51单片机双机通讯问题
实现不了双机通讯功能，按键发送数据，另外一块单片机不显示，为什么呐？程序有什么问题吗？求大神指教下！！！
#include "reg51.h"
#define S1 0x0e
#define S2 0x0d
#define S3 0x0b
#define S4 0x07
void delay(unsigned int t)
{
unsigned int i,j;
for(i=0;i<t;i++)//延时t个1ms
for(j=0;j<112;j++);//延时约1ms
}
unsigned char code disptab[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,
0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0xFF};
unsigned char code bittab[] = {0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};
unsigned char ScanKey(void)
{
unsigned char key;
if((P3&0x0f)==0x0f) return(0xff);
delay(30);
if((P3&0x0f)==0x0f) return(0xff);
key=P3&0x0f;
while((P3&0x0f)!=0x0f);//等待弹出
//beep();
return(key);
}
void initUart(void)
{
TMOD=0x20;
SCON=0x50;
TH1=0xfd;
TL1=0xfd;
TR1=1;
ES=1;
}
void uart(void) interrupt 4
{
if(RI)
{
RI=0;
P0=disptab[SBUF];
P2=0Xfe;
}
}
void Sendchar(char c)
{
TI=0;//清发送标志
SBUF=c;//发送字符送发送缓冲区
while(TI==0);//等待发送完成
TI=0;//清发送标志
}
void main(void)
{
unsigned char key;
key=ScanKey();
initUart();
EA=1;
switch(key)
{
case S1:Sendchar(1);break;
case S2:Sendchar(2);break;
case S3:Sendchar(3);break;
case S4:Sendchar(4);break;
}
}
#include <reg51.h> // 发送 供参考
sbit k0=P1^0; // 这是 10 按键
sbit k1=P1^1; // 发送 0 - 9 的编码
sbit k2=P1^2;
sbit k3=P1^3;
sbit k4=P1^4;
sbit k5=P1^5;
sbit k6=P1^6;
sbit k7=P1^7;
sbit k8=P3^3;
sbit k9=P3^4;
sbit led=P3^5;
bit y0,y1,y2,y3,y4,y5,y6,y7,y8,y9;
void main (void)
{
SCON = 0x50; // REN=1允许串行接受状态，串口工作模式1
TMOD|= 0x20; // 定时器工作方式2
PCON|= 0x80; // 数据位8、停止位1。效验位无 (12M)
TH1 = 0xFD; // TH1 = 0xFD; 波特率 9600
TL1 = 0xFD;
TR1 = 1;
while(1)
{
if(k0==0 && y0==0) { y0=1; SBUF=0xc0; led=0; }
if(k0==1 ) { y0=0; }
if(k1==0 && y1==0) { y1=1; SBUF=0xf9; led=0; }
if(k1==1 ) { y1=0; }
if(k2==0 && y2==0) { y2=1; SBUF=0xa4; led=0; }
if(k2==1 ) { y2=0; }
if(k3==0 && y3==0) { y3=1; SBUF=0xb0; led=0; }
if(k3==1 ) { y3=0; }
if(k4==0 && y4==0) { y4=1; SBUF=0x99; led=0; }
if(k4==1 ) { y4=0; }
if(k5==0 && y5==0) { y5=1; SBUF=0x92; led=0; }
if(k5==1 ) { y5=0; }
if(k6==0 && y6==0) { y6=1; SBUF=0x82; led=0; }
if(k6==1 ) { y6=0; }
if(k7==0 && y7==0) { y7=1; SBUF=0xf8; led=0; }
if(k7==1 ) { y7=0; }
if(k8==0 && y8==0) { y8=1; SBUF=0x80; led=0; }
if(k8==1 ) { y8=0; }
if(k9==0 && y9==0) { y9=1; SBUF=0x90; led=0; }
if(k9==1 ) { y9=0; }
if(led==0)
{
while(!TI);
TI=0;
led=1;
}
}
}
#include <reg51.h> // 接收
void main (void)
{
SCON = 0x50; // REN=1允许串行接受状态，串口工作模式1
TMOD|= 0x20; // 定时器工作方式2
PCON|= 0x80; // 数据位8、停止位1。效验位无 (12M)
TH1 = 0xFD; // TH1 = 0xFD; 波特率 9600
TL1 = 0xFD;
TR1 = 1;
ES = 1; // 开串口中断
EA = 1; // 开总中断
P1 = 0xbf;
while(1)
{
}
}
void chuankou(void) interrupt 4
{
if(RI==1)
{
RI = 0;
TI = 0;
P1 = SBUF; // 显示 0 - 9
}
}
A机：
#include<AT89X52.H> //A机
#define uchar unsigned char
#define uint unsigned int
uchar tmp;
#define Leds P1
void main (void)
{
SCON=0x50;
TMOD=0x20;
TH1=0xf3;
TL1=0xf3;
ET1=0;
TR1=1;
ES=1;
EA=1;
Leds=0xff；
while(1)
{
Leds=tmp;
}
}
void ser(void) interrupt 4 using 0
{
if(RI)
{
RI=0;tmp=SBUF;
}
else TI=0;
}
B机：
#include<AT89X52.H>
#define uchar unsigned char
#define uint unsigned int
#define key_port P1
void delay(unsigned char delay_time)
{
Unsigned char i;
while(delay_time--)
for(i=0;i<125;i++);
}
void main(void)
{
uchar key_in=0xff;
SCON=0x50;
TMOD=0x20;
TH1=0xf3;
TL1=0xf3;
ET1=0;TR1=1;
P2=0xff;
EA=1;ES=1;
while(1)
{
if(key_port !=0xff)
{
delay(10);
if(key_port !=0xff)
{
Key_in=key_port;
SBUF=key_in;
}
}
}
}
void ser(void) interrupt 4 using 0
{
if(RI)
{
RI=0;
}
else TI=0;
{
unsigned char key;
initUart();
EA=1;
while(1)
{key=scanKey();
switch…
}
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