From here:
It says it is possible to collect traces via RTT. How to do this exactly? I'm using a custom board running the Nordic SLM application. I've set:
CONFIG_NRF_MODEM_LIB_TRACE_BACKEND_RTT=y
The documentation says to use Trace Collector V2 preview. Where can I find the Trace Collector V2 application?
Cellular Monitor v2.0.1 complains it "Couldn't identify trace serial port"
Hi C.T.,
Sorry for confusing you, Cellular Monitor is the final release app of Trace Collector V2 preview. I will report this to do an update on documentation.
Here are the steps to collect modem traces from RTT for the NCS v2.4.2 SLM application.
1. Adding the following overaly-rtt-modem-trace.conf to your building configuration.
CONFIG_NRF_MODEM_LIB_TRACE=y CONFIG_NRF_MODEM_LIB_TRACE_BACKEND_RTT=y CONFIG_USE_SEGGER_RTT=y
2. Build and program firmware to the device, then use the command in the following log to collect raw trace data.
H:\>nrfjprog --reset && JLinkRTTLogger -Device NRF9160_XXAA -If SWD -Speed 50000 C:/tmp/modemtraces.bin
Applying system reset.
Run.
SEGGER J-Link RTT Logger
Compiled Jun 28 2023 13:41:32
(c) 2016-2017 SEGGER Microcontroller GmbH, www.segger.com
Solutions for real time microcontroller applications
Default logfile path: C:\Users\chs1\AppData\Roaming\SEGGER
------------------------------------------------------------
------------------------------------------------------------
Connected to:
SEGGER J-Link (unknown)
S/N: 960035261
Searching for RTT Control Block...OK.
3 up-channels found:
0: Terminal
1: modem_trace
2:
Selected RTT Channel description:
Index: 1
Name: modem_trace
Size: 1024 bytes.
Output file: C:/tmp/modemtraces.bin
Getting RTT data from target. Press any key to quit.
------------------------------------------------------------
Transfer rate: 1.41 KB/s Data written: 287.56 KB B
Shutting down... Done.
3. Open the modemtraces.bin file with WireShark through Cellular Monitor->Open trace file in Wireshark.
Best regards,
Charlie
