42、双单片机串口例子.rar

//两个单片机通讯，使用中断法 #include <reg51.h> #define uchar unsigned char #define uint unsigned int #define key_port P1 #define dis_port P2 void main (void) { uchar key_in=0xff; SCON=0x50; //MODER1,REN=1; TMOD=0x20; //TIMER1 MODER2; TH1=0xf3; //bode=2400 TL1=0xf3; ET1=1; TR1=1; EA=1; ES=1; while(1) { if (key_in != key_port) { key_in = key_port; SBUF=key_in; } } } void get_disp (void) interrupt 4 using 0 { if (RI) //如果是串口输入引起中断 { dis_port = SBUF; RI=0; } else TI=0; //否则就是串口输出引起的中断 }