转： stm32f4 关于内部flash存储数据问题

这里的flash的在编程钱如果这一个地址已经写过了请先擦除这个地址，因为现在stm32f4的的flash分为11个部分，每个擦除是按照每个部分一起擦除，因为这你的对每个快的做一个缓冲区才行。
我的代码如下：
void get_from_flash(void)
{
delay_ms(2);
OwnFlashReady(0x08008000,getflashdata_buf,100);
// SPI_FLASH_BufferRead(getflashdata_buf, 0x000000, 100);        //??????
// SPI_FLASH_ChipErase();//????flash????????
memmove(&RTU_Basedata_Only,&getflashdata_buf[0],18);
memmove(&BaseData01,&getflashdata_buf[18],21);
memmove(&gx_options01[0],&getflashdata_buf[39],60);
}


void OwnFlashSave(uint32_t save_addr,uint8_t *p,uint16_t number)
{
uint32_t StartSector,EndSector,i, save_addr_temp;
StartSector = GetSector(save_addr);
  EndSector = GetSector(save_addr+number);
save_addr_temp = save_addr;
FLASH_Unlock();
  FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |
                  FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR);

//????flash
for (i = StartSector; i<=EndSector; i += 8)
  {
      while (FLASH_EraseSector(i, VoltageRange_3) != FLASH_COMPLETE)
      {
      }
  }        //????????????×÷?????????????????????í?ó??
   while (save_addr < number+save_addr_temp)
  {
    if (FLASH_ProgramByte(save_addr, *p++) == FLASH_COMPLETE)  
    {
      save_addr = save_addr + 1;
    }
    else
    {
      while (1)
      {
      }
    }
  }
   FLASH_Lock();
}

// void OwnFlashErasure()


void OwnFlashReady(uint32_t read_addr,uint8_t * read_buf,uint16_t read_number)
{
uint32_t Address_ready;
Address_ready = read_addr;
   while (Address_ready < read_addr+read_number)
  {
    *read_buf++ = (*(__IO uint8_t*)Address_ready);
    Address_ready = Address_ready + 1;
  }  
}


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;
}

代码不是很复杂，但是如果没有弄懂的话还是要费些时间的，希望各位同学多多指教。

分享完成，，，，，，，，，，，