[ECOS] i386 RedBoot serial

Ecer, Jiri jecer@Rational.Com
Thu Feb 7 11:21:00 GMT 2002


I am interested in separating the ecos application's standard I/O from the
communication with gdb. The gdb link should use one serial port and the IO
the other. When I tried to change CYGDAT_LIBC_STDIO_DEFAULT_CONSOLE from
/dev/ttydiag to /dev/tty0 or /dev/tty1, the application receives SIGSEGV in
Cyg_StdioStream::flush_output_unlocked as soon as anything is outputted to
standard output. I made sure that CYGPKG_IO_SERIAL_TTY_TTY0 and
CYGPKG_IO_SERIAL_TTY_TTY1 are enabled.

So, I am looking for information on how to do that.

Thank you

Jiri

-----Original Message-----
From: Jonathan Larmour [mailto:jlarmour@redhat.com]
Sent: February 7, 2002 1:24 PM
To: Ecer, Jiri
Cc: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] i386 RedBoot serial


"Ecer, Jiri" wrote:
> 
> Hi,
> 
> Is there documentation that expalins the relationship between the two
serial
> ports and the diag serial device?

Sounds like a vague question. What do you need to know?
 
> I am using a PC with two serial ports and trying to use the first serial
> port for redboot and for the gdb <->  eCos link and the second port for
the
> ecos application's standard input and output. I have tried configurations
> that made sense to me without success. In particular:
> 
> Redboot posts boot message on all available serial port and claims the one
> that receives the first character as the one (as described in the original
> message). This port can then be used by the ecos application to
communicate
> with gdb. Can the other port be used as well (in my case for standard
I/O)?

Yes.

Jifl
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