TMS28335 SCIC串口问题

采用官方例子程序

Uint16 data[42]={40,48,51,48,48,48,48,48,48,48,55,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,51,52,48,48,65,67,41};

while(1)

   {

     for(i=0;i<42;i++)

     {

      SendChar = data[i];

      scic_xmit(SendChar);

      while(ScicRegs.SCIFFTX.bit.TXFFST != 0);

     }

这样发送数据，一会正确，一会就出现很多问号

不知道是什么原因？

(03000000070000000000000000000000003400AC)(03000000070000000000000000000000003400AC)(03000000070000000000000000000000003400AC)(03000000070000000000000000000000003400AC)(03000000070000000000000000000000003400AC)(030000000700?00?00?00?AC?000?00?00?000?00?00?00?00?00?34?03?07?00?00?00?)(?00?0?00?00?AC?0?00?0?00?00?0?00?00?00?34?0?07?0?00?00?)?00?0?00?00?A?00?0?0?00?0?0?00?0?0?34?0?0?00?0?0?)?0?00?0?0?AC?0?00?0?0?00?0?0?0?00?3?0?0?00?0?0?)?0?00??0?A?0?0?0?0?0?0?0?0?0?3?0?0?0?0?0?)?0?0?0?0?AC?0??0?0?0?0?0?0?0??0?0?0?0?0?)?0??0?0?A?0??0?0?0??0?0??3?0?0??0?0?)?0?

下面问号部分数据就都是不对的 查不出原因在哪？