COUNT is not counting again

[Bruce]

This code;

 @ device  pic16F690, intrc_osc_noclkout, wdt_off, mclr_off, protect_off 
  K CON 15     ' Calibration factor for flow meter = # pulses per gal
  
' Setup Timer0 as an 8-bit counter with the clock input on RA2.
' 1:1 TMR0 prescaler
' TMR0 counts on high-to-low transitions
  OPTION_REG = %00111000
  
' A/D & Comparators disabled
  ANSEL=0           ' all digital
  ANSELH=0          ' analog module disabled
  CM1CON0=0
  CM2CON0=0
  
' Port setup
  PORTC = 0         ' LEDs off, PULSOUT RC3 provides a high-going pulse
  PORTA = 0
  TRISC = %11110000 ' lower 4 pins outputs
  TRISA = %11111111 ' RA2 = TMR0 clock input for simulated meter pulse inputs
  TMR0 = 0          ' clear TMR0 count       
  
Main:
  IF TMR0 < K  THEN
                    ' Keep the valve open...do nothing..let water flow
  ELSE
    PULSOUT PORTC.3,1000  ' Generate required 10 msec pulse to RC3
    WRITE 7, TMR0   ' write count if you need to?
    TMR0 = 0        ' clear TMR0 count
    HIGH PORTC.0    ' LED toggle stuff
    PAUSE 500
    LOW PORTC.0 
  ENDIF
  GOTO Main
  
  END

With the schematic attached - works. It writes 15 to EEPROM after precisely
15 press/release actions on the switch.

Tested on the PICkit 2 low pin count demo board.

The cap on RA3 is 0.01uF, which helps eliminate contact bounce from the switch.

The switch on the PICkit 2 demo board connects to RA3, so a wire runs directly from
RA3 to RA2. Remove the cap, and switch bounce causes problems. It's a really simple
fix.

If your circuit is powered from 5V, and you measure 5V between the PIC VDD/VSS pins,
and you only see 3.2V on RA2 with a pull-up to VDD, then check your circuit. There's a
problem somewhere with your wiring or connections.