Getting the "Reading register 29, 30, 31 Failed: Unspecified Error" on debugging with SEGGER

[Mehmet Alici]

Hello,

I get the following output when I try  to debug the Zephyr's button sample with SEGGER Embedded Studio:

Preparing target for download
Executing Reset script TargetInterface.resetAndStop()
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Reading register 29 failed: Unspecified error
Reading register 30 failed: Unspecified error
Reading register 31 failed: Unspecified error
Downloading ‘zephyr.elf’ to J-Link
Programming 12.2 KB of addresses 00000000 — 000030ef
Programming 0.1 KB of addresses 000030f0 — 0000319b
J-Link: Flash download: Bank 1 @ 0x00000000: 1 range affected (16384 bytes)
J-Link: Flash download: Total time needed: 0.540s (Prepare: 0.034s, Compare: 0.006s, Erase: 0.351s, Program: 0.140s, Verify: 0.000s, Restore: 0.006s)
Download successful
Reading register 29 failed: Unspecified error
Reading register 30 failed: Unspecified error
Reading register 31 failed: Unspecified error

However, the software runs on the board as I can see the correct UART output when I push buttons.

Following is the information over my development environment:

SEGGER Version: V4.42a (64 Bit)

Ncs Version: master commit 4bc7b215

Zephyr Version: manifest-rev commit 4bc7b215

JLink Version: JLink v6.62a

Dev-Kit: nRF5340 PCA1005

Already done:

- Tried hello_world sample and get the same result.

- Checked out to the current latest version of ncs, i.e master branch commit a297ff and performed west update. However, this didn't help as well.

[Mehmet Alici]

Update:

When I tried the solution to a different problem under the link,

https://devzone.nordicsemi.com/f/nordic-q-a/59312/nrf5340-pdk-segger-download-error-cpu_reg_set-register-0-is-already-marked-as-valid

my problem also disappeared.