capture PWM

[ilia]

capture code for pwm not working please help

#pragma config FOSC = INTIO67, FCMEN = OFF, IESO = OFF                       // CONFIG1H

#pragma config WDTEN = OFF, WDTPS = 2048                                     // CONFIG2H

#pragma config STVREN = ON, LVP = OFF, XINST = OFF                          // CONFIG4L

#pragma config CP0 = OFF, CP1 = OFF, CP2 = OFF, CP3 = OFF                   // CONFIG5L

#pragma config CPB = OFF, CPD = OFF                                         // CONFIG5H

#pragma config WRT0 = OFF, WRT1 = OFF, WRT2 = OFF, WRT3 = OFF               // CONFIG6L

#pragma config WRTB = OFF, WRTC = OFF, WRTD = OFF                           // CONFIG6H

#pragma config EBTR0 = OFF, EBTR1 = OFF, EBTR2 = OFF, EBTR3 = OFF           // CONFIG7L

#pragma config EBTRB = OFF , PBADEN = OFF ,MCLRE = EXTMCLR , CCP2MX = PORTC1

#pragma config P2BMX  = PORTD2 

#include <p18f46k22.h>

#include <stdlib.h>

#include <stdio.h>

// *************** Initialize Capture mode for PWM input ************************* 

 void main (void)

{

long uPWM_Low;

long uPWM_Hi;

long bRisingEdge;

long uPWM;

ANSELB=0b0;

ANSELC=0b0;

TRISC=0b00000010;

TRISB=0b11110000;

//trigger on rising edge 

uPWM=0;

bRisingEdge=1;

PORTBbits.RB1=0b0;

PORTBbits.RB3=0b0;

PORTBbits.RB0=0b0;

PORTBbits.RB2=0b0;

T1CON= 0b00000111;

CCP1CON=0b0000101; 

CCPTMRS0bits.C1TSEL0 = 0; 

CCPTMRS0bits.C1TSEL1 = 0; 

while(1)

{

if (PIR1bits.CCP1IF==0b1) 

  { 

   // get PWM capture reading 

   uPWM_Low = CCPR1L; 

   uPWM_Hi = CCPR1H;

   uPWM = CCPR1H*256UL|CCPR1L; 

   if (bRisingEdge==1) 

   { 

    // Set trigger on falling edge 

    CCP1CON = 0b00000100; 

    bRisingEdge = 0;

    PIR1bits.CCP1IF=0b0; 

   } 

   else 

   { 

    // Set trigger on rising edge 

    CCP1CON = 0b00000101; 

    bRisingEdge = 1;

    PIR1bits.CCP1IF=0b0; 

   }    

if (uPWM_Hi>0)

{

PORTBbits.RB3=0b1;

PORTBbits.RB2=0b1;

PORTBbits.RB1=0b1;

PORTBbits.RB0=0b1;

}

}

}

}

[AJISH ALFRED]

Please explain what is going wrong as you observed.

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