HI,

I am working on capture mode for measuring pulse at pic input pin...
here is code pls have a look is that fine after that i will watch on lcd..

#include<pic.h>
#define _XTAL_FREQ 20000000L
__CONFIG(0x3F18);
 unsigned char low,high;
void main (void){

TRISC2=1;
CCP1CON=0b00000101;//Capture mode, every rising edge
T1CON=0b00001001;//Internal clock,Enables Timer1
TMR1IF =0;
 TMR1H  = 0x00; 
 TMR1L = 0x00;
GIE =1;  // Interrupt Enable 
  PEIE =1;
CCP1IE =1;
while(1){}

}



static void interrupt isr(void) {
 
  if ( CCP1IF ) {
    low=CCPR1L;
high=CCPR1H;
    CCP1IF = 0;
  }

  // if timer interrupt: reset timer and toggle Port B.2
  if ( TMR1IF ) {
    
    TMR1H = 0x00;  TMR1L = 0x00;
    TMR1IF = 0;
  }
}

 

...I looked. Now what?

 

Is that fine?

 

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...I looked. Now what?

I want to make controller which will capture the timing of pulse..

 

Here is a simple and reliable way;

// capturing a timed pulse period using TMR1
main()
{
  // reset timer
  T1CON = 0;        // timer1 OFF
  TMR1H = 0;        
  TMR1L = 0;
  
  while(PORTB.F0 == 1) continue;     // wait for \ edge
  while(PORTB.F0 == 0) continue;     // wait for / edge  
  T1CON = 0b00001001;                // start timing
  
  while(PORTB.F0 == 1) continue;     // wait for \ edge
  while(PORTB.F0 == 0) continue;     // wait for / edge  
  T1CON = 0;                         // stop timing
  
  // the period from / to / is now in TMRH and TMR1L.
}

 

What is this F0??

while(PORTB.F0 == 1) continue;

 

What is this F0??

It is the same as RB0

 

) continue;

is this in hi tech compiler ?

 

Just use the same way you normally read a single port pin in your compiler.