NRF Connect v2.0.0 - merging 'alarm' sample with 'peripheral_uart' sample

[NickH]

Hi,

I am attempting to merge two example programs together and have hit an issue with a hard fault when my timer interrupt triggers.

This works fine in the standalone timer example program.

I suspect the issue is that the BLE code also uses the same time timer rtc0 but I can't see where I can change this.

[00:00:20.279,083] <err> mpsl_init: m_assert_handler: MPSL ASSERT: 112, 2181
[00:00:20.279,113] <err> os: hard_fault: ***** HARD FAULT *****
[00:00:20.279,113] <err> os: hard_fault:   Fault escalation (see below)
[00:00:20.279,144] <err> os: hard_fault: ARCH_EXCEPT with reason 3

[00:00:20.279,144] <err> os: esf_dump: r0/a1:  0x00000003  r1/a2:  0x00000002  r2/a3:  0x00000001
[00:00:20.279,174] <err> os: esf_dump: r3/a4:  0x20001ff8 r12/ip:  0x00000000 r14/lr:  0x00013c59
[00:00:20.279,174] <err> os: esf_dump:  xpsr:  0x4100001b
[00:00:20.279,205] <err> os: esf_dump: Faulting instruction address (r15/pc): 0x0002c4f8
[00:00:20.279,235] <err> os: z_fatal_error: >>> ZEPHYR FATAL ERROR 3: Kernel oops on CPU 0
[00:00:20.279,235] <err> os: z_fatal_error: Fault during interrupt handling

[00:00:20.279,266] <err> os: z_fatal_error: Current thread: 0x20002920 (idle)
�*** Booting Zephyr OS build v3.0.99-ncs1  ***tal_error_handler: Resetting system

My combined project prj.conf file contains:

CONFIG_UART_ASYNC_API=y

CONFIG_NRFX_UARTE0=y

CONFIG_SERIAL=y

CONFIG_GPIO=y

CONFIG_COUNTER_RTC0=y

CONFIG_I2C=y

CONFIG_COUNTER=y

thanks...

[Marte Myrvold]

Hi,

RTC0 is used by MSPL and must not be used directly by the application if MPSL is used and initialized. I would recommend using RTC2 instead, as RTC1 is also not available. 

Best regards,

Marte

[NickH]

Thanks for the info - I changed to

CONFIG_COUNTER_RTC2=y

in the prj.conf file, but I still get the MPSL ASSERT when the timer fires.

Am I missing some other steps?

I made the same change to the 'alarm' sample app and that works fine with RTC2.

[Marte Myrvold]

Hi,

You must also change the device in main.c, for example:

#if defined(CONFIG_COUNTER_RTC2)

#define TIMER DT_LABEL(DT_NODELABEL(rtc2))

#endif

Best regards,

Marte