PortA Doesn't Work

[Heckler]

Thanks Melanie,

That is a good troubleshooting doc to have on hand and review.


And as sbobowski noted it is much easier for a newbie to understand why/how to set a particular register if it is depicted as a binary value.

ie. cmcon = %00000111 instead of =07, Since each bit has a unique function, showing it in binary rather than hex or dec is easier for me to understand.

Thanks
Dwight

[Melanie]

Some folks think in Binary, some in Decimal, other in Hexadecimal.

I like Binary (when dealing with say up to 8 bits), because in my mind it immediately relates to those BIT positions in the PICs Registers.

It doesn't matter what you use, or if you chop and change throughout your code, the compiler doesn't care - it's there just for YOUR convenience.

The biggest confusion is when folks come along and say "What's inside the BYTE - is it Decimal or Hex or Binary?". It takes some explaining to convince people the answer is YES - It's ALL OF THOSE simultaneously! It's simply a matter of how you perceive it YOURSELF.

If you wanted to extract say just BIT 5 out of a BYTE... what's easier to visualise what is going on...

Example A.

NewByte=OldByte & %00100000

or...

Example B.

NewByte=Oldbyte & 32

or...

Example C.

NewByte=Oldbyte & $20

All three examples are EXACTLY the same. Use whichever one turns you on.

[shahidali55]

Another option to set PortA to digital automatically is Darrel's "AllDigital.pbp" . It will set the required registers on the selected device to make PortA digital and there is also a provision to see which registers have been set by the "All Digital" include.
http://www.picbasic.co.uk/forum/showthread.php?t=11100
I have used this in almost all of my 16F designs.

[Art]

Port A works, it’s port A bit 4 that doesn’t work lol!