[okl4-developer] does linux(Wombat) re-configure UART when booting?

[Jorge Torres]

Hi Kashin,

I believe that wombat uses the iguana serial driver,

Cheers,

Jorge

On 9/12/07, kashin Lin <kashin08 at gmail.com> wrote:
>
> Hi,
>
> so do you think what may cause this situation happened?
> ( the output just stopped after "*Backed PXA serial*" as i mentioned in
> last letter )
>
> the system crash ? or the linux kernel just output messages by different
> way (ex: not through RS232 or it use different UART setting) ?
>
> thanks for your suggestions.
>
>
> 2007/9/12, Jorge Torres <jorge.torres.maldonado at gmail.com>:
> >
> > Hi Kashin,
> >
> > Printk is used for outputs inside the Linux kernel in an interrupt
> > context and process context, meaning that it will allways happen, which is
> > not the case of printf.
> >
> > Cheers,
> >
> > Jorge
> >
> >
> > On 9/11/07, kashin Lin < kashin08 at gmail.com> wrote:
> >
> > > i build okl4 for my pxa270 develop board and upload the image on it.
> > > but the ouput messages just stop appearing as following:
> > >
> > > *OKL4 - (provider: Open Kernel Labs) built on Sep 4 2007 03:31:16
> > > using gcc version 3.4.4.
> > > init_spaceids:125: Init spaceids 256 spaces
> > >
> > > *****************************************
> > > * Iguana system, Copyright 1996-2006 *
> > > * ERTOS - National ICT Australia *
> > > *****************************************
> > >
> > > vbase is 0x1302000, vend is 0xcfffffff
> > > addr is 0x1302000, vbase is 0x1302000
> > > PXA25X OS Timer driver starting...
> > > PXA25X wrap handler installed
> > > Using FFUART.
> > > Backed PXA serial*
> > >
> > > the stop timming seems to be at the beginning of Wombat which
> > > use "printk" as it output function.
> > > ( the function for ouputing the message i got (above) seems to be
> > > "printf" ).
> > >
> > > so i think there are two posible causes:
> > > 1. "prink" use the different way to ouput (comparing to "printf" )or
> > >     Wombat re-configure UART, so the full system is working but
> > >     i can't see the ouput messages.
> > >    ( the required setting to connect my develop board by RS232 is 9600
> > > 8 n 1)
> > >
> > > 2. the system is really stopping due to some reasons...
> > >
> > > so how can i recognize which one is the actual cause of this
> > > situation?
> > > will option 1 occur?
> > > (i'm not sure the difference between printk & printf's implementation
> > > )
> > >
> > > _______________________________________________
> > > Developer mailing list
> > > Developer at okl4.org
> > > https://lists.okl4.org/mailman/listinfo/developer
> > >
> > >
> >
>
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