Software interrupts, Keil MCB1700 evaluation board

Question

I try to develop programs for MCB1700 evaluation board. Is it possible to use software interrupts (SWI) without RTOS RTX?

score 1 · Answer 1 · answered Jan 06 '12 at 22:44

1

Yes, it's just a normal Cotex-M3 processor. You can use any RTOS you want and still be able to use the SWI features of the Cortex.

answered Jan 06 '12 at 22:44

TJD

score 1 · Accepted Answer · answered Jan 07 '12 at 06:37

Yes, except that on a Cortex M3 processor you'll use SVC instead of SWI. You don't need to use an RTOS to use this functionality.

The exception handler will be a little bit different than with SWI because of register stacking on entry to the exception.

Also be aware that unlike SWI, you cannot invoke SVC while running a SVC handler (whereas you could "nest" SWIs)

2 Answers2