nrf5340 NET CPU RTC0,RTC1 stop to work

[emag nioj]

Hello, with the new version of the nrf5340 version D in the NET CPU RTC0 stops to work and the RTC0 IRQ is not called 

now for example the counter is stopped at 87 and the compare0 is 147  

the LFCLK results RUNNING

With the previous CHIP version B this was not happening. 

I checked the same problem in different boards

How to solve?  I have the project stopped like the RTC0

Emag

[emag nioj]

Hi Simon, i think the problem is related to the debug. I m a bit confused because the protection by default is creating lot of wasting time.

It's there a simple way to definitely turn off the protection so i can debug the effective behaviour?

In the datasheet i got info not clear and it's a fight with the flash that erases automatically. I the CHIP version B this was not happening.

I have a routine that updates the firmware in APP and in NET now it's a caos it's impossible to know what's happening.

Please is there a documentation simple and clear with effective example about how to disable this feature that erases automatically?

Thank you!

emag

[Simon]

Check out this blog post: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/allowing-debugger-access-to-an-nrf5340 

[emag nioj]

Thank you Simon, the solution in the link it's not easy to implement, i mean i don't know how to actuate it.

BTW I found a workaround running the APP_CPU and waiting the NET_CPU startup.

At startup the NET_CPU sets the same values for UICR, CTRL_APP.APPPROTECT as the CPU_APP

then attaching the NET_CPU it seems to work. It's always a big trouble respect to just attach and debug.

But this let me solve the problem of the firmware update in NET Flash that was not working properly.

About RTC0,RTC1 i tried to stop again RTC0 waiting in _WFI for a GPIOTE event generated from the Accelerometer but i don't know why RTC0 seems not to restart.

So for now i will disable just the interrupt and re-eneabling it at GPIOTE event, i hope this will reduce the power consumption.

Thank you!
Emag