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.

-Craig




________________________________
 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?


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