Noorahmed

1. Program to toggle the LED
#include<reg51.h>
Void delay (void);
Unsigned int i;
Void main()
{
While(1)
{
P2=0x30;
delay();
P2=0x00;
delay();
}
}
void delay(void)
{
for(i=0;i<25000;i++);
}

2. Program to control direction and speed of a
stepper motor.
#include<reg51.h>
Static bit Dir=0;
//sbit buzzer = P0^5;
Void ChangeDir(void) interrupt 0
{
Dir = ~Dir;
}
Void delay(unsigned int x)
{
for(;x>0;x--);
}
Main{}
{
Unsigned char Val,i;
EA=0x1;
EX0=0x1;
ES=1;
While(1)
{
If(Dir)
{
Val = 0x08;
For(i=0;i<4;i++)
{
P0 = Val;
Val = Val>>1;
Delay(575);
}
}
Else
{

3. Val = 0x01;
For(i=0;i<4;i++)
{
P0 = Val;
Val = Val<<1;
Delay(575);
}
}
}
}

4. Program to generate square wave
#include<reg51.h>
Void delay(void);
Void main{}
{
While(1)
{
P0=0x00;
Delay();
P0=0xff;
Delay();
}
}
Void delay(void)
{
int i;
For(i=0;i<=300;i++);
}

5. Program to control traffic lights
#include<reg51.h>
Void delay(void);
Unsigned int i;
Void main{}
{
While(1)
{
P0=0x58;
P1=0x09;
Delay();
Delay();
Delay();
P0=0x05;
P1=0x0f;
Delay();
Delay();
Delay();
P0=0x54;
P1=0x06;
Delay();
Delay();
P0=0xd0;
P1=0x07;
Delay();
Delay();
Delay();
P0=0x92;
P1=0x05;
Delay();
Delay();
P0=0xf0;
P1=0x05;
Delay();
Delay();
P0=0x61;
P1=0x05;
Delay();
Delay();
P0=0x70;
P1=0x0d;

6. Delay();
Delay();
}
}
Void delay(void)
{
For(i=0;i<35000;i++);
For(i=0;i<35000;i++);
}

7. Program to generate Rectangular wave
#include<reg51.h>
Void msdelay(unsigned int);
Void main{}
{
P0=00;
While(1)
{
Msdelay(50);
P0=0xff;
Msdelay(100);
P0=0x00;
}
}
Void msdelay(unsigned int value)
{
Unsigned int y;
For(y=0;y<value;y++);
}

8. Program to generate Triangular wave
#include<reg51.h>
idata unsigned char count;
Void main()
{
While(1)
{
For(count=0;count!=0xff;count++)
{
P0=count;
}
For(count=0xff;count>0;count--)
{
P0=count;
}
}
}