3 Jan
2022
3 Jan
'22
11:08 a.m.
TDI - TP8
TCK - TP17
TDO - TP16
TMS - TP18
Looking at the board from the battery compartment side with the top of the phone pointing
North/Up I see at least TP17 is near the right-hand bank of test points visible from the
battery compartment. From left-to-right there I see something 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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<html><body><div style="color:#000; background-color:#fff;
font-family:arial, helvetica, sans-serif;font-size:10pt">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.<br><br>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.<br><br>I was wrong too... it
was TP16 not TP6, so I found TP16 but still haven't located TP8 on the C139
schematic.<br><br>-Craig<br><div><span><br></span></div><div><br></div>
<div style="font-family: arial, helvetica, sans-serif; font-size: 10pt;">
<div style="font-family: times new roman, new york, times, serif; font-size:
12pt;"> <div dir="ltr"> <hr size="1"> <font
face="Arial" size="2"> <b><span
style="font-weight:bold;">From:</span></b> Craig Comstock
&lt;craig_comstock(a)yahoo.com&gt;<br> <b><span
style="font-weight: bold;">To:</span></b>
"baseband-devel(a)lists.osmocom.org"
&lt;baseband-devel(a)lists.osmocom.org&gt; <br> <b><span
style="font-weight: bold;">Sent:</span></b> Thursday, October 3,
2013 9:57 AM<br> <b><span style="font-weight:
bold;">Subject:</span></b> c139/c140 jtag anyone?<br>
</font> </div> <div class="y_msg_container"><br><div
id="yiv5755079058"><div><div
style="color:#000;background-color:#fff;font-family:arial, helvetica,
sans-serif;font-size:10pt;">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.<br><br>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?<br><br>From what I can gather from the
schematics:<br>TDI - TP8<br>TCK - TP17<br>TDO - TP16<br>TMS -
TP18<br><br>Looking at the board from the battery compartment side with the
top of the phone pointing North/Up I see at least TP17 is near the right-hand bank of test
points visible from the battery compartment. From left-to-right there I see something
like: TP12, TP18?, TP16?, TP17 so it looks like I have two of the TPs I need: 17 and
18.<br><br>I can't seem to find TP6 or TP8 anywhere on the
schematic.<br><br>-Craig<br><div><br></div></div></div></div><br><br></div>
</div> </div> </div></body></html>
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