Olin Lathrop wrote:
> David Duffy (AVD) wrote:
>  =20
>>> Writing values to the port registers isn't going to have any effect
>>> until you set the pins to outputs.  At the very least this means
>>> clearing the TRIS bits, but may also require disabling analog
>>> peripherals associated with the pins of interest.  Just writing 0
>>> then some value to the port registers has no chance of producing a
>>> visible result without making pins outputs.
>>>      =20
>> This is probably where I'm missing something.  The structure of the
>> ports is obviously different to what I'm used to.
>>    =20
>
> Not really.  The TRIS and PORT registers work just like on a PIC 16.  The
> PIC 18 also has LAT registers, but you can still use the PORT register as
> you did before.
>
>  =20
>> I did read the data
>> sheet, but have not yet got a grip on how the port really work.
>>    =20
>
> Again, ignore LAT and they work just like on a PIC 16.
>  =20

Yes, my silly mistake was in the port initialisation. I have no idea why=20
I wrote PORTx where I meant TRISx.  That coupled with me not=20
understanding the banking was my undoing.  Maybe I shouldn't try to=20
learn a new chip so close to bedtime!
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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