Date: Sun, 12 Aug 2001 10:14:42 -0700 From: Julian Elischer <julian@elischer.org> To: Chris Ruffin <c.ruffin@ieee.org> Cc: freebsd-hackers@freebsd.org Subject: Re: serial port programming problems Message-ID: <3B76B982.99713F85@elischer.org> References: <20010812121603.D838@surge>
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Chris Ruffin wrote:
>
> I'm having serious frustrating problems when programming the serial
> ports under FreeBSD. Here's what I do:
>
> - open the port
> - stty -f /dev/cuaa2 -echo -echoe raw
> - write "ATZ"
> - wait
> - read
>
> This gives me back "ATZ\r\nOK\r\n", which is completely
> counter-intuitive to me. I have downloaded other code and tested them
> with the same results, where it is clear in the code that the port is
> not expecting to see the data that we wrote to it, only the response.
> This code, however, did not mention being tested under FreeBSD.
>
> Any ideas on what could be happening here? Is this the way it is
> supposed to work?!?
The modem is echoing the ATZ back to you..
(if you do not want that then send an ATE0 first)
> --
> Chris Ruffin <c.ruffin@ieee.org>
>
> --------------------------------------------------------------------------------
> Part 1.2Type: application/pgp-signature
--
+------------------------------------+ ______ _ __
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| / \ julian@elischer.org +------>x USA \ a very strange
| ( OZ ) \___ ___ | country !
+- X_.---._/ presently in San Francisco \_/ \\
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