Stepper Motor interfacing with Microcontrollers: Programming Stepper motor

►Programming Full step Sequence

►C Programming
I am assuming that stepper motor is connected at Port 1.0 to Port 1.3. Adjusting the delay will increase or decrease the speed of the motor. Here just for demonstration i have taken some delay, you can change it as you want.

[Tip: Do testing.. ]



CODE:
#include .
#define stepper P1
void delay();

void main(){
while(1){
stepper = 0x0C;
delay();
stepper = 0x06;
delay();
stepper = 0x03;
delay();
stepper = 0x09;
delay();
}
}

void delay(){
unsigned char i,j,k;
for(i=0;i<6;i++)
for(j=0;j<255;j++)
for(k=0;k<255;k++);
}



►Assembly Programming
CODE:
org 0H

stepper equ P1

main:
mov stepper, #0CH
acall delay
mov stepper, #06H
acall delay
mov stepper, #03H
acall delay
mov stepper, #09H
acall delay
sjmp main

delay:
mov r7,#4
wait2:
mov r6,#0FFH
wait1:
mov r5,#0FFH
wait:
djnz r5,wait
djnz r6,wait1
djnz r7,wait2
ret
end


►Programming Half step Sequence

►C Programming
Just the main routine changes rest everything remains same, i mean same delay routine.

CODE:
void main(){
while(1){
stepper = 0x08;
delay();
stepper = 0x0C;
delay();
stepper = 0x04;
delay();
stepper = 0x06;
delay();
stepper = 0x02;
delay();
stepper = 0x03;
delay();
stepper = 0x01;
delay();
stepper = 0x09;
delay();
}
}



►Assembly Programming
Here also the main routine changes rest everything remains same.

CODE:
main:
mov stepper, #08H
acall delay
mov stepper, #0CH
acall delay
mov stepper, #04H
acall delay
mov stepper, #06H
acall delay
mov stepper, #02H
acall delay
mov stepper, #03H
acall delay
mov stepper, #01H
acall delay
mov stepper, #09H
acall delay
sjmp main