; Let me give it a shot
; 2000 usec - 200 usec = 1800 usec
; 1800 usec/256 = 7 used

        bsf     Aport,0                 ;start the PWM output
        movlw   65                      ;set up delay for minimum width
        movwf   Loop_Counter
Loop1
        decfsz  Loop_Counter
        goto    Loop1
Loop2
        movf    Pulse_Width,w           ;Get the desired pulse width
        subwf   Loop_Counter            ;Compare to the current loop count
        skpnc                           ;if current count is >= desired count
        bcf     Aport,0                 ;then terminate the pulse
        incfsz  Loop_Counter            ;count up the loop until it rolls over
        goto    Loop                    ;back around to beginning of loop

______________________________ Reply Separator _________________________________
Subject: Timing Pulses
Author:  esukq@CSV.WARWICK.AC.UK at internet
Date:    11/5/96 3:00 PM


Hi, i need some help, i am trying to time a PWM signal whose
length varies from 0.2-2mili seconds, i am using a loop at
the moment that increments a counter until the pulse drops
back to 0.  The problem is that it does not seem to work
very well.  I need to get about 8 bits resolution.

I will email the code if that helps.

Thanks in advance.

PS I am using a PIC16C84 running with a 4MHz crystal.
--

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|       Martin Bowman - University of Warwick, Coventry, UK         |
|                     - 3rd Year Electronic Engineering             |
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