I cracked open the shield on my C139= and didn't see the TPs I expected from the schematic. I thought maybe the an= gle 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_worl= d on my C115 seemed to fail in a similar fashion as it does on my C139 so may= be 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(a)yahoo.com>
To: "baseband-devel(a)lists.osmocom.org" <baseband-devel(a)lis= ts.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 de= bugger w/ JTAG. I figured I could probably use serial line logging somehow bu= t JTAG seems better and I should learn it anyway.

Has anyone pried ope= n 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 t= he battery compartment?

From what I can gather from the schematics:
TDI - TP8
TCK - TP17
TDO - TP16
TMS - TP18

Lo= oking at the board from the battery compartment side with the top of the phon= e pointing North/Up I see at least TP17 is near the right-hand bank of test p= oints visible from the battery compartment. From left-to-right there I see so= mething like: TP12, TP18?, TP16?, TP17 so it looks like I have two of the TPs= I need: 17 and 18.

I can't seem to find TP6 or TP8 anywhere on the schematic.
-Craig

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