David Duffy (AVD) wrote:
>> 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.
>
> This is probably where I'm missing something.  The structure of the
> ports is obviously different to what I'm used to.

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.

> I did read the data
> sheet, but have not yet got a grip on how the port really work.

Again, ignore LAT and they work just like on a PIC 16.


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