单片机8255交通灯程序

交通灯程序/*********************************************************** 十字路口交通灯控制 C 程序***********************************************************/#include <reg51.h>#define uchar unsigned char#define uint unsigned int/*****定义控制位*******************************************/sbit Time_Show_LED2=P2^5; //Time_Show_LED2(直行时间显示)控制位sbit Time_Show_LED1=P2^4; //Time_Show_LED1(直行时间显示)控制位sbit EW_LED2=P2^3; //EW_LED2控制位sbit EW_LED1=P2^2; //EW_LED1控制位sbit SN_LED2=P2^1; //SN_LED2控制位sbit SN_LED1=P2^0; //SN_LED1控制位sbit SN_Yellow=P1^6; //SN黄灯sbit EW_Yellow=P1^2; //EW黄灯sbit EW_ManGreen=P3^0; //EW人行道绿灯sbit SN_ManGreen=P3^1; //SN人行道绿灯sbit Special_LED=P2^6; //交通特殊指示灯sbit Busy_LED=P2^7; //交通繁忙指示灯sbit Nomor_Button=P3^5; //交通正常按键sbit Busy_Btton=P3^6; //交通繁忙按键sbit Special_Btton=P3^7; //交通特殊按键sbit EW_ManRed=P3^3; //EW人行道红灯sbit SN_ManRed=P3^4; //SN人行道红灯bit Flag_SN_Yellow; //SN黄灯标志位bit Flag_EW_Yellow; //EW黄灯标志位char Time_EW; //东西方向倒计时单元char Time_SN; //南北方向倒计时单元uchar EW=60,SN=40,EWL=19,SNL=19; //程序初始化赋值，正常模式uchar EW1=60,SN1=40,EWL1=19,SNL1=19; //用于存放修改值的变量uchar codetable[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; //0-9段选码uchar code S[8]={0x28,0x48,0x18,0x48,0x82,0x84,0x81,0x84};//交通信号灯控制代码/**********************延时子程序**************************/void Delay(uchar a){uchar i;i=a;while(i--){;}}/*****************显示子函数******************************/ void Display(void){uchar h,l;h=Time_EW/10;l=Time_EW%10;P0=table[l];EW_LED2=1; //点亮EW_LED2Delay(2);EW_LED2=0; //熄灭EW_LED2P0=table[h];EW_LED1=1; //点亮EW_LED1Delay(2);EW_LED1=0;h=Time_SN/10;l=Time_SN%10;P0=table[l];SN_LED2=1; //点亮SN_LED2Delay(2);SN_LED2=0;P0=table[h];SN_LED1=1; //点亮SN_LED1Delay(2);SN_LED1=0;h= EW1/10;l= EW1%10;P0=table[l];Time_Show_LED1=1; //点亮Time_Show_LED1Delay(2);Time_Show_LED1=0;P0=table[h];Time_Show_LED2=1; //点亮Time_Show_LED2Delay(2);Time_Show_LED2=0;}/**********************外部0中断服务程序******************/void INT0_srv(void)interrupt 0 using 1{EX0=0; //关中断if(Nomor_Button==0) //测试按键是否按下，按下为正常状态 {EW1=60;SN1=40;EWL1=19;SNL1=19;Busy_LED=0; //关繁忙信号灯Special_LED =0; //关特殊信号灯}if(Busy_Btton==0) //测试按键是否按下，按下为繁忙状态 {EW1=45;SN1=30;EWL1=14;SNL1=14;Special_LED=0; //关特殊信号灯Busy_LED=1; //开繁忙信号灯}if(Special_Btton==0)//测试按键是否按下，按下为特殊状态 {EW1=75;SN1=55;EWL1=19;SNL1=19;Busy_LED=0; //关繁忙信号灯Special_LED =1;//开特殊信号灯}EX0=1; //开中断}/**********************T0中断服务程序*******************/ void timer0(void)interrupt 1 using 1{static uchar count;TH0=(65536-50000)/256;TL0=(65536-50000)%256;count++;if(count==10){if(Flag_SN_Yellow==1) //测试南北黄灯标志位{SN_Yellow=~SN_Yellow;}if(Flag_EW_Yellow==1) //测试东西黄灯标志位{EW_Yellow=~EW_Yellow;}}if(count==20){Time_EW--;Time_SN--;if(Flag_SN_Yellow==1) //测试南北黄灯标志位{SN_Yellow=~SN_Yellow;}if(Flag_EW_Yellow==1) //测试东西黄灯标志位{EW_Yellow=~EW_Yellow;}count=0;}}/*********************主程序开始***********************/ void main(void){Busy_LED=0;Special_LED=0;IT0=1; //INT0负跳变触发TMOD=0x01; //定时器工作于方式1TH0=(65536-50000)/256; //定时器赋初值TL0=(65536-50000)%256;EA=1; //CPU开中断总允许ET0=1; //开定时中断EX0=1; //开外部INTO中断TR0=1; //启动定时while(1){/*******S0状态**********/SN_ManRed=0;SN_ManGreen=1; //SN人行道通行EW_ManRed=1; //EW人行道禁止EW_ManGreen=0;Flag_EW_Yellow=0; //EW关黄灯显示信号Time_EW=EW;Time_SN=SN;while(Time_SN>=5){P1=S[0]; //SN绿灯，EW红灯Display();}/*******S1状态**********/P1=0x00;while(Time_SN>=0){Flag_SN_Yellow=1; //SN开黄灯信号位P1=P1|0x08; //保持EW红灯Display();}/*******S2状态**********/SN_ManRed=1; //SN人行道禁止SN_ManGreen=0;EW_ManRed=1; //EW人行道禁止EW_ManGreen=0;Flag_SN_Yellow=0; //SN关黄灯显示信号Time_SN=SNL;while(Time_SN>=5){P1=S[2]; //SN左拐绿灯亮，EW红灯Display();}/*******S3状态**********/P1=0x00;while(Time_SN>=0){Flag_SN_Yellow=1; //SN开黄灯信号位P1=P1|0x08; //保持EW红灯Display();}/***********赋值*********/EW=EW1;SN=SN1;EWL=EWL1;SNL=SNL1;/*******S4状态**********/SN_ManRed=1; //SN人行道禁止SN_ManGreen=0;EW_ManRed=0;EW_ManGreen=1; //EW人行道通行Flag_SN_Yellow=0; //SN关黄灯显示信号Time_EW=SN;Time_SN=EW;while(Time_EW>=5){P1=S[4]; //EW通行，SN红灯Display();}/*******S5状态**********/P1=0X00;while(Time_EW>=0){Flag_EW_Yellow=1;//EW开黄灯信号位P1=P1|0x80; //保持SN红灯Display();}/*******S6状态**********/SN_ManRed=1; //SN人行道禁止SN_ManGreen=0;EW_ManRed=1; //EW人行道禁止EW_ManGreen=0;Flag_EW_Yellow=0;//EW关黄灯显示信号Time_EW=EWL;while(Time_EW>=5){P1=S[6]; //EW左拐绿灯亮，SN红灯Display();}/*******S7状态**********/P1=0X00;while(Time_EW>=0){Flag_EW_Yellow=1; //EN开黄灯信号位P1=P1|0x80; //保持SN红灯Display();}/***********赋值********/EW=EW1;SN=SN1;EWL=EWL1;SNL=SNL1;}}。