28035 I2C 读写2个数据正常，读写4个数据时不正常

您好，我现在使用的是28035官方IIC例子，没有改动，EEPROM是24C02,现在调试过程遇到一个问题，正常写2个数据，读回2个数据 都正常，比如写0x01,0x02，读回来也是0x01,0x02，但是在程序中我写4个数据0x01,0x02,0x03,0x04后，在读回来后返回0x02,0x03,0x04,0x04，读回来的值不对，slave地址：0x50，数据地址：0x00，读写数据地址相同，使用SCD和ARDY中断方式。下面是程序，哪位大虾帮忙解决一下

写函数：

Uint16 I2CA_WriteData(struct I2CMSG *msg)
{
   Uint16 i;

   if (I2caRegs.I2CMDR.bit.STP == 1)
   {
      return I2C_STP_NOT_READY_ERROR;
   }

   I2caRegs.I2CSAR = 0x50
   if (I2caRegs.I2CSTR.bit.BB == 1)
   {
      return I2C_BUS_BUSY_ERROR;
   }

   I2caRegs.I2CCNT = msg->NumOfBytes+2;
   I2caRegs.I2CDXR = msg->MemoryHighAddr;
   I2caRegs.I2CDXR = msg->MemoryLowAddr;
   for (i=0; i<msg->NumOfBytes; i++)

 {
      I2caRegs.I2CDXR = *(msg->MsgBuffer+i);
   }

   I2caRegs.I2CMDR.all = 0x6EA0;

   return I2C_SUCCESS;
}

读函数：

Uint16 I2CA_ReadData(struct I2CMSG *msg)
{
   // Wait until the STP bit is cleared from any previous master communication.
   // Clearing of this bit by the module is delayed until after the SCD bit is
   // set. If this bit is not checked prior to initiating a new message, the
   // I2C could get confused.
   if (I2caRegs.I2CMDR.bit.STP == 1)
   {
      return I2C_STP_NOT_READY_ERROR;
   }

   I2caRegs.I2CSAR = msg->SlaveAddress;

   if(msg->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP)
   {
      // Check if bus busy
      if (I2caRegs.I2CSTR.bit.BB == 1)
      {
         return I2C_BUS_BUSY_ERROR;
      }
      I2caRegs.I2CCNT = 2;
      I2caRegs.I2CDXR = msg->MemoryHighAddr;
      I2caRegs.I2CDXR = msg->MemoryLowAddr;
      I2caRegs.I2CMDR.all = 0x2620;//0x2620;   // Send data to setup EEPROM address
   }
   else if(msg->MsgStatus == I2C_MSGSTAT_RESTART)
   {
      I2caRegs.I2CCNT = msg->NumOfBytes; // Setup how many bytes to expect
      I2caRegs.I2CMDR.all = 0x2C20;   // Send restart as master receiver
   }

   return I2C_SUCCESS;
}