* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
@ 2014-10-12 22:22 99% ` Paul Colquhoun
0 siblings, 0 replies; 1+ results
From: Paul Colquhoun @ 2014-10-12 22:22 UTC (permalink / raw
To: gentoo-user
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On Sun, 12 Oct 2014 16:42:22 Kerin Millar wrote:
> On 12/10/2014 13:08, meino.cramer@gmx.de wrote:
> > Hi,
> >
> > I want to send commands to ttyO1 (serial port on an embedded
system).
> > The commands are one line each and terminated with CRL/LF (aka
"DOS").
> >
> > Since this will be done from a batch script, it should be possible
> > via commandline tools and non-interactively. The serial port is
> > already setup up the right way.
> >
> > I tried
> >
> > echo -n"blablabal\x0a\x0d"
>
> Firstly, this command is missing the -e switch. Secondly, the order of
> the control characters is wrong. I would suggest the use of printf as it
> has fewer pitfalls.
>
> # printf '%s\r\n' "command"
>
> --Kerin
Also, are you sure that the standard output of the script is connected to
the serial port? Try adding "> /dev/tty01" to the end of the echo/printf
command lines and see if that helps.
--
Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/
Asking for technical help in newsgroups? Read this first:
http://catb.org/~esr/faqs/smart-questions.html#intro
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2014-10-12 12:08 [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!? meino.cramer
2014-10-12 15:42 ` Kerin Millar
2014-10-12 22:22 99% ` Paul Colquhoun
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