Controlling Servo Motor

controlling Servo Motor

hello again my friends 

today's topic is about controlling a servo moteur using a microprocessor.

as we all know the  microcontroller  PIC,  that's why we gonna make a code that show us how we can control a servo using  PIC

for that every one who wanna try it must have Proteus and mikroc pro for PIC (download link in the end of  article)

first what's a servo ? and how it works ?


A servomotor is a rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity and acceleration. It consists of a suitable motor coupled to a sensor for position feedback. It also requires a relatively sophisticated controller, often a dedicated module designed specifically for use with servomotors.


Servomotors are not a specific class of motor although the term servomotor is often used to refer to a motor suitable for use in a closed-loop controlsystem.


Servomotors are used in applications such as robotics, CNC machinery or automated manufacturing.(wikipedia)

code

void servoRotate0() //0 Degree

{

  unsigned int i;

  for(i=0;i<50;i++)

  {

    PORTB.F0 = 1;

    Delay_us(800);

    PORTB.F0 = 0;

    Delay_us(19200);

  }

}

void servoRotate90() //90 Degree

{

  unsigned int i;

  for(i=0;i<50;i++)

  {

    PORTB.F0 = 1;

    Delay_us(1500);

    PORTB.F0 = 0;

    Delay_us(18500);

  }

}

void servoRotate180() //180 Degree

{

  unsigned int i;

  for(i=0;i<50;i++)

  {

    PORTB.F0 = 1;

    Delay_us(2200);

    PORTB.F0 = 0;

    Delay_us(17800);

  }

}

void main()

{

  TRISB = 0; // PORTB as Ouput Port

  do

  {

    servoRotate90(); //90 Degree

    Delay_ms(2000);

    servoRotate0(); //0 Degree

    delay_ms(2000);

    servoRotate180(); //180 Degree

    Delay_ms(2000);

    servoRotate0(); //0 Degree

    delay_ms(2000);

  }while(1);

}

simulation