Nrf5340 custom board is not working

[Fabrice@]

Hi All,

I have design my customer board but after production nothing looks to work. i can program  the board through the Nordic board by using debug out. even a simple blinky app is not working i have tried also to send an Ecco through uart and nothing seems to work ,  please attached is my schematic

[ovrebekk]

Hi 

Have you made proper board files for your custom board, so things like LED's, UART etc will be setup on the right pins? 

Have you tried to step through code using the debugger, to see if the code is running at all? 

Best regards
Torbjørn

[Fabrice@]

Hi ovrebekk 

I have set the debugger the code is not running at all but i'm able to flash the board without any error

Regards,

Fabrice

[ovrebekk]

Hi Fabrice

And which board are you building the code for? 

Best regards
Torbjørn

[Fabrice@]

I'm programming my custom board through Nordic board on the interface P19. once step through code using the debugger the code is not running and stopped the this line of code. this code is in cpu_idle.s

/* unlock BASEPRI so wfe gets interrupted by incoming interrupts */
msr BASEPRI, r1

_sleep_if_allowed wfe

msr BASEPRI, r0

[benwefers]

Hi there!

Not sure if it's of any help, but I recently encountered a similar issue on my custom nrf5340 board. My issue ended up simply being the clock config (hence why no error messages or anything). Perhaps try adding the following to your prj.conf.

# clock config
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

[ovrebekk]

Hi 

Good point from Ben. I don't see an external LF crystal in your schematic, so it could be that you simply need to enable the internal LF clock source. 

Regards
Torbjørn

[Fabrice@]

Hi Ben, 

Thanks by adding  these 2 configs lines i'm able to run the blynk code samples 

[Fabrice@]

Hi ovrebekk ,

We have a cystal here ... as mentioned by benwefers adding these 2 lines of config codes i'm able to run the blinky app.