nRF54L15 DK examples fail to build

RE: nRF54L15 DK examples fail to build

Menon — Mon, 30 Jun 2025 08:01:12 GMT

Hello,

I think you can refer to the SPI lesson from the Academy course. It provides a minimal SPI buffer exchange example using the Zephyr SPI API. You can also find the same sample here.

Kind regards,
Abhijith

RE: nRF54L15 DK examples fail to build

lCannon — Tue, 24 Jun 2025 16:20:17 GMT

I was digging into the driver examples: v3.0.2\zephyr\tests\drivers\spi\spi_loopback. I was also trying out nrfx_spim non-blocking example and others. When I filter examples using the VS code extension for the nRF54L15 DK, only one SPI example is present, the SPI Flash Sample. It does work but it obscures the SPI driver with a flash driver so is not really an example of opening a SPI port and exchanging buffers. I am asking if you know of a good example that has the required overlay change and C code where it, opens the SPI port and exchanges some buffers over SPI using either Zephyr SPI interface or Nordics driver directly. The examples that worked NRF52 just don't work.

Thank you

RE: nRF54L15 DK examples fail to build

Menon — Tue, 24 Jun 2025 15:21:46 GMT

Hello,

Which loopback sample are you referring to here?

Kind regards,
Abhijith

RE: nRF54L15 DK examples fail to build

lCannon — Mon, 23 Jun 2025 21:24:10 GMT

The system_off example does build and demonstrate power saving modes. Thank you. Is there an example to for using the SPI as a master with DMA? Open the device and transfer buffers with a client SPI device? The loop back example does not compile for the nRF54L15.

RE: nRF54L15 DK examples fail to build

Menon — Wed, 18 Jun 2025 14:15:21 GMT

Hello,

I understand the issue you've described. This sample assumes that a compatible counter device is available in the device tree, which is not the case for the nRF54L15.

If you check the sample.yaml file for the Counter Alarm sample, you'll notice that the nRF54L15 is not listed. Unlike previous Nordic chips, the traditional RTC0 peripheral is not exposed as "rtc0" on the nRF54L15, and the nrfx_rtc driver is not used with this device.

Instead, the nRF54L15 introduces a new peripheral called the Global Real-Time Counter (GRTC). This serves as a high-resolution, ultra-low-power system timer that's available in all power modes, including System OFF. You can find more details in the product specification under GRTC Driver and GRTC HAL.

Also, refer to this old DevZone thread.

Kind regards,
Abhijith