Aperiodic timer resident mechanism based on osek embedded real-time operating system

Abstract

The invention discloses a non-periodic timer resident mechanism based on an OSEK embedded real-time operating system. The mechanism associates a hardware clock with a system counter, and associates multiple periodic or non-periodic timers with the counter to form a timer Linked list, optionally bind task or callback function on each timer. In the present invention, when the timer expires, the callback function will be called first, and the time-critical program can be executed efficiently through the callback function without context switching; device and delete it immediately after use. The main advantage of the present invention is that the non-periodic timer resident mechanism adopted combines the callback function and the non-periodic timer, and the non-periodic timer can still be used to realize the system service with an irregular cycle while using the callback function mechanism to perform efficient operations. The efficiency of program operation is improved, and the programming work is simplified.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to an aperiodic timer resident mechanism based on an OSEK embedded real-time operating system. Background technique [0002] In microcontrollers, a real-time operating system is usually used to provide multitasking and resource sharing functions. A real-time operating system (RTOS) refers to an operating system that provides services for real-time tasks that process incoming data for a limited time. . Because real-time systems have very strict restrictions on time, timers are very important as the core of real-time system time management. Therefore, it is very important to design a timer mechanism that is safe, efficient, and meets the system design requirements. [0003] In the existing real-time operating systems such as uCOS, μClinux, SMC-RTOS, and eCOS, the smallest entity scheduled by the timer mechanism is a task, but the scheduling between different tasks will...

AI Technical Summary

Problems solved by technology

[0006] In view of the above, the present invention provides a non-periodic timer resident mechanism based on the OSEK embedded real-time operating system, which can solve the problem that the callback function cannot set the non-periodic timer in the prior art and affects the operating efficiency of timer-related system-level services. technical problem

Images