Andy,

Thank you for the help. I am a beginner as you can tell. You were absolutely
right about the holes in my program. I slapped myself. I tried your suggested
code modification and was still not able to make it work. I must be
overlooking something. I wasn't really sure of what to do with the " goto
cleanup". I have checked my hardware and its ok. The program you suggested
just returned the 250 overflow value. My original program counted and
displayed via leds, but the overflow didn't work. If you have time could you
take another look.

Nichole

Your code suggestions:

    MOVLW   250         ;Start at 250 (we'll be counting down).
        MOVWF   PULSE1S     ;

    CAP_C:

        BSF     PORTA,0     ;Charge the cap.
        NOP                 ;

        MOVLW   11111111B   ;Stop charging and prepare to time the
        TRIS    PORTA       ;discharge.

    MEAS1:

        CLRWDT              ;Reset the watchdog timer.

        BTFSS   PORTA,0     ;If the cap has discharged, jump to
        GOTO    CLEANUP     ;CLEANUP.

        DECFSZ  PULSE1S     ;Otherwise, decrement PULSE1S.
        GOTO    MEAS1       ;If PULSE1S has not yet reached 0,
                            ;loop back.

    ; At this point, we've either looped 250 times, or the cap
    ; has discharged.  Either way, PULSE1S = 250 - [number of loops].

        MOVF    PULSE1S,W   ;PULSE1S = 250 - PULSE1S.
        SUBLW   250         ;
        MOVWF   PULSE1S     ;

        RETURN              ;Return with PULSE1S = number of loops,
                            ;limited to a maximum of 250.