Couldn't get connectivity to Motorolla c118 on writing osmocombb

baymax Robo baymax254 at gmail.com
Thu Jun 1 04:30:48 UTC 2017


Hi,

I am trying to write osmocombb to Motorolla c118 phone by following the
given [1] guide.I have successfully compiled firmware binaries but having
issues while writing them to phone.

I connected motorolla c118 via USB Serial To RS232 TTL to 2.5mm audio jack,
using the given guide [2]

When I run this command

$ dmesg | grep tty

I get the following output

[    0.000000] console [tty0] enabled
[   14.946936] usb 3-6: pl2303 converter now attached to ttyUSB0
[  973.747957] pl2303 ttyUSB0: pl2303 converter now disconnected from
ttyUSB0
[ 1484.595816] usb 3-6: pl2303 converter now attached to ttyUSB0
[ 1845.344494] pl2303 ttyUSB0: pl2303 converter now disconnected from
ttyUSB0
[ 2643.566407] usb 3-6: pl2303 converter now attached to ttyUSB1

And on running this

$ sudo cu -l /dev/ttyUSB1 -s 115200

I get a connected message but no further progress is done. When i press
Power button briefly, no activity is shown. I have tried with two phones
but no success on any. I have checked the connectivity between headphone
jack and USB serial chip via voltmeter, it is fine as well. Also tried by
doing Master reset on phone but no use. What can be issue and how can i fix
it. ?

Kindly ignore any mistakes, i am new to this domain, couldn't find much
help on google as well :(

[1]
https://osmocom.org/projects/baseband/wiki/Software_Getting_Started
https://osmocom.org/projects/baseband/wiki/Osmocon

[2]
http://www.linuxx.eu/2014/09/osmocombb-hardware-and-software-setup.html

[2]
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