Debugging direct test mode on nrf53.

[Jordan Archer]

I'm trying to run your direct test mode code on the nrf53.  And verify that the uart pins are working correctly.

What is the best way to debug and verify this?

gdb  seems to fault at the first "si".  So I can't even step to look at the peripheral settings.

Is there a way to do this?  And what is the best way?

I'm using a jlink ultra+.  On a custom board design, which has a different uart pinout than your sample.  I'm using the 1.5.0 sdk.  

[Marjeris Romero]

Hi,

We are aware of this issue and are looking into it.

Best regards,

Marjeris

[Jordan Archer]

Any update on this?

[Marjeris Romero]

Hi,

I should have explained a bit better. There is a known issue when trying to debug the network core in gdb due to the debugger not resetting the network core properly, so I suspect this is the reason you are not able to debug the DTM example.

A fix should be coming in a future release of the nrfjprog tool, but it's difficult for me to give you a time estimate. Please just look out for future updates.

Best regards,

Marjeris

[Jordan Archer]

Just to have me guess.  If I add a debug brk instruction early on in the network MCU, I might catch it once the application MCU starts the network MCU. 

Just an FYI, I've gotten beyond this, by code/dts inspection.