nRF52833 can not enter main loop.

RE: nRF52833 can not enter main loop.

Simon — Thu, 16 Dec 2021 11:18:24 GMT

I'm happy you found a solution. I guess you're using a custom board without an external LF crystal.

You can also use the RC oscillator (CLOCK_CONTROL_NRF_K32SRC_RC), read more about the different options here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52833%2Fclock.html&cp=4_1_0_4_3_1&anchor=concept_xkj_np1_2r

Best regards,

Simon

RE: nRF52833 can not enter main loop.

carfei_w — Tue, 14 Dec 2021 06:32:03 GMT

It was a wrong clock source choice cause this problem, after selected Synthesized from HFCLK <CLOCK_CONTROL_NRF_K32SRC_SYNTH>, the program can run as nomal.

Is any configure should i change to support 32MHZ external system clock? If not, i consider i had fixed this problem.

Thanks.

RE: nRF52833 can not enter main loop.

Simon — Mon, 13 Dec 2021 13:14:15 GMT

Could you try to enabling logging CONFIG_LOG=y in the prj.conf file, open a terminal and see if you get any useful information about why it's failing? If you're debugging you may want to set CONFIG_DEBUG_OPTIMIZATIONS=y.

By the way, if you're starting a new project in NCS, we recommend using nRF Connect for VS Code:

https://www.youtube.com/watch?v=2cv_jjqk5hg&list=PLx_tBuQ_KSqEt7NK-H7Lu78lT2OijwIMl&ab_channel=NordicSemiconductor

https://www.youtube.com/watch?v=ufjv2NaLfN8

Best regards,

Simon