Re: [ECOS] Run Redboot from flash

[Gary Thomas <gary at mlbassoc dot com>]

On Thu, 2003-12-11 at 06:57, Ricardo Andrino wrote:
> Hello and thank you again, I will do what you say.
> Now i am running redboot fron RAM and try to run the hello program. I have made the following:
> 
> 1)Convert the elf image (with no extension or .elf or .exe) to Binary (.bin) image:
> for ARM:
> $arm-elf-objcopy -O binary hello hello.bin
> 
> 2)Open terminal:
> for Linux: Open minicom
> $ minicom
> 
> 3)Set the baud rates & other Uart parameters:
> usualy 38400 baud + 8bits + no parity + no handshake. Hardware and Software flow control NO.
> 
> 4)RedBoot> load -r -m xmodem -b 0x000200c0 ( first memory zone available after download redboot_RAM.elf) 
> 
> 5)After issuing the command send the .bin file using XMODEM protocol:
> for Linux (minicom):
> issue send file command <Cntl+A, S>, select "send xmodem", type the path to the file (.bin) & send
> 
> 6)At the Redboot prompt "RedBoot> " issue the 'go' command:
> RedBoot> go 0x20100( after 40 position for vectors, i am not sure about this, should be 0x000200c0?)
> 
> I should see the application running & the outputs on the terminal window but no output is diplayed but the led D3 light.........(EB40A)
> 
> I have made correct the redboot_RAM.elf, connecto to redboot, a hello RAM aplication etc, etc....
> 
> Any ideas?

This doesn't work because the eCos application will be linked to run
at 0x20000, but you've loaded it to 0x200C0.  If your RedBoot is truly
using all of that RAM, you'll need to adjust the memory layout for RAM
applications to start higher.  

Much simpler would be to tune your RedBoot so that it's memory use is
less.  There are a number of simple things that you can do to help this.
Try reducing the number of history lines - that should get it down
quickly.

Also, don't load ELF images (I assume that's what you tried) with -r.
This option tells RedBoot not to interpret the image at all.  What you
ended up doing was executing the ELF header - not exactly ARM code!
If things are set up correctly, you should be able to just:
  RedBoot> load -m xm
  ... send file
  RedBoot> go


> 
> Thanks in advance.
> 
> 
> 
> 
> 
> 
> 
> Nick Garnett <nickg@ecoscentric.com> schrieb am 11.12.03 12:35:45:
> > 
> > <ricardo_andrino@web.de> writes:
> > 
> > > Hello,
> > >
> > > I have built redboot (RAM start up mode) and i have followed
> > > all the instructions for EB40A board.All run correct but after
> > > programming the flash memory( fi wr -f 0x01100000 -b %{FREEMEMLO} -l
> > > 0x10000), the Prompt Redboot> doesn't allow me to type any command
> > > (hangs up)and when i set JP1 to the user position and make a reset,
> > > all leds light and redboot doesn't allow me to type any command
> > > too. Any idea?
> > > 
> > > Once Redboot is good installed in flash the way to run it is typing
> > > minicom and a redboot prompt must on the screen?
> > > 
> > 
> > If you are seeing RedBoot output the prompt then it should be ready to
> > accept input. It is very rare for one direction to work and the other
> > not. Check that minicom is not set up to expect hardware flow
> > control. Presumably you loaded a RAM RedBoot via Angel and then
> > downloaded and flashed the ROM RedBoot using that. If the RAM RedBoot
> > worked I cannot see why the ROM one fails. Try rebuilding the ROM
> > RedBoot from scratch, in a clean directory, it's a longshot but maybe
> > it was misconfigured in some way.
> > 
> > 
> > -- 
> > Nick Garnett                    eCos Kernel Architect
> > http://www.ecoscentric.com      The eCos and RedBoot experts
> > 
> > 
> > -- 
> > Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> > and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> > 
> 
> 
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-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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