1, in view of the general embedded chip, only two categories, main and interrupt priority, why the ARM in some chip developed FIQ model?
Through the timer interrupt, 2, and the general operating system, task management, so as to realize more priority tasks, if support FIQ pattern, also can realize the priority task, also can cover a simple embedded application scenario, why didn't get extensive application?

CodePudding user response:

Contrast complex protection do not need to increase