[U-Boot-Users] Problem about "printf"!

[Wolfgang Denk]

In message <20050720143726.9858.qmail at web15704.mail.cnb.yahoo.com> you wrote:
> My uboot can run now! Through serial,prompt"=>"can be
> printed,but after input"help",it don't display
> commands of uboot.

Does it work ith any command at all?  For  example,  does  the  board
reset when you ype "reset" ?

> It seems as if uboot can't find the standard input and
> output devices.

What makes you think so?


> It display below:
> 
> ......
> DRAM: 16 MB 
> FLASH: 16 MB
> *** Warning - bad CRC, using default environment
> =>
> 
> 
> I find that function "printf" (in the
> /common/console.c) can't execute. WHY? Please  give me

What makes you think so?

> As below:
> 
> #ifndef CFG_CONSOLE_INFO_QUIET
>   /* Print informations */
> printf ("In:    ");
> if (stdio_devices[stdin] == NULL) {
> printf ("No input devices available!\n");
> } else {
> printf ("%s\n", stdio_devices[stdin]->name);
> }
> 
> printf ("Out:   ");
> if (stdio_devices[stdout] == NULL) {
> printf ("No output devices available!\n");
> } else {
> printf ("%s\n", stdio_devices[stdout]->name);
> }
> 
> printf ("Err:   ");
> if (stdio_devices[stderr] == NULL) {
> printf ("No error devices available!\n");
> } else {
> printf ("%s\n", stdio_devices[stderr]->name);
> }
> #endif /* CFG_CONSOLE_INFO_QUIET */

I don't see any of the "No ??? devices available!" error messages  in
your  display,  so  I don't understand why you think this should be a
problem?


Which board is this on? And which version of U-Boot?

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Madness has no purpose.  Or reason.  But it may have a goal.
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