This is ppt on stepper motor vehicle is eligible to the elements of a sudden ah I am in a while back in a

1. Stepper Motor Interfacing with 89C51
Dr.M.Sugadev,M.Tech,Ph.D
Associate Professor
Department of ECE
Sathyabama Institute of Science and Technology
Chennai-600119
1

2. Stepper Motor
2
• Stepper motors are DC motors that move in discrete steps. They have
multiple coils that are organized in groups called "phases". By energizing
each phase in sequence, the motor will rotate, one step at a time.

3. 3
Stepper Motor Excitation- Full Step

4. 1
Stepper Motor Excitation- Half Step

5. Decreasing step size with more coils
1

6. Stepper Motor Interfacing with 89C51
1

7. C-Program for Toggling Leds at Port-2
#include<reg51.h> // include register header files
void delay(int x); //function declaration
void main()
{
1
P2=0x00;//Configure P2 as output port
while(1) // Infinite Loop
{
P2 = 0xFF; // Make Port2 pins High
delay(5000); // Call delay function
P2=0x00; // Make Port2 pins Low
delay(5000); Call delay function
}
}
void delay(x)
{
unsigned int i,j;
for(i=0;i<x;i++);
for(j=0;j<x;j++);
}

8. Controlling individual Port pins
1

9. C-Program for configuring individual Port pins
1
#include<reg51.h>
void delay(int x); //function declaration
sbit LED = P2^0; // assign name port pin
void main()
{
LED =0; // Configure Port 2.0 as output port
while(1)
{
LED=1;
delay(5000); // Call delay function
LED=0;
delay(5000); // Call delay function
}
}
void delay(x)
{
unsigned int i,j;
for(i=0;i<x;i++);
for(j=0;j<x;j++);
}

10. Reading a switch and controlling Leds
1

11. C-Program for reading a switch and controlling
Leds
1
#include<reg51.h>
sbit LED = P2^0;
sbit SW = P2^5;
void main()
{
SW = 1; // Configure Port 2.5 as input port
LED =0; // Configure Port 2.0 as output port
while(1)
{
if (SW==0)
LED=1;
else
LED=0;
}
}