gnupic: 16F877 I/O
Subject:
Re: 16F877 I/O
From:
Scott Dattalo ####@####.####
Date:
8 Mar 2004 19:19:35 -0000
Message-Id: <Pine.LNX.4.44.0403081044020.23159-100000@ruckus.brouhaha.com>
On Mon, 8 Mar 2004, Gaston G. Izaguirre wrote:
> Hi,
>
> I'm trying to implement serial rs232 communication for the PIC16F877 by
> software instead of using the built-in UART (dedicated to other task). What
> resources (links, lectures, source code, etc) would you recomend me for this
> task.
I'd recommend dedicating TMR2. If you only need to transmit from the F877
then you can program TMR2 to generate an interrupt equal to the time for a
single bit. If you have to receive as well, then you're going to want to
poll at least 3 times faster and use a majority weighting to determine the
sampled bit. You may wish to search piclist.com (before you do this,
you'll have to turn on cookies in your browser...) for an example.
Scott
