Comments on: Interfacing Stepper Motor with PIC Microcontroller

By: Namratha

Namratha — Mon, 17 Jul 2017 06:19:00 +0000

Hi Ligo George …
Please check this code ,
I have interfaced 2 amps (1.8 deg ) Stepper Motor to pic16f877a pic controller. Am unsign L298N Stepper motor driver .

#define A1 RC0 // OUTPUT motor
#define A2 RC1 // OUTPUT
#define B1 RC2 // OUTPUT
#define B2 RC3 // OUTPUT

#define pulse RD0 // INPUT pulse sensor
#define led RD2 // OUTPUT power on
#define DETECT RB3 // OUTPUT MAGNETIC SENSOR

while(1)
{
state = DETECT;
if(pulse && state == 1)
{
led = 1;
for(i=0; i<50; i++)
{
motor_full();
}
}
if(pulse == 0)
{
motor_off();
led = 0;

}
if(state == 0)
{
i++;
motor_full(); // come back to home position
}

}
}

void motor_full()
{

A1 =1; B1= 0; A2 =0; B2= 1;
__delay_ms(1);

A1 =0; B1= 0; A2 =0; B2= 1;
__delay_ms(1);

A1 =0; B1= 0; A2 =1; B2= 1;
__delay_ms(1);

A1 =0; B1= 0; A2 =1; B2= 0;
__delay_ms(1);

A1 =0; B1= 1; A2 =1; B2= 0;
__delay_ms(1);

A1 =0; B1= 1; A2 =0; B2= 0;
__delay_ms(1);

A1 =1; B1= 1; A2 =0; B2=0;
__delay_ms(1);

A1 =1; B1= 0; A2 =0; B2= 0;
__delay_ms(1);

}

void motor_off()
{
PORTCbits.RC0 = 0;
PORTCbits.RC1 = 0;
PORTCbits.RC2 = 0;
PORTCbits.RC3 = 0;
A1 =0; B1= 0; A2 =0; B2= 0;

}

By: Ligo George

Ligo George — Sun, 27 Nov 2016 07:35:00 +0000

In reply to Kannan Devadass. It depends on the minimum stepping angle of your motor. What is minium step ?

By: Kannan Devadass

Kannan Devadass — Thu, 06 Oct 2016 07:08:00 +0000

Hi.. Ligo George
I want to rotate my stepper motor for 1.8 degree. For that what process i should follow. If i run this above program its working well and good but the rotation is about 45 degree for every cycle.

By: Ligo George

Ligo George — Thu, 02 Jun 2016 13:00:00 +0000

In reply to Rakesh.

Sorry, the above article is not about Atmega. Please use our forums ( https://electrosome.com/forums ) for asking doubts outside the scope of above article.

By: Rakesh

Rakesh — Thu, 05 May 2016 06:11:00 +0000

HI…Ligo geroge
. I want to rotate unipolar stepper motor with atmega16a
and i configure it with following code

#include

int main()

{

DDRA = 0xFF; //All pins of PORTB as output

PORTA = 0x00; //Initially all pins as output high

while(1)

{

PORTA = 0x01; //0001

_delay_ms(10);

PORTA = 0x04; //0100

_delay_ms(10);

PORTA = 0x02; //0010

_delay_ms(10);

PORTA = 0x08; //1000

_delay_ms(10);

}

return 0;

}
and common terminal connected to vcc

its not rotating properly

will you suggest me any solution

Thanks in advances

By: Ligo George

Ligo George — Fri, 15 Apr 2016 02:48:00 +0000

In reply to Mark Moinjeh. You can control the speed by adjusting the delay in each step and reading the potentiometer using adc.

By: Ligo George

Ligo George — Fri, 15 Apr 2016 02:33:00 +0000

In reply to asmaa. You can calculate depending on the number of steps on that stepper motor.

By: Ligo George

Ligo George — Fri, 15 Apr 2016 02:14:00 +0000

In reply to Don Xavier. You can use for loop for that.

By: Mark Moinjeh

Mark Moinjeh — Sat, 09 Apr 2016 17:54:00 +0000

I am Mark, I need a code in MikroC to control the speed of my steeper motor using a potentiometer when the switch is on/ high. Thank you

By: Mark Moinjeh

Mark Moinjeh — Sat, 09 Apr 2016 17:54:00 +0000

sorry it is stepper motor