Through today's study, I understand the interrupt system. Interrupt means that when this part of the code is running, there are more urgent programs that need to be run, which is equivalent to the CPU running more important programs.
I don’t know why, I’ve been very sleepy studying these days, and I’m sleepy if I haven’t studied for a long time. I don’t know if it’s because the work consumes too much energy. I think it’s really necessary to adjust my state when I go to work. Too focused, so that I have more energy to study after get off work.