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Re: Problem in writing to /dev/ttyS1
- From: Andrew Lunn <andrew at lunn dot ch>
- To: Giri Raja <giri_amf at yahoo dot com>
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Sun, 11 Apr 2004 13:31:58 +0200
- Subject: Re: [ECOS] Problem in writing to /dev/ttyS1
- References: <20040409214805.82613.qmail@web41704.mail.yahoo.com>
On Fri, Apr 09, 2004 at 02:48:05PM -0700, Giri Raja wrote:
> Hi,
> I'm unable to write anything on the Serial B on
> eb40a.
> I used the graphical configuration tool, and enabled
> Hardware and TTY-Mode Serial device drivers for
> /dev/ttyS1. I'm using /dev/haldiag for the other
> serial port, and using GDB to communicate with the
> board. That part is working fine and I'm getting no
> errors when I do
>
> cyg_io_lookup("/dev/ser1", &serial2);
>
> But when I try to write a test string to this serial2,
> nothing is getting printed on the hyperterminal.
Why not use gdb to trace the write call. See if the characters are
reaching the device.
> I'm using a linux machine for the GDB end a windows
> laptop for the hyperterminal, would this be a problem.
Nope.
>
> There was another mail, quoting the same problem --
>
> http://sources.redhat.com/ml/ecos-discuss/2004-03/msg00010.html
> and the remedy was to enable CYGPKG_IO_SERIAL_DEVICES
You must have this enabled or you would of gotten an error with the
lookup.
Andrew
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