51单片机红绿灯 仿真+代码

#include<reg51.h> sbit p30=P3^0; sbit p31=P3^1; sbit p34=P3^4; sbit p35=P3^5; sbit p36=P3^6; sbit p37=P3^7; sbit p00=P0^0; sbit p01=P0^1; sbit p02=P0^2; sbit p03=P0^3; sbit p04=P0^4; sbit p05=P0^5; sbit p06=P0^6; sbit p07=P0^7; //LED字模 char LedNum[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //南北初始化等待时间 short initNbGreen=30; short initNbRed=30; //南北灯标志:0 绿灯 1 红灯 2黄灯 short NbFlag=0; //南北等待时间 short NbTime=30; //东西初始化等待时间 short initDxGreen=30; short initDxRed=30; //东西灯标志:0 绿灯 1 红灯 2黄灯 short DxFlag=1; //东西等待时间 short DxTime=33; //夜间模式和绿灯模式 char nightMode=0; char greenMode=0; //延时函数 void delay(unsigned short N) //@12.000MHz { for(;N>0;N--){ unsigned char i, j; i = 2; j = 239; do { while (--j); } while (--i); }; } //定时器0 减少等待时间 int count=0; int countYellow=0; void addTime() interrupt 1{ if(nightMode==1){ p00=0;p02=0; p03=0;p05=0; if(++countYellow%1000==0){ countYellow=0;p01=!p01;p04=!p04; } return; }else if(greenMode==1){ p00=1;p01=0;p02=0; p03=0;p04=0;p05=1; return; } if(count%2500==0){ //控制黄灯闪烁 if(NbFlag==2){ p01=!p01; } if(DxFlag==2){ p04=!p04; } } if(++count==5000){ count=0; NbTime--; DxTime--; if(NbTime==0){ if(NbFlag==0){ NbFlag=2; p00=0;p01=1;p02=0; NbTime=3; }else if(NbFlag==1){ NbFlag=0; p00=1;p01=0;p02=0; NbTime=initNbGreen; }else if (NbFlag==2){ NbFlag=1; p00=0;p01=0;p02=1; NbTime=initNbRed+3; } } if(DxTime==0){ if(DxFlag==0){ DxFlag=2; p03=0;p04=1;p05=0; DxTime=3; }else if(DxFlag==1){ DxFlag=0; p03=1;p04=0;p05=0; DxTime=initDxGreen; }else if (DxFlag==2){ DxFlag=1; p03=0;p04=0;p05=1; DxTime=initDxRed+3; } } } } //外部中断0 改变红灯时间 void changeNbRed() interrupt 0{ if(p36==0){ if(initNbGreen>3){ initNbRed++; initNbGreen--; initDxGreen++; initDxRed--; } }else if(p37==0){ if(initNbRed>3){ initNbRed--; initNbGreen++; initDxGreen--; initDxRed++; } } } //用于缓存切换模式前红绿灯的状态 char tempLed[6]={0}; //外部中断1 切换模式 void changeMode() interrupt 2{ if(p06==0){ if(greenMode==0){ tempLed[0]=p00;tempLed[1]=p01;tempLed[2]=p02;tempLed[3]=p03;tempLed[4]=p04;tempLed[5]=p05; }else{ p00=tempLed[0];p01=tempLed[1];p02=tempLed[2];p03=tempLed[3];p04=tempLed[4];p05=tempLed[5]; } greenMode=!greenMode; }else if(p07==0){ if(nightMode==0){ tempLed[0]=p00;tempLed[1]=p01;tempLed[2]=p02;tempLed[3]=p03;tempLed[4]=p04;tempLed[5]=p05; }else{ p00=tempLed[0];p01=tempLed[1];p02=tempLed[2];p03=tempLed[3];p04=tempLed[4];p05=tempLed[5]; } nightMode=!nightMode; } } void showNB(){ if(nightMode==1 || greenMode==1){ return ; } p30=0; p31=1; P2=LedNum[NbTime%10]; delay(1); P2=0xff; p30=1; p31=0; P2=LedNum[NbTime/10]; delay(1); P2=0xff; } void showDX(){ if(nightMode==1 || greenMode==1){ return ; } p34=0; p35=1; P1=LedNum[DxTime%10]; delay(1); P1=0xff; p34=1; p35=0; P1=LedNum[DxTime/10]; delay(1); P1=0xff; } int main(void){ //中断初始化 TMOD=0x02; TR0=1;IT0=1;IT1=1; //TCON寄存器 EA=1;ET0=1;EX0=1;EX1=1; //IE寄存器 TL0=0x38;TL1=0x38; //初始化时间 p00=1;p01=0;p02=0; //南北初始化为绿灯 p03=0;p04=0;p05=1; //东西初始化为红灯 while(1){ showNB(); showDX(); } }