nrf5340 debug network core?

[skxo]

Hello,

I am working on a little app running on nrf5340 app core. Now I want also to program the network core, to be able to exchange data via shared memory as little demo.

How can I attach the debugger to the network core?

To attach to the app core, I use OpenOCD 0.10.0 , join debugger of course and slighly modified nrf9160.cfg config file.

About this network core, the ID is still 0x6ba02477 ?

My first attempt was to do multi-core debugging but for the moment I only connect to the app core even with multi session ( I can see that because I compare the $PC and for the network core it should be on the 0x01000000 range and it is not...)

nrfjprog tool si able to connect to the network core via --coprocessor parameter but it is too limited for proper debugging session.

hope you can help me

Cheers

sk

[Håkon Alseth]

Hi,

 

The CPU cores are both Cortex M33 on the nRF5340, which is the same core as the nRF9160.

We do not support openocd, and it doesn't seem like the project officially supports neither nRF9160 or nRF5340?

 

The network core is started up from the application core, so you need to first boot up the net core via this register:

https://infocenter.nordicsemi.com/topic/ps_nrf5340/chapters/reset/doc/reset.html?cp=3_0_0_3_7_10_1#register.NETWORK.FORCEOFF

 

If you flash the app core with a simplistic firmware (zephyr/samples/hello_world), it will automatically boot up the net core via this file:

https://github.com/NordicPlayground/fw-nrfconnect-zephyr/blob/master/boards/arm/nrf5340_dk_nrf5340/nrf5340_cpunet_reset.c#L55

 

Kind regards,

Håkon