ivp wrote:
> David,
>
> 18F don't have banks (yay !!!), so BANKSEL is not needed
>  =20

Hi Joe,
Good news indeed. :-)

> Each pin has a PORT register, intended for inputs, and a LAT for
> outputs. Writing to PORT should do what you want, although not
> all PORTx are bi-directional. Some are input only so it's better to
> use LAT for outputs
>  =20

Gotcha. That makes sense.

> That aside, have you set the pins as digital ? I'm not familiar with
> that particular 18F but at least some need ADCON1 bits set to
> make the default analogue pin digital. Others are controlled with
> ANSEL/ANSELH
>
> Have you selected an oscillator configuration and is the chip running ?
>
> What do you have in the CONFIG statements ?
>
> /MCLR ?
>  =20

I used the supplied template (actually a slightly modified 18F46K20 file=20
as there is no 18F45K20 version) which has the configuration settings=20
laid out quite well.

I have set the oscillator for INTIO67, watchdog is off, MCLRE is on, LVP=20
is off.

All I have here at home is the PK3, the demo board, MPLAB and a small=20
DMM. Vdd is valid (+3.25V) and the demo board did work (pre-programmed=20
as running LEDs) out of the box.

> Do you have the datasheet ?
>  =20

I do, but the problem is that the 18 series is quite different to what=20
I'm used to. I'm sure I'll get to understand the expanded instruction=20
set in due course, but I'm at the steep end of the curve just now.

I'm usually ok with learning new things once I have a known working file=20
to start with. I don't claim to be an expert programmer - PICs are only=20
a small part of my everyday activities.
David...

--=20
___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
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