基于51单片机的十字路口交通灯控制系统

#define uchar unsigned char #define uint unsigned int #include <reg52.h> sbit led2_EW = P2^3; sbit led1_EW = P2^2; sbit led2_SN = P2^1; sbit led1_SN = P2^0; sbit yellow_SN = P1^6; //南北黄灯 sbit red_SN = P1^7; //南北红灯 sbit yellow_EW = P1^2; //东西黄灯 sbit red_EW = P1^3; //东西红灯 bit yellow_SN_Flag; //南北黄灯标志位 bit yellow_EW_Flag; //东西黄灯标志位 char time_EW; //东西方向倒计时单元 char time_SN; //南北方向倒计时单元 uchar EW = 30,SN = 30,EWL = 3,SNL = 3; uchar EW1 = 30,SN1 = 30,EWL1 = 3,SNL1 = 3; uchar code table[10] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; uchar code S[9]={0X28,0X48,0X18,0X48,0X82,0X84,0X81,0X84,0x88}; //延时函数 void delay_ms(unsigned int x) //延时ms { unsigned int i,j; for(i = x;i > 0;i--) for(j = 110;j > 0;j--); } //数码管显示 void Display(void) { char h,l; h = time_EW/10; l = time_EW%10; P0 = table[l]; led2_EW = 1; delay_ms(1); led2_EW = 0; P0 = table[h]; led1_EW = 1; delay_ms(1); led1_EW = 0; h = time_SN/10; l = time_SN%10; P0 = table[l]; led2_SN = 1; delay_ms(1); led2_SN = 0; P0 = table[h]; led1_SN = 1; delay_ms(1); led1_SN = 0; } //中断 void timer0(void)interrupt 1 using 1 { static uchar count; TH0 = (65536-50000) / 256; TL0 = (65536-50000) % 256; count++; if(count == 10) { if(yellow_SN_Flag == 1) //测试南北黄灯标志位 {yellow_SN =~yellow_SN;} if(yellow_EW_Flag == 1) //测试东西黄灯标志位 {yellow_EW =~yellow_EW;} } if(count == 20) { time_EW--; time_SN--; if(yellow_SN_Flag == 1) //测试南北黄灯标志位 {yellow_SN =~yellow_SN;} if(yellow_EW_Flag == 1) //测试东西黄灯标志位 {yellow_EW =~yellow_EW;} count = 0; } } void main(void) { 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 TR0 = 1; //启动定时 time_EW = 3; time_SN = 3; while(time_SN >= 0 || time_EW >= 0) { yellow_EW_Flag = 0; //东西关黄灯显示信号 P1 = S[8]; //所有路口红灯 Display(); } while(1) { time_EW = EW; time_SN = SN; while(time_SN >= 4) { yellow_EW_Flag = 0; P1 = S[0]; //南北通行，东西红灯 Display(); } P1 = 0x00; while(time_SN >= 0) { yellow_SN_Flag = 1; //南北开黄灯信号位 red_EW = 1; //南北黄灯亮,等待左转信号，东西红灯 Display(); } EW = EW1; SN = SN1; EWL = EWL1; SNL = SNL1; time_EW = SN; time_SN = EW; while(time_EW >= 4) { yellow_SN_Flag = 0; //南北关黄灯显示信号 P1 = S[4]; //东西通行，南北红灯 Display(); } P1 = 0X00; while(time_EW >= 0) { yellow_EW_Flag = 1; //东西开黄灯信号位 red_SN = 1; //东西黄灯亮，等待左拐信号，南北红灯 Display(); } EW = EW1; SN = SN1; EWL = EWL1; SNL = SNL1; } }