NRF54L15 Zephyr Blinky Sample did not start at Power on

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Edvin — Tue, 04 Feb 2025 13:56:25 GMT

[quote user="Gerd Breidenstein"]Don't know how ti attach zip[/quote]

just drag and drop it into where you are typing. Alternatively: Insert -> image/video/file -> then click the upload button:

It is not clear to me whether they have put a 32kHz Crystal (LFXTAL) in that module. I can't seem to find any datasheets. If you are not sure, reach out to the distributer that you used to purchase the module, and ask if you can get the datasheet.

Does the way that you supply power change when you are running the debug session and when you are trying it without the debugger attached?

Best regards,

Edvin

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Tue, 04 Feb 2025 11:40:14 GMT

Hi Edvin

Don't know how ti attach zip
I used a Ublox NORA-B206-00B on a prototype PCB

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Edvin — Tue, 04 Feb 2025 11:27:35 GMT

That is strange. Can you please zip and upload the application where this happened, and I can have a look. I don't know what happens if you don't provide any clock source. Perhaps it defaults to the RC Oscillator.

What HW are you running this on? Custom hardware, or an nRF54L15 DK?

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Tue, 04 Feb 2025 07:11:53 GMT

Hi Edvin
It did not work with "CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y"

but ... when I added

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=n

CONFIG_CLOCK_CONTROL_NRF=n

to my prj.conf a CMake warning came up "No SOURCES given to Zephyr library: drivers__clock_control"

and the programm started as normal

Does this help you to find the reason od my starting problem?

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Edvin — Thu, 30 Jan 2025 08:37:11 GMT

Hello,

Sorry for the late reply (had to stay at home with the kids after being assigned your ticket).

So it only runs if you start it manually using JLink commander, right?

What HW are you running on? I suspect it is not an nRF54L15 DK, but a custom board, or a 3rd party kit?

If it only runs when started by JLink, I suspect it is a clock "issue". That is usually the case when something only runs in a debug session, but not when run normally. The cause is usually that the LFCLOCK (32kHz) is not properly configured. Since the LFCLK XTALis optional, some 3rd party or custom boards don't have them, but most of the samples assume that it is present.

If that is the case, try adding this line to your prj.conf:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

And see if it makes any difference. This will tell the application to use the internal RC oscillator instead of an external XTAL for the 32kHz clock source. Please let me know if it works or not.

Best regards,

Edvin

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

MagnusPersson — Wed, 29 Jan 2025 14:56:03 GMT

Hi,

I hope some of the Nordic engineers on the forum could shed light on that. I don't know exactly.

Best Regards,

Magnus

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Wed, 29 Jan 2025 13:34:51 GMT

I compiled with NRF Connect 2.8 and the port toggle programm runs
With pure zephyr the hex file size is 95kb
With NRF Connect the hex file size is 233kb

Could you help me to find the reason?
Maybe a there is no startup/boot section included

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

MagnusPersson — Wed, 29 Jan 2025 12:14:50 GMT

Hi,

OK, this I have no experience of. I have used nRF Connect SDK 2.7 and found that this worked for me.

Best Regards,

-Magnus

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Wed, 29 Jan 2025 06:49:10 GMT

Hi Magnus
I used pure Zephyr

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

MagnusPersson — Tue, 28 Jan 2025 15:08:10 GMT

Hello Sir,

Which version of the nRF Connect SDK are you using?

Best Regards,

Magnus

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Mon, 27 Jan 2025 13:11:16 GMT

I also checked west flash option. Same behaviour

RE: NRF54L15 Zephyr Blinky Sample did not start at Power on

Gerd Breidenstein — Mon, 27 Jan 2025 12:25:56 GMT

I used jlink commander for flashing

J-Link>erase
No address range specified, 'Erase Chip' will be executed
'erase': Performing implicit reset & halt of MCU.
Reset type: NORMAL (wiki.segger.com/J-Link_Reset_Strategies)
Reset: ARMv8M core with Security Extension enabled detected. Switch to secure domain.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Erasing device...
J-Link: Flash download: Total time needed: 0.231s (Prepare: 0.080s, Compare: 0.000s, Erase: 0.085s, Program: 0.000s, Verify: 0.000s, Restore: 0.065s)
Erasing done.
J-Link>loadbin zephyr.hex 0x0 reset
'loadbin': Performing implicit reset & halt of MCU.
Reset type: NORMAL (wiki.segger.com/J-Link_Reset_Strategies)
Reset: ARMv8M core with Security Extension enabled detected. Switch to secure domain.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Downloading file [zephyr.hex]...
J-Link: Flash download: Bank 0 @ 0x00000000: Skipped. Contents already match