Cytron Technical Forum

I am trying to control the servo motor with PIC 16F877A and mplabX.Below is my coding for servo motor turn 90 degree,and reversed 90 degree. Unfortunately, i can not move the servo motor. Can i know which pin and register are related to control the servo motor. I am glad to see somebody reply.Thanx:)





#include "delay.h"
#include<htc.h>
#include"adc.h"
#define _XTAL_FREQ 8000000

__CONFIG( HS & // External Crystal at High Speed
WDTDIS & // Disable Watchdog Timer.
PWRTEN & // Enable Power Up Timer.
BORDIS & // Disable Brown Out Reset.
//MCLREN & // MCLR function is enabled
LVPDIS);
void main(void)
{
//int x = 125;
PORTA=0;
PORTC=0;
TRISA=0;
TRISC = 0b11111111 ; // configure RC3 as input (1 for input and 0 for output)
PR2 = 0xFA; //oxFA for 250 (used to set time period)
CCPR2L = 125; // (used to set duty cycle)
CCP2CON = 0b00001100; // select for PWM mode
T2CON = 0b00000110; // enabling timer 2, prescalar 16
adc_initialize();


while(1)
{
RA1=1;

if(RC3==1) // forward
{
// x=x+1

CCPR2L = 250+125; // (used to set duty cycle)
T2CON = 0b00000110; // enabling timer 2, prescalar 16
RC1=1;
}
if(RC4==1) // back ward
{
// x=x-1

CCPR2L = 250-245; // (used to set duty cycle)
T2CON = 0b00000110; // enabling timer 2, prescalar 16
}
DelayMs(2);
}

}

It seem your PORTC is being configured as input, it cannot output signal if it is input.

Hey man, thanks for ur help.Finally my servo are moving.XD Thank you for take time to reply me:)