c139/c140 jtag anyone?

Craig Comstock craig_comstock at yahoo.com
Fri Oct 4 15:08:50 UTC 2013

I cracked open the shield on my C139 and didn't see the TPs I expected from the schematic. I thought maybe the angle of the photo on osmocom hid the TPs but it really didn't.

I'll try my C115 instead since that is more clear and accessible. Flashing hello_world on my C115 seemed to fail in a similar fashion as it does on my C139 so maybe the same issue exists there.

I was wrong too... it was TP16 not TP6, so I found TP16 but still haven't located TP8 on the C139 schematic.


 From: Craig Comstock <craig_comstock at yahoo.com>
To: "baseband-devel at lists.osmocom.org" <baseband-devel at lists.osmocom.org> 
Sent: Thursday, October 3, 2013 9:57 AM
Subject: c139/c140 jtag anyone?

I'm at the point w/ flashing firmware where I feel like I need to use a debugger w/ JTAG. I figured I could probably use serial line logging somehow but JTAG seems better and I should learn it anyway.

Has anyone pried open the shield on a c139/c140 and tried attaching to the JTAG test points that are just inside the shield next to the test points which are accessible via the battery compartment?

More information about the baseband-devel mailing list