traffic_maunaldelay

/*Connect the interface over J2 of MCBX51 adapter */
/* This program simutaes the traffic light */


#include<stdio.h>
#include <REG51RD2.H>

void delay(int k);


unsigned char xdata control _at_ 0xe003;
unsigned char xdata porta _at_ 0xe000;
unsigned char xdata portb _at_ 0xe001;
unsigned char xdata portc _at_ 0xe002;
unsigned char code str[31]={0x10,0x81,0x7a,
                            0x44,0x44,0xf0,
                            0x8,0x11,0xe5,
                            0x44,0x44,0xf0,
                            0x81,0x10,0xda,
                            0x44,0x44,0xf0,
                            0x11,0x8,0xb5,
                            0x44,0x44,0xf0,
                            0x88,0x88,0x00,
                            0x44,0x44,0xf0,
                            0x00
};

void traffic_s();
void traffic_n();
void traffic_se();

void reset();

void main()
{
        control = 0x80;
    portb=0x00;
porta=0x0f;
portc=0xf0;



        /*//all predestian red
        portc = 0xd0;
        //west red
        portb = 0x80;

        traffic_n();

        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);

        traffic_s();

        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);
        delay(30000);

        traffic_se();*/
}

void traffic_s()
{
    //south red
    porta = 0x08;
    //north s green
    portc = portc + 0x02;
}

void traffic_n()
{
    reset();
    //north red
    portb = portb + 0x08;
    // south s green
    portc = portc + 0x08;
}

void traffic_se()
{
    reset();
    //south red
    porta = 0x08;
    //east left green
    porta = porta + 0x10;
}

void reset()
{
    //all predestian red
        portc = 0xd0;
        //west red
        portb = 0x80;
}

void delay(int k)
{
  int p;
  for(p=0;p<=k;p++)
  {
   ;
  }
}