单片机交通灯简单程序.docVIP

单片机交通灯简单程序 #includereg51.h #define uchar unsigned char #define uint unsigned int sbit D1=P3^7; sbit D2=P3^3; sbit D3=P3^1; sbit D4=P1^2; sbit D5=P1^1; sbit D6=P1^0; sbit D7=P1^5; sbit D8=P1^4; sbit D9=P1^3; sbit D10=P3^0; sbit D11=P1^7; sbit D12=P1^6; sbit Button_A=P3^6; void delay(unsigned char i); void display(void); void init(); uchar table[ ]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; char Time_EW; //东西方向倒计时 char Time_SN; //南北方向倒计时 uchar EW=14,SN=14,EWJ=4,SNJ=4; //程序初始化赋值 uchar count=0; void main() { init(); while(1) { Time_EW=EW; Time_SN=SN; while(Time_EW=0) { D1=1;D2=1;D3=0; D4=0;D5=1;D6=1; D7=1 ;D8=1;D9=0; D10=0;D11=1;D12=1; display(); } Time_SN=SNJ; Time_EW=EWJ; while(Time_EW=0) { D1=1;D2=0;D3=1; D4=1;D5=0;D6=1; D7=1;D8=0;D9=1; D10=1;D11=0;D12=1; display(); } Time_EW=EW; Time_SN=SN; while(Time_EW=0) { D1=0;D2=1;D3=1; D4=1;D5=1;D6=0; D7=0;D8=1;D9=1; D10=1;D11=1;D12=0; display(); } } } void init() { TR0=1; //启动定时器0 TMOD=0x01; //定时器工作于方式1 TH0=(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 IT0=1; //INT0负跳变触发 } void delay(unsigned char i) //延时i ms { unsigned char j; while(i--) { for(j=0;j115;j++); } } void display(void) { P0=0x08; P2=table[Time_EW%10]; delay(2); P0=0x04; P2=table[Time_EW/10]; delay(2); P0=0x02; P2=table[Time_SN%10]; delay(2); P0=0x01; P2=table[Time_SN/10]; delay(2); } void time_0() interrupt 1 { TH0=0x3c; TL0=0xb0; count++; if(count==20) { Time_SN--; Time_EW--; count=0; } } void int0(void) interrupt 0 { while(Button_A==0) { D1=0; D4=0; D7=0; D10=0; //所有都是红灯 P2=0; //关数码管 } }