交通灯C语言程序交通灯C语言程序,AT89S52....doc

交通灯//================================== //==== 交通灯 C 语言程序//==== 作者: 2009 的竹蜻蜓//==== 时间: 2009-4-26 //====E-MAIL:guangxian616@ //================================== #include<> #define uchar unsigned char #define time 50000 #define ON 0 #define OFF 1 sbit NSB=P1^5; // 南北绿灯 sbit NSY=P1^4; // 南北黄灯 sbit NSR=P1^3; // 南北红灯 sbit EWB=P1^2; // 东西绿灯 sbit EWY=P1^1; // 东西黄灯 sbit EWR=P1^0; // 东西红灯 sbit P27=P2^7; sbit P26=P2^6; sbit P23=P2^3; sbit P22=P2^2; /*=============== 倒计时=========================*/ uchar N=15,Y=12,Z=15,M=27,G=30,U=30; uchar C50ms; uchar seg=1; void InitialT1(void) { ET1=0;TMOD=0x10; TH1=(65536-time)>>8; TL1=(65536-time)&0xff; TR1=1; ET1=1; EA=1; } void ISRT1(void) interrupt 3 { TR1=0; TH1=(65536-time)>>8; TL1=(65536-time)&0xff; TR1=1; C50ms++; if(C50ms>19) { N--; M--; Y--; Z--; G--; U--; C50ms=0; }} /*================= 延时=======================*/ void Delay10uS(uchar second) { int i; while((second--)!=0) { for(i=0;i<3;i++){;} }} /*==================led 控制========================*/ uchar discode[10]={0xC0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; void display1(uchar num1,uchar num2) { P0=discode[num1]; P22=ON; Delay10uS(1); P22=OFF; // 控制南 led 显示 P0=discode[num2]; P23=ON; Delay10uS(1); P23=OFF; } void display2(uchar num3,uchar num4) { P0=discode[num3]; P26=ON; Delay10uS(1); P26=OFF; // 控制东西 led 显示 P0=discode[num4]; P27=ON; Delay10uS(1); P27=OFF; } main() { int