HAL_FLASH_Lock();

}

uint8_t SocFlashWrite(uint32_t addr, uint8_t *buffer, uint32_t length)

{

  uint32_t i;

  uint16_t data = 0;

  if (length == 0)

  {

    return 0;

  }

  HAL_FLASH_Unlock();

  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |

                         FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_ERSERR | FLASH_FLAG_BSY);

  // 按半字编程

  for (i = 0; i < length; i += 2)

  {

    data = (*(buffer + i + 1) << 8) + (*(buffer + i));

    HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, (uint32_t)(addr + i), data);

  }

  HAL_FLASH_Lock();

  return 0;

}

uint32_t SocFlashRead(uint32_t addr, uint8_t *buffer, uint32_t length)

{

  memcpy(buffer, (void *)addr, length);

  return length;

}