Setting watchpoint on nRF52832DK with GDB

[Gordon]

Hi,

I've recently come across a problem where in some cases my device's memory gets trashed.

Ideally I'd be able to set a watchpoint on a memory location so that I could see what the offending code is - and it would appear that the nRF52832 has all the debug hardware needed to do this.

I'm using the latest JLinkGDBServer with the latest GCC/GDB on Linux, but adding a watchpoint with watch causes it to fall back to single-stepping and checking every single instruction - which is so slow that I believe the watchdog resets will kick in.

Am I missing something? Is there some way to enable proper hardware watchpoints?

thanks!

[Håkon Alseth]

Good morning Gordon,

Did you try to use awatch <var> instead of watch <var>? I'd recommend to disable the WDT when debugging, as the debugger will halt the CPU, but not any peripherals in the background. This will cause the WDT to reset your system after the bkpt has reached.

Cheers, Håkon