I2C_EE_BufferWrite函数中有BUG

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电梯直达

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zcl_l|

楼主 | 2008-12-2 22:19 | 只看该作者回帖奖励

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buffer, BUG, 函数, WRITE, I2c

!!!标记处应该再区分NumOfSingle > count，可仿照SPI M25P64的例程。不知道我的理解对么？欢迎指正。

void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)
{
  u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;

  Addr = WriteAddr % I2C_PageSize;
  count = I2C_PageSize - Addr;
  NumOfPage =  NumByteToWrite / I2C_PageSize;
  NumOfSingle = NumByteToWrite % I2C_PageSize;

  /* If WriteAddr is I2C_PageSize aligned  */
  if(Addr == 0)
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage == 0)
    {
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else
    {
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;
      }

      if(NumOfSingle!=0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }
  /* If WriteAddr is not I2C_PageSize aligned  */
  else
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage== 0)
    {
      //!!!此处应该区分 NumOfSingle > count !!!!!! 可仿照SPI M25P64的例程
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else
    {
      NumByteToWrite -= count;
      NumOfPage =  NumByteToWrite / I2C_PageSize;
      NumOfSingle = NumByteToWrite % I2C_PageSize;

      if(count != 0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, count);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr += count;
        pBuffer += count;
      }

      while(NumOfPage--)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;
      }
      if(NumOfSingle != 0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }
}

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