On Mon, 26 Aug 2002 00:22:02 -0400, Kevin Moll wrote:

>Disclaimer: Other newbie trying to answer a question.
>
>I think you need to enable the pull-up resistors for portb.  IIRC, the
>internal pull-ups are disabled when you change PORTB to output.  Because=
 you
>have the LED bar tied to ground and the PIC can't source any current =
when
>the output is high (if the pull-ups are disabled), the LED's will never
>light up.  A simple test would be to turn the LED bar around and tie it =
to
>VCC instead of GND.  You'll get the complement of what you're expecting.
>Otherwise, you can add external pull up resistorts or set an OPTION bit =
(I
>don't remember which) to enable the internal pullups.
>

The port B internal pullups have no effect whatsoever on a port pin
that is set for output.=20

They are only connected to pins that are defined as inputs in the
TRISB register. And if they're turned on, of course. :=3D)

Regards, Bob

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