Error when trying to debug custom module using Segger_RTT on the NCS

[Glenyz]

Hi,

I am trying to flash thread: CLI example from the NCS onto my custom board. The MCU on the board is still the nrf52840 and I am using the SWDIO and SWCLK pins from the nrf52840dk to flash onto my custom board.

I have used this method to flash other firmware onto the same module and was successful doing it, so flashing shouldn't be a problem. However, this is my first time using NCS to try and debug my board and I'm not sure what I'm doing wrong.

Here's what I see on the RTT viewer when I connect to it:

SEGGER J-Link V7.94e - Real time terminal output
SEGGER J-Link (unknown) V1.0, SN=683693059
Process: JLink.exe
[00:00:00.001,312] <err> qspi_nor: JEDEC id [ff ff ff] expect [c2 28 17]
[00:00:00.002,960] <inf> ieee802154_nrf5: nRF5 802154 radio initialized
[00:00:00.010,742] <inf> fs_nvs: 8 Sectors of 4096 bytes
[00:00:00.010,742] <inf> fs_nvs: alloc wra: 0, fd0
[00:00:00.010,742] <inf> fs_nvs: data wra: 0, 70
*** Booting nRF Connect SDK 3758bcbfa5cd ***
[00:00:00.016,693] <inf> cli_sample: 

Any help or insight is greatly appreciated.

Best regards,
Glen

[Einar Thorsrud]

Hi Glen,

From what I can see there sample started successfully, but there was an error communicating with an external flash device. Is the problem that you are buidling for a board with board files that enable the flash but you do not have it on your hardware?

But other than that it seems the sample should be working?

If you are new to nRF Connect SDK I would suggest you start with nRF Connect SDK Fundamentals.

[Glenyz]

Hi, Einar

I solved the problem by creating a new board overlay and disabling the qspi (not entirely sure why it worked). I also had to change some configs regarding the RTT viewer so that I can do some basic I/O operation with my custom board.

For future reference is there anywhere where I can read on these config settings for tasks like these?

Best regards,
Glen

[Einar Thorsrud]

Hi Glen,

I am glad to hear you got it working. If using a custom board, it makes sense to make separate board fiels for your board (instead of using DK files with overlays describing the difference). I recomend you take a look at the nRF Connect SDK Intermediate course which covers that.

Regarding configs, if you ask about logger specific configs you can refer to Logging in nRF Connect SDK.

Einar