MIcrocontroller, data processing system and task switching control method

Abstract

A microcontroller provided with a processor, a task management table, and a scheduler. The processor sequentially executes a plurality of tasks for controlling the assigned hardware drivers (cores). The task management table stores task management information, including state information indicating the execution status of multiple tasks, priority information indicating the execution priority of the multiple tasks, and core ID information indicating which cores the multiple tasks are assigned to . When a specific instruction is decoded or the execution of any core ends, the scheduler makes the processor perform task switching according to the task management information.

Description

technical field [0001] The present invention relates to a microcontroller with multi-task function, a data processing system composed of the microcontroller controlling a plurality of hardware drivers, and a task switching control method. Background technique [0002] Microcontrollers with multitasking capabilities are known to us. A single processor housed within this microcontroller executes multiple tasks sequentially. For this reason, the task timer periodically sends out a timer interrupt signal requiring task switching. Every time the processor receives the timer interrupt signal, an interrupt handler in the operating system (OS) is activated, so that the interrupt handler performs task scheduling and resource saving and recovery. [0003] In the above-mentioned conventional microcontrollers, since task scheduling is performed in the interrupt processing routine, there is a problem that the overhead at the time of task switching is large, and the operating efficiency...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned conventional microcontrollers, since task scheduling is performed in the interrupt processing program, there is a problem that the overhead at the time of task switching is large, and the working efficiency of the microcontroller is substantially reduced.

This problem is particularly serious in real-time-critical applications such as image data encoding

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