使用E8ax先把程序当入R5F212B里，然后去除E8a连线，连接电源和PC机串口，无论是超级终端或者串口工具，上电后均无反应！  
我是负责软件部分的。请哪位大侠帮忙分析问题出在哪？是否要把PD1_6清零，然后把CKDIR设为1接外部时钟？先谢了！


#include  "sfr_r82b.h"

void Initial(void);

void UART1_SendByte();
void UART1_ReceiveByte();

 

unsigned int recevie_data;  

void UART1_SendByte(unsigned char ch)    //UART1 transmite
{
    ti_u1c1 =0;

    u1tb = ch;
 
    while(!ti_u1c1);
 
 ti_u1c1 =0;

}
void UART1_ReceiveByte(void)     //UART1 receive
  while(!ri_u1c1);
  if(ri_u1c1)
  {
   ri_u1c1 = 0;
     recevie_data = u1rb;
     p2 = recevie_data;
 }
 
}

 

void main(void)
{
  Initial();
 
 UART1_SendByte('a');
 while(1)
 {
     UART1_ReceiveByte();
   } 
}
void Initial(void)
{
 unsigned char i,j,temp;
  asm(" fclr i"); //i=0,disable global interrupt
 prc0 = 1; //enable configre oscillator mode
 
 fra0 = 0b00000011;//internal high oscillator start 
 cm13=1;//xin-xout oscillator
 cm10=0;
 
 cm07=0;
 cm06=0;

 cm16=0;//main oscillator no prescaler
 cm17=0;
 asm("nop");
 asm("nop");
 asm("nop");
 asm("nop");
 asm("nop"); 
 
 cm05=0;
 ocd2=0;

    prc0 = 0;//inhibit
       
                                       //I/O direction,'1'=output, '0'=input

 prcr |= 0b00000100;//prcr.2=1,enable port direction configuration
    p0 = 0b00000000;
    pd0 = 0b11111111;//LCD-data0-7
 
 p1 = 0b00000000;
 pd1 = 0b11011111;//QUIT DA RXD TXD CLK DROP Dog-1 KEYI1
 
 p2 = 0b00000000;
 pd2 = 0b11111111;//CLKD6 CLKD5 CLKD4 CLKD3 CLKD2 CLKD1 DAT1 DAT2
 p2drr= 0b11111111;//Port2 drive capacity register.'1'=High,'0'=Low
 
 p3 = 0b00000000;
 pd3 = 0b00001111;//NC NC NC NC NC key_line3 key_line2 key_line1
 
 p4 = 0b00000000;
 pd4 = 0b00111000;//XOUT XIN NC DAT3 NC NO NO NO
 
 p5 = 0b00000000;
 pd5 = 0b00011001;//NO NO NO STCP SHCP key2_in key1_in CLKD7
 
 
 p8 = 0b00000000;
 pd8 =0b11111000; //NC R/D CLKD0 NC NC KEY3 KEY2 KEY1

 
//------------------------------------------------------------------------------------------
    u1pinsel = 1;              // enable UART1
 
 p6 = 0b00000000;             
    pd6 &= 0x79;               //0|1|1|1|1|0|0|1 ;p6_6 Txd1 output,p6_7 Rxd1  Input
 
 u1mr = 0x05;               // 8 bits;1 stop bit;disable parity
 u1c0 = 0x00;                //uart1 select f1
 u1c1 =0x00;                //disable transimit.receive.continuous receive

 u1brg = 77;               // 9600 bits = 12MHz/16*(brg+1)
 
 s1tic = 0x05;              // uart1 TI interrupt level 5
 s1ric = 0x05;              // uart1 RI interrupt level 5
 
 te_u1c1 = 1;                //enable uart1 transmit
 re_u1c1 = 1;               //enable uart1 receive
//------------------------------------------------------------------------------------------ 

  asm(" fset i"); //i=1,enable interrupt  
}