PIC控制十字交通灯的设计程序

//-----------------------------------------------------------------

// 名称: LED模拟交通灯

//-----------------------------------------------------------------

// 说明: 东西向绿灯亮若干秒后,黄灯闪烁,闪烁5次后亮红灯,

//红灯亮后,南北向由红灯变为绿灯,2秒后南北向黄灯闪烁,

//闪烁5次后亮红灯,东西向绿灯亮,如此往复.

//本例将切换时间设得较短，以便快速观察运银轿行效果.

//

//-----------------------------------------------------------------

#include <pic.h>

#define INT8U unsigned char

#define _XTAL_FREQ 1000000UL

#define RED_EW_ON() RC0 = 0 //东西向指示灯开

#define YELLOW_EW_ON() RC1 = 0

#define GREEN_EW_ON() RC2 = 0

#define RED_EW_OFF() RC0 = 1 //东西向指示灯关

#define YELLOW_EW_OFF() RC1 = 1

#define GREEN_EW_OFF() RC2 = 1

#define RED_SN_ON() RC3 = 0 //南北向指示灯开

#define YELLOW_SN_ON() RC4 = 0

#define GREEN_SN_ON() RC5 = 0

#define RED_SN_OFF() RC3 = 1 //南北向指示灯关

#define YELLOW_SN_OFF() RC4 = 1

#define GREEN_SN_OFF() RC5 = 1

#define YELLOW_EW_BLINK() RC1 = ~RC1 //东西向黄灯闪烁

#define YELLOW_SN_BLINK() RC4 = ~RC4 //南北向黄灯闪烁

//闪烁次数, *** 作类型变量

INT8U Flash_Count = 0, Operation_Type = 1

//-----------------------------------------------------------------

// 延时函数卜册

//-----------------------------------------------------------------

void DelayX100ms(INT8U n)

{

while (n--) __delay_ms(100)

}

//-----------------------------------------------------------------

// 交通灯型搏宏切换子程序

//-----------------------------------------------------------------

void Traffic_Light()

{int i

switch (1 )

{

case 1: //东西向绿灯与南北向红灯亮

RC2 = 0

GREEN_SN_OFF()

RED_SN_ON()

RED_EW_OFF()

DelayX100ms(20)

case 2: //东西向黄灯开始闪烁,绿灯关闭

YELLOW_EW_OFF()

GREEN_EW_OFF()

for(i=0i<5i++)

{

YELLOW_EW_BLINK()

DelayX100ms(10)

}

YELLOW_EW_OFF()

case 3: //东西向红灯与南北向绿灯亮

RED_EW_ON()

RED_SN_OFF()

GREEN_SN_ON()

DelayX100ms(20)

case 4: //南北向黄灯开始闪烁

GREEN_SN_OFF()

YELLOW_SN_OFF()

for(i=0i<5i++)

{

YELLOW_SN_BLINK()

DelayX100ms(10)

}

YELLOW_SN_OFF()

}

}

//-----------------------------------------------------------------

// 主程序

//-----------------------------------------------------------------

void main()

{TRISC=0

YELLOW_EW_OFF()

YELLOW_SN_OFF()

RED_EW_OFF()

GREEN_EW_OFF()

YELLOW_SN_OFF()

GREEN_SN_OFF()

while(1)

//Traffic_Light()

}

#include "pic.h"

unsigned char dispbitcnt //数码管位码扫描变量

unsigned char second //秒变量

unsigned char minite //分团歼告变量

unsigned char hour //时变量

unsigned char tcnt //秒信号产生变量

unsigned char mstcnt //扫描时间变量

const unsigned char dispcode[10]={0xc0,0xf9,0xa4,0xb0,0x99,

0x92,0x82,0xf8,0x80,0x90}

//0123456789段码

const unsigned char dispbitcode[6]={0xfe,0xfd,0xfb,0xf7,

0xef,0xdf}

//123456位码

unsigned char dispbuf[6]={0,0,0,0,0,0}

//缓冲数组

//**************TMR0中断数码管扫描程序塌明*********************

void interrupt tmr0(void)

{

if(T0IE &&T0IF)

{

T0IF=0 //清除中断标志位

{

PORTC=dispcode[dispbuf[dispbitcnt]]

PORTA=dispbitcode[dispbitcnt]

dispbitcnt++

if(dispbitcnt==6)

{dispbitcnt=0

}

}

tcnt++ //中断产生秒信号

if(tcnt==244)

{tcnt=0

second++

if(second==60)

{second=0

minite++

if(minite==60)

{minite=0

hour++

if(hour==24)

{hour=0

}

}

}

dispbuf[4]=second%10

dispbuf[5]=second/10

dispbuf[2]=minite%10

dispbuf[3]=minite/10

dispbuf[0]=hour%10

dispbuf[1]=hour/10

}

}

}

///****************1ms延改衡时程序******************

void delay_1ms(unsigned int i)

{

unsigned char j

for(i!=0i--)

for(j=141j!=0j--)

}

///****************按键检测*********************

void key_scan(void)

{

while(1)

{

if(RB0==0)

{

delay_1ms(20)

if(RB0==0)

{second++

if(second==60)

{second=0

}

dispbuf[4]=second%10

dispbuf[5]=second/10

while(RB0==0)

}

}

if(RB1==0)

{

delay_1ms(20)

if(RB1==0)

{

minite++

if(minite==60)

{minite=0

}

dispbuf[2]=minite%10

dispbuf[3]=minite/10

while(RB1==0)

}

}

if(RB2==0)

{

delay_1ms(20)

if(RB2==0)

{

hour++

if(hour==24)

{

hour=0

}

}

dispbuf[0]=hour%10

dispbuf[1]=hour/10

while(RB2==0)

}

}

}

//***************端口初始化***********************

void PORT_INIT(void)

{

TRISA=0 //A口输出

ADCON1=0x06//数字I/O

TRISC=0 //C口输出

TRISB=0XFF //B口输入

}

//***************TMR0初始**************************

void TMR0_INIT(void)

{

GIE=1 //开启全局中断

OPTION=0X03//开启内部上拉，预分频比1/16

T0IF=0 //清中断标志

T0IE=1 //允许TMR0中断

}

//*************主程序********************

void main(void)

{

while(1)

{

dispbitcnt=0

PORT_INIT()

PORTC=0x00 //开段码

PORTA=0x00 //开位码

delay_1ms(200) //延时

delay_1ms(200) //延时

delay_1ms(200) //延时

delay_1ms(200) //延时

PORTA=0xff //关位码

TMR0_INIT()//调初始子程序

TMR0=0 //开启TMR0中断

key_scan() //按键检测子程序

}

}

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