Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

RE: Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

Susheel Nuguru — Tue, 06 Jul 2021 12:20:34 GMT

The faulting address 0x0001d396 from the Zephyr.map file you provided seems to be from mpsl_low_prio_irq_handler(which you already know) and looking into the code for this function does not seem to be doing much other than just signaling by giving the semaphore.

static void mpsl_low_prio_irq_handler(void)
{
	k_sem_give(&sem_signal);
}

Could be a stack overflow aswell. Have you enabled any thread stack related helper features like HW_STACK_PROTECTION and CONFIG_STACK_SENTINEL?

RE: Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

rhackl — Thu, 01 Jul 2021 21:41:05 GMT

Looking at the NordicDK vs Controller board oscillators, There isn’t a tolerance difference.

32MHz osc’s both have +/-10ppm tolerance
32.768kHz osc’s both have +/-20ppm tolerance
There are differences in the RLC model but that should not make a difference in this.

Our Oscillator’s MPN:

32MHz: ABM12W-32.0000MHZ-4-D1X-T3 https://abracon.com/Resonators/ABM12W.pdf
32.768kHz: ABS05-32.768KHZ-T https://abracon.com/Resonators/ABS05.pdf

RE: Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

Susheel Nuguru — Thu, 01 Jul 2021 05:54:23 GMT

What clock sources(HFCLK/LFCLK) do you have on your custom board? Seems like their accuracy is different than the one we have on the DK.

RE: Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

rhackl — Wed, 30 Jun 2021 12:28:29 GMT

devzone.nordicsemi.com/.../zephyr.map

Thank you for your quick reply. The map file is attached. The fault appears to occur in mpsl_init.c:

0x0001d394 0x50 modules/nrf/subsys/mpsl/lib..__nrf__subsys__mpsl.a(mpsl_init.c.obj)
.text.mpsl_low_prio_irq_handler

RE: Running the zephyr/samples/bluetooth/peripheral sample program on a custom board results in Hard Faults.

Susheel Nuguru — Wed, 30 Jun 2021 11:36:28 GMT

It gives you a faulting instruction address at 0x0001d396. Could you please check in the map file what function is there? It might give more context on the hardfault.