Method for realizing time-sharing task of whole-vehicle controller

Abstract

The invention provides a method for realizing a time-sharing task of a whole-vehicle controller. The whole-vehicle controller comprises a reference clock module, a task scheduling marking module, a task execution module and a task mark removing module, wherein the reference clock module is used for generating and counting a reference clock period and calling the task scheduling marking module; the task scheduling marking module is used for sequentially and evenly hashing each task on a time axis by utilizing the information of the time-sharing task, a reference clock counted value and a specific algorithm, and is used for marking the task scheduling; the task execution module is used for triggering and executing a plurality of tasks by utilizing a task scheduling mark and is used for calling the task mark removing module; and the task mark removing module is used for removing the task scheduling mark according to a task removing mark after the task execution is finished. The method provided by the invention can be used for effectively solving the problems that soft interrupted clock counting is inaccurate, source data are subjected to paroxysmal blocking, and task execution is omitted in front and back frameworks.

Description

technical field [0001] The invention provides a method for realizing task scheduling, and particularly relates to a method for realizing time-sharing tasks for a vehicle controller. Background technique [0002] As the core of power and drive management and coordination of new energy vehicles, the vehicle controller is the key to realizing energy saving and environmental protection; however, the related subsystems involved in the vehicle controller, that is, the control objects are many and complex, and the relationship between each control object is very complicated. The timeliness and reliability of data exchange are extremely high; for this reason, periodic scheduled tasks or interruptions are usually used to collect, exchange, analyze and store data. [0003] However, the scheduling of periodic timed tasks or interrupts usually used is based on the clock cycle, such as figure 1 Indicated; at a certain point in time, multiple tasks will be triggered at the same time, for...

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Problems solved by technology

[0003] However, the scheduling of periodic timing tasks or interrupts that are usually used is based on the clock cycle, such as figure 1 As shown; at a certain point in time, multiple tasks will be triggered simultaneously, such as the task of data exchange with multiple control objects in the MCU of the vehicle controller will occur simultaneously or successively; and because the vehicle controller The calculation speed of the MCU is much faster than the communication or acquisition speed for data exchange, so each control object will receive the request of the vehicle controller at almost the same time and respond, resulting in disordered competition in CAN communication and source-end data array. Many problems such as intermittent blocking have become one of the main factors for the untimely and unreliable data exchange with each control object

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