单片机双机通信的实例带proteus仿真电路

#include #define uint unsigned int #define uchar unsigned char uchar temp,a,b; void delayms(uint xms) { uint i,j; for(i=xms;i>0;i--) //i=xms即延时约xms毫秒 for(j=110;j>0;j--); } void keyscan() { P1=0xfe; temp=P1; temp=temp&0xf0; if(temp!=0xf0) { delayms(10);