RE: [ECOS] How can I use diag_printf() in ecos ram application? thanks

["Qiang Huang" <jameshq at liverpool dot ac dot uk>]

Thank you very much for your help.

program:
void cyg_user_start(void)
 {
 	diag_printf("Hello everyone\n");
 }

I used the following steps:

arm-elf-gdb -nw a.out
set remotebaud 57600
target remote com1
load
continue

Hello everyone
Hello everyone
Hello everyone
Hello everyone
.........
Hello everyone

then I *can* see the output from the screen.
(Did the output come from the mangler?) Does this imply the mangler is ok?

But I can *not* see the output when I use Insight to run the program
(console window of Insight).


thanks again.

-----Original Message-----
From: Jonathan Larmour [mailto:jifl@eCosCentric.com]
Sent: 18 February 2003 17:03
To: Qiang Huang
Cc: Ecos-Discuss
Subject: Re: [ECOS] How can I use diag_printf() in ecos ram application?
thanks


Qiang Huang wrote:
> Thanks a lot Jonathan, but could you give me a little detail how I can use
> the diag_printf(). I changed it to following:
>
> void cyg_user_start(void)
> {
> 	diag_printf("Hello everyone\n");
> }
>
> but still no output from the console window (in Insight)
>
> but when I load the program via hyperterminal as:
> load -m xmodem
>
> go 0x040000
>
>
> then I can see the output from the hyperterminal.  Did I miss anything for
> the mangler?

The mangler requires no specific support as such. But if this is a new
port you've been doing, you may have made a mistake in the definitions -
perhaps your default CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL is
different from CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL.

What I would guess is happening, one way or another, is that the output
from your program isn't coming out in GDB format... instead it's coming
out in plain text (as could be viewed by hyperterminal). However such
output would be discarded by GDB.

You could see if this is the case by doing:

void cyg_user_start(void)
{
    for(;;)
	diag_printf("Hello everyone\n");
}

and after loading and continuing via GDB, then kill your GDB session
(don't ctrl-c your app first - just kill GDB). Then connect via
hyperterminal and see if the output is there.

Jifl
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