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Try using a 1K pull down from the gate to ground on your MOSFET's. I have found that sometimes they get a little flaky with PWM and the 1K seems to make a huge difference.

Well, turns out the code was not the issue here.. Seems my WinPic tool I use to write to the chip could not find the device files from MPLAB. I reset the path, it found its device files, and now I...

Here is the latest code bit:

define osc 4

CMCON = 7

TRISA = %11111111
TRISB = %00000000

PB0 VAR PORTB.0

>>You say : I connect my switches to PortA ... and you define PortB as the inputs ... while you read Portb.

I did have PORTA originally. I switched to PORTB for testing.

same results, no...

I am trying to get my 628 to read PORTA as input for a BCD switch. I am having problems though.

I tried CMCON = 7 and TRISA = %00001111

I set the switch on PORTA.0 - PORTA.3

Couldnt get...

External pullups aren't a problem, thats easy.
just had to figure out HOW to tell port A not to be fancy, just be a lowly input pin.


As for me, Tech no code since 92.. Living in Dallas TX area...

I found my answer!!!

CMCON and VRCON control the configuration and behavior of PORTA..

wow.. love these things, learing a lot just flashing LED's

I too am a NU B. I understand the coding from Melanies example. But how would I config PORTA 0-3 to read my switch. Seems the option register only controls port B options. I know it is probably uber...