Proteus Simulation of Simple Traffic Light System Based on SCM

0. Foreword

[1], function

For the traffic light control system at the intersection, four groups of lights (red, yellow, and green) correspond to the four directions of the intersection, and the remaining time is displayed with a two-digit digital tube.

【2】Tools used

keil-4、proteus-8

1. Code

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit EW_LED2=P2^3;
sbit EW_LED1=P2^2;
sbit SN_LED2=P2^1;
sbit SN_LED1=P2^0;
sbit SN_Yellow=P1^6;
sbit SN_Red=P1^7;
sbit EW_Yellow=P1^2;
sbit EW_Red=P1^3;
bit Flag_SN_Yellow;
bit	Flag_EW_Yellow;
char Time_EW;
char Time_SN;
uchar EW=10,SN=10,EWL=3,SNL=3;
uchar EW1=10,SN1=10,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};
void delay_ms(unsigned int x)
{
    
    
	unsigned int i,j;
	for(i=x;i>0;i--)
	for(j=110;j>0;j--);
}
void Display(void)
{
    
    
	char h,l;
	h=Time_EW/10;
	l=Time_EW%10;
	P0=table[l];
	EW_LED2=1;
	delay_ms(1);
	EW_LED2=0;
	P0=table[h];
	EW_LED1=1;
	delay_ms(1);
	EW_LED1=0;
	h=Time_SN/10;
	l=Time_SN%10;
	P0=table[l];
	SN_LED2=1;
	delay_ms(1);
	SN_LED2=0;
	P0=table[h];
	SN_LED1=1;
	delay_ms(1);
	SN_LED1=0;
}
void timer0(void)interrupt 1 using 1
{
    
    
	static uchar count;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	count++;
	if(count==10)
	{
    
    
		if(Flag_SN_Yellow==1)
		{
    
    SN_Yellow=~SN_Yellow;}
		if(Flag_EW_Yellow==1)
		{
    
    EW_Yellow=~EW_Yellow;}
	}
	if(count==20)
	{
    
    
		Time_EW--;
		Time_SN--;
		if(Flag_SN_Yellow==1)
		{
    
    SN_Yellow=~SN_Yellow;}
		if(Flag_EW_Yellow==1)
		{
    
    EW_Yellow=~EW_Yellow;}
		count=0;
	}
}
void main(void)
{
    
    
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;
	Time_EW=3;
	Time_SN=3;
	while(Time_SN>=0||Time_EW>=0)
	{
    
    
		Flag_EW_Yellow=0;
		P1=s[8];
		Display();
	}
	while(1)
	{
    
    
		Time_EW=EW;
		Time_SN=SN;
		while(Time_SN>=4)
		{
    
    
			Flag_EW_Yellow=0;
			P1=s[0];
			Display();
		}
		P1=0x00;
		while(Time_SN>=0)
		{
    
    
			Flag_SN_Yellow=1;
			EW_Red=1;
			Display();
		}
		EW=EW1;
		SN=SN1;
		EWL=EWL1;
		SNL=SNL1;
		Time_EW=SN;
		Time_SN=EW;
		while(Time_EW>=4)
		{
    
    
			Flag_SN_Yellow=0;
			P1=s[4];
			Display();
		}
		P1=0x00;
		while(Time_EW>=0)
		{
    
    
			Flag_EW_Yellow=1;
			SN_Red=1;
			Display();
		}
		EW=EW1;
		SN=SN1;
		EWL=EWL1;
		SNL=SNL1;
	}
}

2. Schematic diagram

3. Process

[1] According to the code, use keil4 to compile and generate. hex file
[2] Select components on proteus8, and connect each component according to the schematic diagram.
[3] will be generated. hex file loaded into the microcontroller.
【4】Now you can click the triangle symbol in the lower left corner to run.