51单片机十字路口交通灯课程设计

原理图

六车道十字路口交通控制原理图，图中有四个不同颜色的箭头，代表四个不同的状态。需要使用51单片机实现交通灯及人行道灯。

开发工具

• Protues7


• Keil4

设计图

设计图分析

使用元件

设计思想

1. 每个路口有三个红绿灯模块，分别代表左转，直行，右转，高电平时亮灯，低电平熄灭


2. 对于的红绿灯模块下的数码管显示倒计时，当对应的红绿灯要变灯时显示倒计时提醒驾驶员注意


3. 单片机引脚直接控制红绿灯和数码管，人行道灯采用逻辑门控制，当面前的路口都是红灯时才为绿灯


4. 全部路口的时间是一样的，到时间就切换到下一个状态

代码

#include
#define uchar unsigned char
#define RR 0x24 //一红一红
#define RG 0x0c //一红一绿
#define GR 0x21 //一绿一红
#define GG 0x09 //一绿一绿
#define LOCK(num) A##num = 1; A##num = 0 //LOCK(8)意为 A8 = 1; A8 = 1; 锁存器一开一关
#define START 127
#define GAP 30
sbit A8 = P1^0;
sbit A9 = P1^1;
sbit A10 = P1^2;
sbit A11 = P1^3;
sbit A12 = P1^4;
sbit A13 = P1^5;
sbit A14 = P1^6;
sbit A15 = P1^7;
uchar mtable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x27,0x7f,0x6f};
char sec = START, cnt = 0;
void delay(unsigned int ms);
void status1();
void status2();
void status3();
void status4();
void inittimer();
void main(){
inittimer(); //打开定时器
while(1){
status1();
status2();
status3();
status4();
}
}
void inittimer() {
TMOD = 0X01;
TL0 = 0xb0;
TH0 = 0x3c;
ET0 = 1; EA = 1;
TR0 = 1;
}
void status1(){
while( START-GAP while( START-GAP+2 <= sec && sec <= START-GAP/2 ){
P0 = mtable[sec-(START-GAP+1)];
P3 = ~(0x31); LOCK(14);
P3 = ~(0x07); LOCK(15);
delay(100);
P3 = 0xff; LOCK(14); LOCK(15);
}
//点灯顺序为西路口开始逆时针选装
P2 = RR; LOCK(8);
P2 = RG; LOCK(9);
P2 = RR; LOCK(10);
P2 = ( sec <= START-GAP+2 ) ? 0x22 : GR; LOCK(11);
P2 = RR; LOCK(12);
P2 = ( sec <= START-GAP+2 ) ? 0x12 : GG; LOCK(13);
}
}
void status2(){
while( START-2*GAP while( START-2*GAP+2 <= sec && sec <= (START-GAP)-GAP/2 ){
P0 = mtable[sec-(START-2*GAP+1)];
P3 = ~(0x08); LOCK(14);
P3 = ~(0x3e); LOCK(15);
delay(100);
P3 = 0xff; LOCK(14); LOCK(15);
}
P2 = GR; LOCK(8);
P2 = ( sec <= START-2*GAP+2 ) ? 0x14 : RG; LOCK(9);
P2 = RR; LOCK(10);
P2 = ( sec <= START-2*GAP+2 ) ? 0x14 : RG; LOCK(11);
P2 = ( sec <= START-2*GAP+2 ) ? 0x22 : GR; LOCK(12);
P2 = RR; LOCK(13);
}
}
void status3(){
while( START-3*GAP while( START-3*GAP+2 <= sec && sec <= (START-2*GAP)-GAP/2 ){
P0 = mtable[sec-(START-3*GAP+1)];
P3 = ~(0x07); LOCK(14);
P3 = ~(0x31); LOCK(15);
delay(100);
P3 = 0xff; LOCK(14); LOCK(15);
}
P2 = ( sec <= START-3*GAP+2 ) ? 0x22 : GR; LOCK(8);
P2 = RR; LOCK(9);
P2 = ( sec <= START-3*GAP+2 ) ? 0x12 : GG; LOCK(10);
P2 = RR; LOCK(11);
P2 = RG; LOCK(12);
P2 = RR; LOCK(13);
}
}
void status4(){
while( START-4*GAP while( START-4*GAP+2 <= sec && sec <= (START-3*GAP)-GAP/2 ){
P0 = mtable[sec-(START-4*GAP+1)];
P3 = ~(0x3e); LOCK(14);
P3 = ~(0x08); LOCK(15);
delay(100);
P3 = 0xff; LOCK(14); LOCK(15);
}
P2 = ( sec <= START-4*GAP+2 ) ? 0x14 : RG; LOCK(8);
P2 = ( sec <= START-4*GAP+2 ) ? 0x22 : GR; LOCK(9);
P2 = RR; LOCK(10);
P2 = GR; LOCK(11);
P2 = ( sec <= START-4*GAP+2 ) ? 0x14 : RG; LOCK(12);
P2 = RR; LOCK(13);
}
}
void delay(unsigned int ms) {
unsigned int i,j;
for(i=0;i for(j=0;j<150;j++);
}
void time_ler() interrupt 1 {
TL0=0xb0; TH0=0x3c;
cnt++;
if( cnt == 20 ){
cnt = 0;
sec--;
if( sec == START-4*GAP ){ //倒计时结束重置sec 回到status1
sec = START;
}
}
}


资源

DSN文件

https://share.weiyun.com/ggUgDg9T