[ECOS] Echo on tty/serial...

[Stefan Sommerfeld]

Hi,
>>>
>>> I want to use the serial port from my eCos application. I tried to use
>>> /dev/ttydiag, but i cannot disable the echo to the output. Every
>>> cyg_io_read() causes the echo even if i disable it using tty_out_flags 
>>> =
>>> CYG_TTY_OUT_FLAGS_CRLF and tty_in_flags = 0. An important thing to know 
>>> is,
>>> that i'm using posix. Printf works flawless.
>>>
>>> Is there another serial device which i could use (and have to enable 
>>> for my
>>> ecos)? How could it work if i also use printf?
>>
>> Yes, use the "proper" serial driver. /dev/ttydiag is intended for
>> diagnostic output and is very simple. It does not support the various
>> flags needed to disable echos etc.
>>
>> Enabling CYGPKG_IO_SERIAL_DEVICES will cause the interrupt driver
>> serial driver to be built. This then provides /dev/ser?. You will want
>> to layer on top of that the tty driver. So enable
>> CYGPKG_IO_SERIAL_TTY_TTY0 and set CYGDAT_IO_SERIAL_TTY_CONSOLE to
>> /dev/tty0. You can then use the yg_io_set_config() calls as described
>> at
>> http://ecos.sourceware.org/docs-latest/ref/io-serial-driver-details.html.
>> If you want to use termio you need to add the termio driver to the
>> stack in the same way.
>>
>
> Okay ...I enabled "Hardware serial device drivers", channel tty0, tried 
> to disable the HAL/diag options, but i don't get any printf output 
> anymore. The system reboots automatically after some seconds (maybe due 
> to a printf buffer overflow). I'm not sure what inits the posix main call 
> does. serial1 test is working.
>
> What's wrong? I need printf, but like to take over the control over the 
> serial port by myself. I only have one serial port.

I played a bit with it ... diag_printf is working, but i cannot open tty0 
or ser0. printf isn't working too.

Is there a why to force using diag_printf as printf replacement? How can i 
use both diag_printf and open the serial port?

Bye... 


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