stm32f0 spi读写flash问题

/*******************************************************************************

* Function Name  : SPI_FLASH_BufferWrite

* Description    : Writes block of data to the FLASH. In this function, the

*                  number of WRITE cycles are reduced, using Page WRITE sequence.

* Input          : - pBuffer : pointer to the buffer  containing the data to be

*                    written to the FLASH.

*                  - WriteAddr : FLASH's internal address to write to.

*                  - NumByteToWrite : number of bytes to write to the FLASH.

* Output         : None

* Return         : None

*******************************************************************************/

void SPI_FLASH_BufferWrite(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)

{

  uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;



  Addr = WriteAddr % SPI_FLASH_PageSize;

  count = SPI_FLASH_PageSize - Addr;

  NumOfPage =  NumByteToWrite / SPI_FLASH_PageSize;

  NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;



  if (Addr == 0) /* WriteAddr is SPI_FLASH_PageSize aligned  */

  {

    if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */

    {

      SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);

    }

    else /* NumByteToWrite > SPI_FLASH_PageSize */

    {

      while (NumOfPage--)

      {

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);

        WriteAddr +=  SPI_FLASH_PageSize;

        pBuffer += SPI_FLASH_PageSize;

      }



      SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);

    }

  }

  else /* WriteAddr is not SPI_FLASH_PageSize aligned  */

  {

    if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */

    {

      if (NumOfSingle > count) /* (NumByteToWrite + WriteAddr) > SPI_FLASH_PageSize */

      {

        temp = NumOfSingle - count;



        SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);

        WriteAddr +=  count;

        pBuffer += count;



        SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);

      }

      else

      {

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);

      }

    }

    else /* NumByteToWrite > SPI_FLASH_PageSize */

    {

      NumByteToWrite -= count;

      NumOfPage =  NumByteToWrite / SPI_FLASH_PageSize;

      NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;



      SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);

      WriteAddr +=  count;

      pBuffer += count;



      while (NumOfPage--)

      {

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);

        WriteAddr +=  SPI_FLASH_PageSize;

        pBuffer += SPI_FLASH_PageSize;

      }



      if (NumOfSingle != 0)

      {

        SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);

      }

    }

  }

}