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51单片机——交通指示灯控制器设计

news 来源：原创 2025/5/15 6:09:50

设计目标

1、设计一交通灯控制，控制东西方向的红、黄、绿灯和南北方向的红、黄、绿灯。
2、可手动控制和自动控制，设置两个输入控制开关。
手动/自动开关，通过P11的按键输入控制
3、手动：设置开关P11，两种情况：红灯管制（各方向）红灯，和各个方向都是黄灯闪烁（周期2S）
4、自动:东西绿灯亮5S,南北红灯亮5S;东西黄灯亮3S,南北红灯亮3S;东西红灯亮5S,南北绿灯亮5S;东西红灯亮3S,南北黄灯亮3S:然后重复刚才过程,不断循环。

硬件设计

东西向：红灯：P2_0 绿灯：P2_1 黄灯：P2_2

南北向：红灯：P2_5 绿灯：P2_6 黄灯：P2_7

按键: P1_0 P1_1

代码实现

软件延时

void Delay20ms(void)	//@11.0592MHz，用于按键消抖
{unsigned char data i, j;i = 216;j = 37;do{while (--j);} while (--i);
}

按键部分

void key_read()
{if(P1_0 == 0){Delay20ms();if(P1_0 == 0){mode++;time = 0;sec = 0;}while(!P1_0);}if(P1_1 == 0){Delay20ms();if(P1_1 == 0){flag++;time = 0;sec = 0;}while(!P1_1);}
}

定时器计时部分


void Timer0_Init(void)		//定时器初始化，10ms
{TMOD &= 0xF0;			//设置定时器模式TMOD |= 0x01;			//设置定时器模式TL0 = 0xF0;				//设置定时初始值TH0 = 0xD8;				//设置定时初始值TF0 = 0;				//清除TF0标志TR0 = 1;				//定时器0开始计时ET0 = 1;				//使能定时器0中断EA = 1;					//使能总中断
}void Timer0_Isr(void) interrupt 1
{TL0 = 0xF0;				//设置定时初始值TH0 = 0xD8;				//设置定时初始值
}

总代码

#include <REGX52.H>
#include "intrins.h"/宏定义/
sbit WE_RED = P2^0;//WE相关的为东西向
sbit WE_GREEN = P2^1;
sbit WE_YELLOW = P2^1;
sbit NS_RED = P2^5;//NS相关的为南北向
sbit NS_GREEN = P2^6;
sbit NS_YELLOW = P2^7;/变量定义区/
unsigned char temp = 0;
unsigned char mode = 0;//手动/自动模式切换标志位
unsigned char flag = 0;//手动模式中两个模式切换标志位
unsigned int time,sec;//函数声明区//
void Timer0_Init(void);
void Delay20ms(void);
void key_read();void main()
{Timer0_Init();while(1){	key_read();if(mode == 1){if(flag == 0){WE_RED = 0;NS_RED = 0;WE_GREEN = 1;WE_YELLOW = 1;NS_GREEN = 1;NS_YELLOW = 1;}}if(mode == 2)mode = 0;if(flag == 2)flag = 0;}
}void Timer0_Init(void)		//10毫秒@12.000MHz
{TMOD &= 0xF0;			//设置定时器模式TMOD |= 0x01;			//设置定时器模式TL0 = 0xF0;				//设置定时初始值TH0 = 0xD8;				//设置定时初始值TF0 = 0;				//清除TF0标志TR0 = 1;				//定时器0开始计时ET0 = 1;				//使能定时器0中断EA = 1;
}void Timer0_Isr(void) interrupt 1
{TL0 = 0xF0;				//设置定时初始值TH0 = 0xD8;				//设置定时初始值time++;if(time == 100){sec++;time = 0;}if(mode == 0){if(sec<=5&&sec>0){WE_RED = 0;NS_RED = 1;WE_GREEN = 1;WE_YELLOW = 1;NS_GREEN = 1;NS_YELLOW = 1;}if(sec <= 10 && sec >5){WE_RED = 1;NS_RED = 0;			}if(sec <= 13 && sec > 10){NS_RED = 1;WE_YELLOW = 0;			}if(sec <= 16 && sec > 13){WE_YELLOW = 1;NS_RED = 0;}if(sec <= 21 && sec > 16){NS_RED = 1;WE_RED = 0;}if(sec <= 26 && sec > 21){WE_RED = 1;NS_RED = 0;}if(sec <= 29 && sec > 26){NS_RED = 1;WE_RED = 0;}if(sec <= 32 && sec > 29){WE_RED = 1;NS_YELLOW = 0;}if(sec > 32){NS_YELLOW = 1;sec = 0;}}if(mode == 1&&flag == 1){if(sec<=2){NS_YELLOW = 0;WE_YELLOW = 0;NS_GREEN = 1;WE_GREEN = 1;WE_RED = 1;NS_RED = 1;}if(sec>2 && sec <= 4){NS_YELLOW = 1;WE_YELLOW = 1;}if(sec>4)sec = 0;}
}void key_read()
{if(P1_0 == 0){Delay20ms();if(P1_0 == 0){mode++;time = 0;sec = 0;}while(!P1_0);}if(P1_1 == 0){Delay20ms();if(P1_1 == 0){flag++;time = 0;sec = 0;}while(!P1_1);}
}void Delay20ms(void)	//@11.0592MHz
{unsigned char data i, j;i = 216;j = 37;do{while (--j);} while (--i);
}