Unable to flash nRF5340-PDK net core

[tpackard]

Hi,

I'm trying to flash my network kernel code to the nRF5340-PDK network core over JTAG. It's a custom research OS called Tock that you can look at here. The code is fairly simple and only attempts to turn on an LED, but it does not appear to run properly. The code that I am attempting to flash to the network core can be found here.

I'm flashing the network kernel to address 0x1000000, I have made sure to enable the network core and assign the GPIO pins I'm using to the network core from the application core, and the application core runs fine. Any ideas as to what I should look into next?

Thanks

[Jørgen Holmefjord]

Hi,

What are you using for flashing the applications? Have you read back the flash to make sure that the code is flashed successfully to the network core?

Do you have any logging enabled that could give any clues what is happening? 

Can you provide hex-files that we can use to test?

Best regards,
Jørgen

[tpackard]

Hi Jørgen,

Thanks so much for verifying that you have the same behavior. I don't get any errors when loading the file with JLinkExe. Given that it seems to flash properly, could it be that I'm not setting up the net core properly? Currently I enable the net core and allocate the LED4 gpio pin to the network core from within the app core. Is there anything else I need to do in order to allow the net core to turn on LED4?

Thanks