Stuck in NVMC_wait()

[SpencerEtn]

Hello,

I'm using Segger with the nrf Connect SDK v1.5.1. Before my program's main even calls, the program is getting stuck in the nrf system calls; specifically nvmc_wait() located in system_nrf52.c I've tried on both hardware (BL653) and simulator and both get stuck at the same spot.

Any help would be appreciated, thanks!

[Susheel Nuguru]

That is strange. what was the previous flash operation that is unable to finish?

[SpencerEtn]

I've found a couple things;

For Simulator:

The call stack starts at __start() and after this:

#if defined(CONFIG_PLATFORM_SPECIFIC_INIT)
bl z_platform_init
#endif

The program branches and becomes stuck after void SystemInit() is called and subsequently void nvmc_wait().

For BL653:

The program actually gets stuck at a different point. It's stuck at arch_cpu_atomic_idle() in cpu_idle.S. 

It goes to that from the lfclk_spinwait() function in clock_control_nrf.c  after this code block.

I thought the reason it might not be working on the BL653 board but working on NRF52833 boards would be because the clock is different, so I changed the configuration around but it is still getting stuck. 

[Susheel Nuguru]

It pretty much seems like the startup file clock triggers is not able to start the clock on the BL653, so seems to end up waiting into idle until it starts.

[SpencerEtn]

Any ideas on where/what I should change to try fix this?

I've looked in the sdk_config.h, clock controls, nrfx_config, and now autoconf.h

[SpencerEtn]

I got it working after changing the clock config defines in autoconf.h and adding another flag.