红绿灯.txt

51实现交通灯控制,可以用于学习发光二极管的用法,也可以直接用于工业设计!是不可多得的源码!

//P1.0：东西红灯
//P1.1：东西黄灯
//P1.2：东西绿灯
//P1.3：南北红灯
//P1.4：南北黄灯
//P1.5：南北绿灯

#include <AT89X51.H>
#define WERed 1
#define WEYellow 2
#define WEGreen 4
#define NSRed 8
#define NSYellow 16
#define NSGreen 32 
#define ON 1
#define OFF 0
unsigned char buffer;
void main(void)
{
    IE=0x8A;
    TMOD=0x11;
    buffer=WERed+NSRed;
    P1=buffer;
    TR0=ON;
    while(1);    
}

void timer0() interrupt TF0_VECTOR
{
    static unsigned char counter=23;
    if(--counter==0)
    {
        if(buffer==WERed+NSRed)
        {
            buffer=WERed+NSGreen;
            P1=buffer;
            counter=153;
        }
        else if(buffer==WERed+NSGreen)
        {
            buffer=WERed+NSYellow;
            P1=buffer;
            counter=23;
            TR1=ON;
        }
        else if(buffer==WERed+NSYellow)
        {
            buffer=WEGreen+NSRed;
            P1=buffer;
            counter=153;
            TR1=OFF;
            TH1=0;
            TL1=0;
        }
        else if(buffer==WEGreen+NSRed)
        {
            buffer=WEYellow+NSRed;
            P1=buffer;
            counter=23;
            TR1=1;
        }
        else if(buffer==WEYellow+NSRed)
        {
            buffer=WERed+NSGreen;
            P1=buffer;
            counter=153;
            TR1=OFF;
            TH1=0;
            TL1=0;
        }
    }
}


void timer1() interrupt TF1_VECTOR
{
    static unsigned char counter=4;
    if(--counter==0)
    {
        counter=4;
        if(buffer==WERed+NSYellow)
        {
            if(P1==WERed+NSYellow)
                P1=WERed;    
            else
                P1=WERed+NSYellow;
        }
        else
        {
            if(P1==WEYellow+NSRed)
                P1=NSRed;
            else
                P1=WEYellow+NSRed;
        }
    }
}