Why this simple PWM doesn't work in xc8

I know there are a lot of examples in internet, but what does need this code to work ?

frecuency oscillator = 4mhz

periode = 0.25us

duty_cicle = 250

Prescale = 16

PR2 = 124

#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
#include <pic16f88.h>

#pragma config FOSC = HS  // Oscillator Selection bits (INTOSC oscillator: I/O function on RA6/OSC2/CLKOUT pin, I/O function on RA7/OSC1/CLKIN)
#pragma config WDTE = OFF       // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable bit (PWRT disabled)
#pragma config MCLRE = OFF      // RA5/MCLR/VPP Pin Function Select bit (RA5/MCLR/VPP pin function is digital input, MCLR internally tied to VDD)
#pragma config BOREN = ON       // Brown-out Detect Enable bit (BOD enabled)
#pragma config LVP = OFF        // Low-Voltage Programming Enable bit (RB4/PGM pin has digital I/O function, HV on MCLR must be used for programming)
#pragma config CPD = OFF        // Data EE Memory Code Protection bit (Data memory code protection off)
#pragma config CP = OFF         // Flash Program Memory Code Protection bit (Code protection off)

void main ()
{
     while (1)
     {
            CCP1CON = 0x2C; /*activate PWM mode*/
            PR2 = 0x7C;    /*124 (DECIMAL)*/
            T2CON = 0X06; /*prescale 16 */
            CCPR1L = 0X3E;

     }    
}

I want to see :

Period of PWM = 2ms

Dutycicle = 1ms

Sincerilly NIN

Solution

First off topic: Don't include pic16f88.h, it's included by xc.h.

Little more off topic: If you use a more modern part (e.g. PIC16f1619), you can use the MPLAB Code Configurator to generate the TMR2 and CCP code for you. It'll also cost less and have more flash/ram. That device is on the curiosity board ($20).

On Topic: Your first stop is the datasheet.

The PWM section has the setup for PWM operation.

Step1: The timer 2 takes Fosc/4 as an input, which is 1mhz in your case. Target frequency is 500Hz. 1e6/500 = 2k. I'd suggest a prescaler of 16, and pr value of 125. This will give you exactly 500Hz.

Step2: We want a 50% duty cycle. CCP1L floor(125/2) = 62. CCP1X:CCP1Y = 0.5 * 4 = 2.

Step 3: Clear the tris bit.

Step4 and 5: Turn it on

// Step 1
TMR2ON = 0;
TOUTPS = 0;
T2CKPS = 2;
PR2 = 250U;

// Step 2
CCP1L = 62U;
CCP1X = 1;
CCP1Y = 0;

// Step 3
TRISB3 = 0;

// Step 4
TMR2ON = 1;

// Step 5
CCP1M = 0xC;

Hope that helps.