Calling soft-device methods from UART/UARTE interrupt handler

RE: Calling soft-device methods from UART/UARTE interrupt handler

Boaz — Tue, 24 May 2016 05:23:09 GMT

While I agree to the principal, most of Nordic's examples do interact with the soft device in IRQ context. I guess it depends on what a 'minimal amount of work' is. The scheduler suggested by James looks promising.

RE: Calling soft-device methods from UART/UARTE interrupt handler

SRA — Mon, 23 May 2016 16:52:49 GMT

You're right of course, but I can think of no reason you'd ever "want" to do this. Interupts are to be jumped to a minimal amount of work done, and get back to code. I'd NEVER call something like start/stop/connect from an ISR. That's just asking for trouble. Flag or signal/mail and do it somewhere else.

RE: Calling soft-device methods from UART/UARTE interrupt handler

RK — Mon, 23 May 2016 15:59:38 GMT

It's fine to call them from the interrupt as long as the interrupt runs at lower priority (ie a higher number) than the SVC call. So you can call the sd_* functions directly if you are running at priority 6 or 7 (the two APP LOW priorities) but not from 2 or 3 (the APP HIGH ones) as they are higher than the SVC call.

RE: Calling soft-device methods from UART/UARTE interrupt handler

James Yu — Mon, 23 May 2016 15:31:13 GMT

You can use the scheduler library to transfer execution to the main context: infocenter.nordicsemi.com/index.jsp