Programs never make it to main()

[MStreet]

I've designed a custom board with the Laird BL5340 module and even the Blinky sample fails to run properly. I get the following debug output no matter what I try:

I've got UART1, I2S (master), and LED6, 7, and 8 connected using the same pins as the NRF5340 Audio DK. The module is powered from 3.3V (both VDD and VDD_HV) and reset is pulled up with a 4.7K resistor. Other than JTAG nothing else is connected and remaining port pins are floating.

I get the same behavior when configured for my custom board or for the nrf5340_audio_dk_nrf5340_cpuapp. I'm using version 2.2.0 of the SDK with a Segger j-link debugger. I've been able to program and run programs, including the BLE Audio samples on the DK. I can also use the j-link with DK, so I don't think it's my basic setup.

Any suggestions would be appreciated!

[Amanda Hsieh]

Hi, 

Do you enable debug options?

Could you try to test with zephyr\samples\hello_world?

Do you have nRF5340DK to test?

Regards,
Amanda H.

[MStreet]

Same result. The log shows that it is stuck in arch_cpu_atomic_idle (), which apparently is a low-power "sleep" state waiting for an interrupt to wake it up. No other threads are spawned and main() is never executed. It doesn't matter whether it's hello_world, blinky, or nrf5340_audio which is the application I'm hoping to use.

[MStreet]

No, I don't have NRF5340DK. But I do have two of the NRF5340 AUDIO DK and they program and work OK.

[Amanda Hsieh]

Hi,

Add this to your project config file:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION=y

I've designed a custom board with the Laird BL5340 module

You also could try to build for bl5340_dvk, there is the board setting https://github.com/nrfconnect/sdk-zephyr/tree/main/boards/arm/bl5340_dvk for it. 

Regards,
Amanda H.

[MStreet]

That works, thank you very much!