case about nRF54L15 & GRTC

[peter.min]

Hi,

1.I'm attempting to create a GRTC wake-up example, but it's giving an error when running. Could you please help me troubleshoot this issue?
2. The line that caused the error is as follows:

    uint32_t waketime_cycles = LFCLK_FREQ_HZ / 2;  // 约 0.5s

    nrf_grtc_waketime_set(p_grtc, waketime_cycles);

3. The code is as follows:(ncs v3.1.1 nRF54L15)

1_system_off.zip
4. Log entries are as follows:

Best regards,

Peter.Min

[Vidar Berg]

Hi,

The assert at line 1967 in nrf_grtc.h (https://github.com/zephyrproject-rtos/hal_nordic/blob/7858281d843468fe53c829995fb63f45a227387a/nrfx/hal/nrf_grtc.h#L1967) is raised because you are exceeding the max. value for the WAKETIME register (Note: this register does not define the sleep duration). I recommend you use the z_nrf_grtc_wakeup_prepare() API instead as in our system_off sample here: https://github.com/nrfconnect/sdk-zephyr/blob/716d6a7b2ef73958d914d1f3377a95650689e71f/samples/boards/nordic/system_off/src/main.c#L105. This ensures the GRTC gets configured correctly as a wakeup source for System OFF.

Best regards,

Vidar