关于I2C中Addr不等于0，且NumOfPage等于0写入代码问题的请教

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电梯直达

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那个叫黑的人|

楼主 | 2019-11-13 17:16 | 只看该作者回帖奖励

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ADDR, 代码, ge, FPAG, I2c

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)
{
   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();
   }
}
  }
}

如以上代码所示，无论Addr是否为0，NumOfPage只要为0都是按照
{I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();}代码写进去的。这样会存在一个问题。假如addr=7，count=7时，会不会覆盖掉6个数据？

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关于I2C中Addr不等于0，且NumOfPage等于0写入代码问题的请教

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