Interrupt Control Method Based on Priority Sorting of Multiple Interrupt Sources

Abstract

The invention discloses an interruption control method based on multiple interrupt source priority ordering. The method comprises the following steps: S1, all interrupt sources are classified according to significance bits, interrupt types, interrupt priority levels and interrupt source sequence numbers, so as to form a plurality of arrangement units; S2, all the arrangement units are sequentially arranged according to the high-to-low sequence of the priority levels, so as to form an interrupt priority queue; S3, in case of an interrupt request, corresponding interrupt sources response sequentially according to the sequence of the interrupt priority queue. The method provided by the invention can achieve interruption control on a plurality of interrupt sources, and has the characteristics of fast speed and low power consumption.

Description

technical field [0001] The present application relates to the technical field of interrupt control, in particular to an interrupt control method based on prioritization of multiple interrupt sources. Background technique [0002] The interrupt controller generally includes several interrupt sources. The so-called interrupt means that when the CPU is running the program normally, the CPU temporarily suspends the running program due to internal and external events, and then executes the service of the internal and external events that request the CPU to temporarily suspend. The program returns to the suspended program after the service program finishes processing. The interrupt sources that can send interrupt requests to the CPU are called "interrupt sources". [0003] Many current interrupt controllers, some have fixed priority, such as arranging priorities according to the order of fixed interrupt source numbers (hardware connections), such interrupt controllers will bring ...

AI Technical Summary

Problems solved by technology

[0003] Many current interrupt controllers, some have fixed priority, such as arranging priorities according to the order of fixed interrupt source numbers (hardware connections), such interrupt controllers will bring many restrictions when the system is applied, and cannot Sort all interrupt sources according to arbitrary priority

There are also some interrupt controllers that can set all interrupt sources to any priority by software, but every time an interrupt request occurs, all interrupt priorities will be compared to determine the current priority. The highest interrupt source to respond, and all these priority comparison logic will be active every time an interrupt request occurs, which will result in greater power consumption and greater delay

Images