Re: [9fans] serial port programming

[presotto@plan9.bell-labs.com]

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Short answer:

	cat /dev/eia0

Longer answer:

	look at /sys/src/cmd/ip/ppp/ppp.c:2437-2451

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I know the world of computing has forsworn manuals
for a variety of reasons, but it's a valid approach in
Plan 9.

So, read uart(3) first. It explains how to configure
a uart by opening the ctl file and writing simple
strings. You read and write it by reading and writing the
data file. As they used to say on a game show here,
"that's all there is to it".

If you need more, then try

src con

the source of the terminal emulator.


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From: Sam Ducksworth <sam@ducksworth.com>
To: 9fans mailing list <9fans@cse.psu.edu>
Subject: [9fans] serial port programming
Date: Thu, 15 Feb 2001 09:10:07 -0800
Message-ID: <3A8C0D6F.17395EC2@ducksworth.com>

i would like to write a simple plan9
program that i can use to pull serial
data from a microcontroller based data
logger that i have constructed. does
anyone know where i could find some
sample code that shows how plan9
handles serial port I/O.

-sam