[U-Boot-Users] Problems with Hello_world example

[Wolfgang Denk]

In message <LAW12-F23kjho31VINg0005f0dc at hotmail.com> you wrote:
> 
> we're using u-boot in a DBPXA250 based platform. We've burnt u-boot in Flash 
> memory and successed to communicate with it using hyperterminal or minicom. 
> Then we've loaded hello_world.bin in 0x00040004 and typed in u-boot's 
> prompt:
>   go 40004 Hello world

This is wrong. Load at 0x00040000 and start at 0x00040004.

> When this example is compiled, we are using the binary file that is created 
> but, is this binary file created for our platform or does this example only 
> work with some specific architectures?? Should it work correctly in our 
> DBPXA250 bassed platform??

It should work on all platforms. I never tested it on DBPXA250, though.

> The u-boot's messages say that stdin, stdout and stderr are in the serial 
> port (because we aren't initializating the LCD). The hello_world example 
> program is printing messages using the printf() function and we suppose that 
> when we compile for our system, the printf() function is trying to print 
> those messages through the stdout of our system (that in this case is the 
> serial port, isn't it??). So why can't we see the messages that is printing 
> the Hello_world application thought serial line??? Why are we only seeing 
> those numbers (03 3 3)??? It can't be a baudrate problem, can it??

This is most probably a usage error. See above.


Best regards,

Wolfgang Denk

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