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#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
#define ON 0
#define OFF 1
sbit g1=P1^0;
sbit y1=P1^1;
sbit l1=P1^2;
sbit g2=P1^3;
sbit y2=P1^4;
sbit l2=P1^5;
uchar num,num1,key,a,b,c,d;
uint t0,t1; /*t0,t1,要大于255！！*/
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
void init(); //初值函數
void display(uchar a,uchar b,uchar c,uchar d); //顯示程序
void Keyscan(); // 按鍵
void delay (uint z) //延時函數
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void main()//主函數
{
init();
while(1)
{
display(a,b,c,d);
Keyscan();
if(key) //如果有按鍵按下，
{
TR0=0;
TR1=0; //不計時
P0=table[9]; //顯示99
P2=0; //全部顯示
if(key==1) //東西方向
{
P1=0xde; //LED狀態
}
if(key==2) //南北方向
{
P1=0xf3; //LED狀態
}
}
while(key)
{
Keyscan(); //等待按下正常
}
TR0=1;
TR1=1;
}
}
void Keyscan()
{
uchar temp;
temp=P3;
while(temp!=0xff)
{
delay(5); //延時，消抖
temp=P3; //再次確認是否有健按下
temp=temp&0xff;
while(temp!=0xff)
{
temp=P3;
switch(temp)
{
case 0xfe:key=1; //
break;
case 0xfd:key=2;
break;
case 0xfb:key=0;
break;
}
while(temp!=0xff) //松手檢測
{
temp=P3;
temp=temp&0xff;
}
}
}
}
void init() //改初值函數
{
g1=ON;
y1=OFF;
l1=OFF;
g2=OFF;
y2=OFF;
l2=ON;
num=20;
num1=23;
a=num/10;
b=num%10;
c=num1/10;
d=num1%10;
TMOD=0x11;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET0=1;
ET1=1;
TR0=1;
TR1=1;
}
void timer0() interrupt 1 //定時器0中斷控制東西時間
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
t0++;
if(t0%20==0) //每一秒進入一次
{
if(t0<=400) //綠燈時間
{
num--;
if(num==0) //綠燈結束，開黃燈
{
num=3;
g1=OFF;
y1=ON;
l1=OFF;
}
}
if(t0>400&&t0<=460) //黃燈時間
{
num--;
if(num==0) //黃燈結束，開紅燈
{
num=23;
g1=OFF;
y1=OFF;
l1=ON;
}
}
if(t0>460&&t0<=920) //紅燈時間
{
num--;
if(num==0) //紅燈結束，開綠燈
{
num=20;
g1=ON;
y1=OFF;
l1=OFF;
}
if(t0==920)
t0=0;
}
a=num/10;
b=num%10;
}
}
void timer1() interrupt 3 //定時器1中斷控制南北時間
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
t1++;
if(t1%20==0)
{
if(t1<=460)
{
num1--;
if(num1==0)
{
num1=20;
g2=ON;
y2=OFF;
l2=OFF;
}
}
if(t1>460&&t1<=860)
{
num1--;
if(num1==0)
{
num1=3;
g2=OFF;
y2=ON;
l2=OFF;
}
}
if(t1>860&&t1<=920)
{
num1--;
if(num1==0)
{
num1=23;
g2=OFF;
y2=OFF;
l2=ON;
}
if(t1==920)
t1=0;
}
c=num1/10;
d=num1%10;
}
}
/*void display(uchar a,uchar b,uchar c,uchar d) //顯示程序
{
P0=table[a];
P2=1;
delay(1);
P2=255;
P0=table[b];
P2=2;
delay(1);
P2=255;
P0=table[c];
P2=4;
delay(1);
P2=255;
P0=table[d];
P2=8;
delay(1);
P2=255;
}
*/
void display(uchar a,uchar b,uchar c,uchar d) //顯示程序
{
P0=table[a];
P2=0xfe;
delay(1);
P2=0xff;
P0=table[b];
P2=0xfd;
delay(1);
P2=0xff;
P0=table[c];
P2=0xfb;
delay(1);
P2=0xff;
P0=table[d];
P2=0xf7;
delay(1);
P2=0xff;
}

復制代碼

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