Exception handler and others in debug - VS code

RE: Exception handler and others in debug - VS code

Håkon Alseth — Fri, 27 Oct 2023 07:56:50 GMT

Hi,

As you've noticed, the kernel will use exception handler, more specifically the PendSV, to change context (threads etc).

More detailed information on this subject can be found here:

https://docs.zephyrproject.org/latest/hardware/arch/arm_cortex_m.html#thread-context-switching

Kind regards,

Håkon

RE: Exception handler and others in debug - VS code

witc — Thu, 26 Oct 2023 20:14:58 GMT

Ah, I've figured it out. First, the Exception Handler doesn't necessarily mean that an error has occurred; it's just handling some ISR. Second, the issue was that I were using while(k_msgq_put(&queuCoreHandle, &sd, K_FOREVER) != 0); in the callback from a software timer as well as in an ISR function. The queue I were sending to was likely full, and the program couldn't proceed further because it was waiting for the queue to become free.