[U-Boot-Users] Hello world application running problem

[Jhavk]

Thanks for all the valuable info.

Actually i went thru the doc/README.standalone file
and theres a table which tell abt load and entry point
address of various architecture.

For arm load = 0x0c100000
entry pt = 0x0c100000.

I still have 2 doubts( hope it doesnt annoys u)
1.Cant i tftp my hello_world.bin to any valid address
of RAM eg "tftp 0x30000000 hello_world.bin" 

2.How do i find out the entry point of my binary
image?

Regards,
Jhavk

--- Wolfgang Denk <wd at denx.de> wrote:

> In message
> <20041029154109.80624.qmail at web12009.mail.yahoo.com>
> you wrote:
> > 
> > > I have read README.standalone. My target board
> is
> > > smdk2440(Arm 9).
> > > 
> > > So i transfer hello_world using tftp to address
> > > 0x0c100000 and then call "go 0x0c100000 hello
> world"
> 
> What makes you think that  0x0c100000  is  the 
> entry  point  of  the
> standalone application?
> 
> > > But after that the application seems to get
> stuck
> > > and
> > > nothing happens. Eventually i have to reset the
> > > board.
> 
> This is because you tried to run code where none is.
> Pay attention to
> the entry point address.
> 
> > > I have some doubts:
> > > 1. Which file should i send. I think it should
> be
> 
> This depends on which tool or protocol you use for
> the download.
> 
> > > hello_world and not the srec or bin format. I
> ran
> 
> This is wrong. hello_world is an ELF file, so it may
> only be used  by
> tools  / protocols that understand ELF files. The
> SREC file has to be
> used by tools / protocols that understand  Motorola 
> S-Record  files.
> The  BIN file has to be used by tools / protocols
> that understand raw
> binary images.
> 
> > >  command on  all 3 and found that hello_world is
> the
> > > one meant for ARM.
> 
> Wrong   again.    All    images    (hello_world,   
> hello_world.srec,
> hello_world.bin  etc)  are  all  teh  same  images,
> just in different
> format, depnding on which protocols or tools you
> want to use.
> 
> > > 2.Is the load and start address correct? May be
> its
> > > different for ARM9?
> 
> The load address ooks ok to me. The entry point is
> probably somewhere
> else.
> 
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> See us @ Embedded/Electronica Munich, Nov 09 - 12,
> Hall A.6 Booth 513
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80
> Email: wd at denx.de
> Neckties strangle clear thinking.                   
>    -- Lin Yutang
> 



		
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