Application stuck after bootloader start with WDT enabled

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Thu, 04 Oct 2018 13:37:40 GMT

It is SDK 13.1, I found a nrf_drv_clock_uninit() call buried in the code. I will try to test it without calling that function

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Thu, 04 Oct 2018 13:09:00 GMT

Are you sure that you are not calling nrf_drv_clock_uninit() , nrf_drv_clock_on_sd_disable() or nrf_drv_clock_lfclk_release() ?

This is SDK 13.1 ??

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Wed, 03 Oct 2018 14:14:53 GMT

After doing what you described I see that I am stuck in the drivers_nrf/hal/nrf_clock.h file at line 356. This is the nrf_clock_lf_is_running function, however I never call this function nor any of the functions that call this one.

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Wed, 03 Oct 2018 13:58:15 GMT

It could be that the code somewhere tries to turn off the LF clock while the WDT is running, and therefore get stuck. But to figure out where in the code you are stuck, connect the debugger, and use “nrfjprog –readregs”. You will then need to take a look at the printed PC value to figure out where in the code you are. Use the PC value together with the .elf file and addr2line to find the file name and line number of where in the code you are. E.g.

addr2line -e filename.elf 0x23680

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Tue, 25 Sep 2018 09:10:08 GMT

One thing I observed is that after the system hangs eventually the WDT triggers and the application boots correctly. I believe this means that the problem exists but the nrf52 is not completely blocked, just the application

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Tue, 25 Sep 2018 09:07:00 GMT

If you have the inductors, then the DC/DC mode is not what is causing the issue. To answer your question; yes, you need to explicitly enable DC/DC mode. Use sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE) to enable it.

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Tue, 25 Sep 2018 09:00:51 GMT

I have both inductors with the same values and assembly as presented in the reference HW guide.

Do I need to explicitly enable the DC/DC mode?

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Tue, 25 Sep 2018 08:54:15 GMT

Are you using DC/DC mode? Does the custom board have the DC/DC components, inductor L2 and L3?

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Thu, 20 Sep 2018 15:51:59 GMT

I tried running a debug session but when compiling with debug and no optimizations I cannot reproduce the problem.

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Thu, 20 Sep 2018 14:10:48 GMT

Have you tried running a debug session to see where you get stuck? It could be that you are running into the error-handler? Please see this post.

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Thu, 20 Sep 2018 11:58:14 GMT

Yes, from the tests I performed if I do not use the WDT in the bootloader I cannot reproduce the problem. If I remove the WDT from the application the problem persists.

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Thu, 20 Sep 2018 11:54:38 GMT

OK, and when you don't start the WDT in the bootloader, the issue disappear ?

RE: Application stuck after bootloader start with WDT enabled

gsalazar — Thu, 20 Sep 2018 11:51:31 GMT

Hi,

I have the behaviour set as NRF_WDT_BEHAVIOUR_PAUSE_SLEEP_HALT and a reload time of 5 minutes.

Increase it to more than 5 minutes, I cannot really move it up due to the application that I have.

Thanks

RE: Application stuck after bootloader start with WDT enabled

Sigurd — Thu, 20 Sep 2018 11:47:37 GMT

Hi,

What WDT configuration are you using ? What behaviour and reload_value have you set?

Have you tried increasing the reload_value ?