十字路口交通灯

十字路口交通灯 //****************************************************** //Design name: Traffic light on crossroad //Author: Huangxiang //Date: 2007.9.24 //****************************************************** #include <reg51.h> #include <stdio.h> #define uchar unsigned char #define uint unsigned int uchar h; uint r=0; uint s; uchar code dis[]={ 0Xc0,/*0*/ 0Xf9,/*1*/ 0Xa4,/*2*/ 0Xb0,/*3*/ 0X99,/*4*/ 0X92,/*5*/ 0X82,/*6*/ 0Xf8,/*7*/ 0X80,/*8*/ 0X90,/*9*/ 0Xff,/*NULL*/ }; void delay(uint c) { uint i,j; for(i=0;i<c;i++) for(j=0;j<100;j++); } //interrupt 1 void t0(void) interrupt 0 using 1 { delay(2); if(INT0==0) { r++; if(r==2) { r=0; } r%=2; if(r==0) { P0=0xeb; P1=0x00; P2=0xff; }while(1) { if(INT0==0|INT1==0|T0==0) { delay(2); if(INT0==0|INT1==0|T0==0) break; } }; } } //interrupt 2