yes ... I am selecting the correct functions. However it seems to be
suffering for noise or something and acts irradically  How do I prevent this
noise/random behaviour ?

On Fri, Apr 30, 2010 at 7:05 PM, ivp <joecolquitt@clear.net.nz> wrote:

> > Also do I need to put resistors or something between the input pin
> > and the switch to prevent interference ?
>
> Not sure what you mean by interference. For a simple "switch is
> closed, LED is on" test, a pull-down resistor on the pin would be
> enough. Noise from the switch operation, "contact bounce", can be
> handled in software, with the optional assistance of a resistor-capacitor
> filter
>
> > since I cant seem to get any clear input readings ...
>
> What are you reading ? With the components described above, you
> should measure 0V on the pin when the switch is open, Vcc when it's
> closed
>
> > for some reason when I program it to light up the leds when the
> > switch is hit they are always lit
>
> Are you selecting the correct banks to set the pin functions ?
>
> For example
>
> banksel trisa
> movlw b'00001000' ;all output except /mclr
> movwf trisa
>
> banksel porta
> clrf porta ;all outputs low
>
> banksel ansel
> clrf ansel ;all pins digital
>
> etc
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-- 
Jason White - Python and C++ Programmer
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