Re: [ECOS] Re: Hi there!

[Jesper Skov <jskov at redhat dot com>]

On Mon, 2002-04-22 at 13:47, Jonathan Larmour wrote:
> Please CC the ecos-discuss list!
> 
> Andrew Lai wrote:
> > 
> > Hi there,
> > 
> > Have been having trouble with printf and diag_printf() subroutines, I've
> > been using.  This occurs with the twothreads.c example that has been
> > distributed with eCos.
> > 
> > The following code fragment in twothreads.c:
> > 
> >      cyg_mutex_lock(&cliblock); {
> >        printf("\nThread %d: and now a delay of %d clock ticks(%d)\n",
> >              message, delay,x);
> >      }
> >      cyg_mutex_unlock(&cliblock);
> > 
> > It produces the following output which is clearly wrong:
> > 
> > Thread 0 w and now a delay of
> > now a delay of
> > 
> > Note how the characters are being dropped intermittently and not being
> > displayed.  I think I need to change something in the printf
> > routines......not sure what....
> 
> It looks like the varargs support in the *compiler* has gone wrong in some
> way.

Sorry, no, IMO it looks like an unreliable serial connection is being
used, and characters are being dropped. I see something similar if I use
the CD drive under Linux while trying to use the serial connections.

Jesper


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