3 ms·
Obviously interrupt code can't clobber registers like that, any shared register the ISR needs to share with ordinary code must be saved/restored on entry/exit s
by unwind 6y ago
Obviously interrupt code can't clobber registers like that, any shared register the ISR needs to share with ordinary code must be saved/restored on entry/exit somehow.
- loeg 6y agoI think GP is talking about MMIO or some device register rather than the CPU’s register file.