void Com_Out(uchar Com_data0, uchar Com_data1, uchar Com_data2)  
{                      
    Com_TXD(0x1b);                                           
    Com_TXD(0x5e);
    Com_TXD(Com_data0);
    Com_TXD(Com_data1);
    Com_TXD(Com_data2);
}
void main(void)
{

  
  TMOD=0x20;   //记数方式2
  TL1=0xfA;        
  TH1=0xfA;      //9600波特率
  SCON=0xd8;
  PCON=0x80;
  TR1=1;

   while(1)
    {
        while(P3_2==0)
        {
            while(P3_2==0);
            Com_Out(0x20,0x00,0x01);
        }
    }

}
按下P3-2后为何串口调试助手会出现9B AE 80 80 81?为什么不是1b 5e 20 00 01？ 晶振是12M