I hesitate to even ask this question, but you DO have a common
ground line between both PICs, don't you?

Fr. Tom McGahee

>
> > ----- Original Message -----
> > From: "Greg Hartung" <ghartung@USWEST.NET>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Saturday, May 20, 2000 2:44 PM
> > Subject: usart to usart
> >
> >
> > >    I am trying to get a 16f877 to talk to another one over the built-in
> > > serial usart.  I don't think I need a Maxim or Dallas rs-232 chip.  Can
> > > I simply hook tx to rx?  Receiving 877 never gets anything.  I tried a
> > > series resistor and a pullup.  No luck.
> >