Dual core debugging with NXP LPC43xx using Keil IDE

Question

I am using the NXP LPC4357 which has an M4 and M0 core, more specifically I'm using the Keil MCB4300 development board. I have a demo application running on it, I am able to build it and run it on both cores. The problem I have is not being able to hit breakpoints on the M0 core. I am able to do it just fine on the M4 core, but code I know is being executed on the M0 core never triggers a breakpoint. I have read here: https://host.lpcware.com/zh-hans/node/1105959 that in the debug settings on the M0 core "Reset after Connect" should be disabled. I tried that, but it didn't work for me.

Here are my project settings:

M4 core:

M0 core:

Answer 1

You need to select the JTAG of M0 adress on the second M0 project debugging options.

That means you should select 0BXXXXX on the last picture (4BXXXXX is the M4).