[U-Boot-Users] Porting UBoot without UART

[Grant Likely]

On Fri, 25 Feb 2005 08:51:47 +0100, Wolfgang Denk <wd at denx.de> wrote:
> Dear Grant,
> 
> in message <528646bc0502242240233e0d7f at mail.gmail.com> you wrote:
> >
> >
> > >From the original post: "We're using some emulation box to develop our
> > SoC. Somehow the UART will the last component available for firmware
> > development."
> >
> > I don't think that is the situation that Shawn is describing.  To me
> > it sounded like he is starting firmware development before all of the
> > functionality is delivered by the hardware engineers.  I don't think
> 
> You are right. Then Ladislav Michl suggested to use  special  console
> functions   for   output,   which  works,  but  misses  most  of  the
> "interesting" startup messages which  are  printed  long  before  the
> device funtions are installed.
Ahh, thank you.  I had misunderstood what you were talking about.

> > that he is refering to initialization order.  Shawn, could you please
> > clarify?
> 
> Initialization order plays only a  role  here  as  a  console  device
> starts working too late. The native console port is the serial port.
So what needs to be modified to do this?  Create new serial_putc,
_getc, _init etc. functions that send messages to where he needs them?

Cheers,
g.