Can't get RTT working on L15 using J-Link Plus.

[Calvin T]

I can flash the chip. I can run the debugger. I can go to the connected devices, select the device, go to the little "plug" symbol on the RTT, and select it. That brings up a window asking me to select a device. I select the j-tag device, and then select the processor. It appears to work, but then when I try to run the debugger, I get this:

[00:00:00.390,843] <inf> eeprom_drvr: EEPROM initialized
[00:00:00.391,242] <inf> rgb_led_drvr: LED driver initialized
*** Booting nRF Connect SDK v3.0.0-3bfc46578e42 ***
*** Using Zephyr OS v4.0.99-3e0ce7636fa6 ***
[00:00:00.391,493] <inf> sp_log: Initializing Device: smartpac_l15_eval

[00:00:00.393,514] <inf> fs_nvs: 2 Sectors of 4096 bytes
[00:00:00.393,521] <inf> fs_nvs: alloc wra: 0, f10
[00:00:00.393,525] <inf> fs_nvs: data wra: 0, 120
[00:00:00.393,614] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
c7 53 7d bc 06 12 f7 c0 b3 3a 3e 28 8e 56 1e d7 |.S}..... .:>(.V..
a0 be 95 b0 |....
[00:00:00.395,368] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.395,386] <inf> bt_hci_core: HW Variant: nRF54Lx (0x0005)
0m
m

And then nothing else. A colleague has repeated the process, and the RTT works fine on their system. I'm running nrfutil-device 2.11.0. The nRF connect toolchain and SDK are both 3.0.

Any thoughts?

[Simonr]

Hi

Please confirm what version of the J-Link firmware is installed on your computer. I assume this log is within the VS Code extension, correct, or do you use a dedicated J-Link RTT viewer here? Also compare J-Link version your colleague has.

Best regards,

Simon

[Calvin T]

My system:

nrfutil:

91 0.5.0 Not installed
ble-sniffer 0.16.2 Not installed
completion 1.4.0 1.5.0 Upgradeable
device 2.11.0 2.11.0 Installed
npm 0.3.0 Not installed
nrf5sdk-tools 1.0.1 1.1.0 Upgradeable
sdk-manager 1.3.0 Not installed
suit 0.9.0 Not installed
toolchain-manager 0.15.0 Not installed
trace 4.0.1 Not installed

Segger J-Link 8.32

J-Link Compact PLUS V12.00

Jesse's system:

nrfutil:

91                          0.5.0  Not installed

ble-sniffer                 0.16.2 Not installed

completion        1.5.0     1.5.0  Installed

device            2.7.12    2.11.0 Upgradeable

npm                         0.3.0  Not installed

nrf5sdk-tools     1.1.0     1.1.0  Installed

sdk-manager                 1.3.0  Not installed

suit                        0.9.0  Not installed

toolchain-manager           0.15.0 Not installed

trace                       4.0.1  Not installed

Segger J-Link 8.28

J-link Compact PLUS V11.00

[Calvin T]

And, yes--this was done through the nRF Connect extension.