Connecting J-Trace with the nRF52DK

RE: Connecting J-Trace with the nRF52DK

brolive — Thu, 06 Jun 2019 11:32:11 GMT

Thank's the link to the other subject helped a lot, since there are the Schematics & Altium files of this particular adapter.

RE: Connecting J-Trace with the nRF52DK

Vidar Berg — Wed, 05 Jun 2019 14:39:15 GMT

I think you will need a custom adapter or find an adapter which you can solder on jumper wires to connect to the trace pins. Here's a similar thread on this subject: link.

52832 Pin assignments for trace

17	P0.14 TRACEDATA[3]	Digital I/O	General purpose I/O Trace port output
18	P0.15 TRACEDATA[2]	Digital I/O	General purpose I/O Trace port output
19	P0.16 TRACEDATA[1]	Digital I/O	General purpose I/O Trace port output
20	P0.17	Digital I/O	General purpose I/O
21	P0.18 TRACEDATA[0] / SWO	Digital I/O	General purpose I/O Single wire output Trace port output
22	P0.19	Digital I/O	General purpose I/O
23	P0.20 TRACECLK	Digital I/O	General purpose I/O Trace port clock output

So P0.14 should be connected to TRACEDATA[3], P0.15 to TRACEDATA[2], and so forth.

RE: Connecting J-Trace with the nRF52DK

brolive — Tue, 04 Jun 2019 12:06:07 GMT

I'm afraid it doesn't really, I've red them already. In the picture of the first post mentioned, there is an adapter which isn't described where to be bought or what pins it maps where to. Could you please elaborate on how the connection is supposed to be made from a 2x 10 JTAG to these pin headers on the DevKit?

I know the pin mapping of the JTAG as described here on page 335 of the J-Link_J-Trace PDF. (or image below)

www.segger.com/.../-2:320:50]

And I know the pin mapping of the nRF52DK as shown in the map below.

But how do these two match?

E.g. where do pin numbers:

8
1
11 & 13

of the JTAG Cortex-M Adapter Map to on the DevKit?

RE: Connecting J-Trace with the nRF52DK

Vidar Berg — Tue, 04 Jun 2019 11:50:49 GMT

Hi,

I think you will find these blog posts useful:

- https://devzone.nordicsemi.com/nordic/b/blog/posts/debugging-nrf52-series-devices-using-trace

- https://devzone.nordicsemi.com/nordic/b/blog/posts/nrf52-tutorial-etm-instruction-trace-with-keil-mdk

And the pin mapping is documented in the PS here: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/dif.html?cp=3_1_0_15_4#trace