基于51单片机的交通信号灯系统本科毕设论文

{

P1=State[2]; //SN左拐绿灯亮，EW红灯 ShuMa_Display(); }

P1=0xFF;

while(Time_SN>=0) { Flag_SN_Yellow=1; //SN开黄灯信号位 Flag_EW_Yellow=1; ShuMa_Display(); }

}

void state3() {

/***********赋值*********/ EW=EW1; SN=SN1; EWL=EWL1; SNL=SNL1;

/*******SN禁止，EW通行状态**********/

SN_ManRed=0; //SN人行道禁止 SN_ManGreen=1; EW_ManRed=1;

EW_ManGreen=0; //EW人行道通行 Flag_SN_Yellow=0; //SN关黄灯显示信号 Flag_EW_Yellow=0;//EW关黄灯显示信号 Time_EW=SN; Time_SN=EW;

while(Time_EW>=5)

{ P1=State[4];//EW通行，SN红灯 ShuMa_Display(); }

P1=0Xff;

while(Time_EW>=0) { Flag_EW_Yellow=1;//EW开黄灯信号位 SN_Red=0;

//P1=P1|0x0B; //保持SN红灯

ShuMa_Display(); } }

void state4() {

/***********EW方向左拐状态**************/ SN_ManRed=0; //SN人行道禁止 SN_ManGreen=1; EW_ManRed=0; //EW人行道禁止

EW_ManGreen=1;

Flag_SN_Yellow=0; //SN关黄灯显示信号 Flag_EW_Yellow=0;//EW关黄灯显示信号 Time_EW=EWL; while(Time_EW>=5) { P1=State[6]; //EW左拐绿灯亮，SN红灯 ShuMa_Display(); }

P1=0Xff;

while(Time_EW>=0) { Flag_EW_Yellow=1; //EN开黄灯信号位 Flag_SN_Yellow=1; ShuMa_Display(); } /***********赋值*********/ EW=EW1; SN=SN1;

EWL=EWL1;

SNL=SNL1; }

/****************定时器0初始化函数***************/ void timer0_init() {

TMOD=0x01; //定时器0工作方式1

TH0=(65536-10000)/256; //装初值

TL0=(65536-10000)%6; EA=1; //开总中断

ET0=1;//开定时器0中断 TR0=1;//启动定时器 }

/*******************定时器0服务中断函数***********/ void timer() interrupt 1 {

uchar t; TH0=(65536-50000)/256; TL0=(65536-50000)%6; t++; if(shezhi1==0) { EW1=60; SN1=40; EWL1=19; SNL1=19;

write(10,60); //24C02写操作 write(11,40); write(12,19); write(13,19); }

if(shezhi2==0) { EW1=50; SN1=40; EWL1=9; SNL1=9; //write(10,60); //write(11,50); //write(12,9); //write(13,9); }

if(stop1==0) {

P0=table[0];

EW_ShuMa2=0; EW_ShuMa1=0; SN_ShuMa2=0; SN_ShuMa1=0; P1=0XBB;

EW_ManGreen=1; SN_ManGreen=1; EW_ManRed=0; SN_ManRed=0; while(1);

}

if(t==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(t==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; } t=0; } }

24c02的.h程序

#define uchar unsigned char