GRPS decode - trying to download firmware to C123

Lukas Kuzmiak lukash at backstep.net
Sun Aug 28 23:55:59 UTC 2011


Hey,

If I'm not mistaken pl2303 based cables have/had problems handling baudrates
above 115200, there was a recent update into the kernel tree, but I've never
tested it.

If you have FTDI based cable try it out, i have one based on FT4232 and it
works flawlessly, pl2303 cable gave me a lot of trouble before.

You can still run osmocom-bb on 115200 cable but I believe it's not going to
be sufficient for sniffing and i think you'll need to patch the code a bit
for 115200 to work (perhaps someone from osmocom can guide here?).

Cheers,
Lukas

On Mon, Aug 29, 2011 at 1:09 AM, smithmr103 at gmail.com
<smithmr103 at gmail.com>wrote:

> Hello list,
>
> I'm newbee so excuse me for my very basic question.
> I follow all the instructions on srlabs.de/gprs given by Karsten
>
> I have a C123 and a USB / jack 2.5mm - pl2303 based :(
>
> All steps are fine until I try to programm the compal ram ;)
>
> ./host/osmocon/osmocon -m c123xor -p /dev/ttyUSB0
> ./target/firmware/board/compal_e88/layer1.compalram.bin
>
> I get :
>
> ...
>
> PROMPT1...
> ...
> PROMPT2...
> handle_write(): xxxx bytes (xxxx/yyyy)
> ...
> ...
> handle_write(): xxxx bytes (xxxx/yyyy)
> Received 1 byte : xx
> Received 1 bytes : yy
> ...
> ...
> Finally I received e.r.r.o.r (byte by byte)
> NOT ACK RECEIVED...
>
> I can also get (not with the same firmware...) :
>
> ...
> PROMPT1...
> ...
> PROMPT2...
> handle_write(): xxxx bytes (xxxx/yyyy)
> ...
> ...
> handle_write(): finished
>
> and then... nothing...
>
> I'm going to test the cable, as Philipp has told to Pavel.
> I also bought a RS232 / Jack unlocking Motorola (C123) cable and I own a
> BlackBox FTDI based USB/RS232 cable... So I'll test it as soon as I
> receive the cable.
>
> Do you think is a matter of cable, who is supposed to be osmocom
> compatible, or a phone issue or even the USB port... ?
>
> Thank you very much for your help and excuse me again with this kind of
> 'stupid' question about cable.
> I read almost all the subjects, I did a lot of experimentations in a lot
> of git branch (master, testing, burst_ind - of course not working with
> PL2303 ... + d1cb8ea9b784c7acbafbb2fdcedbdf4655c2f6f5 not working too)
>
> I think it must work at least in the master branch...
>
> Smith
>
>
>
>
>
>
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