Timer and its implementing method

Abstract

The invention provides a timer and an implement method that is used for a multi-task system. The timer comprises a setup unit, a timing unit, a counting unit and an execution unit. The setup unit is used for setting up the timing time and the time zero of multiple tasks. The timing unit is used for setting up a timing cycle according to the timing time of the multiple tasks. The counting unit is used for setting up maximum timing count based on the timing time and the timing cycle of the multiple tasks; counts numbers according to the time zero and sends out the information of task execution at the end of timing time. The execution unit is used for receiving the information of the task execution and executing the task corresponding to the task execution information by a preset method according to the task execution information. In the invention, only a timer can perform reasonable and orderly management for the multiple masks in the system, thus reducing system resource occupied by the timer, improving system execution efficiency and decreasing difficulty in testing and maintaining the timer.

Description

technical field [0001] The present invention mainly relates to the field of computers, in particular to a timer and its realization method. Background technique [0002] Timers, as an important part of computer systems, are widely used. Through the timing operation of the timer, the computer system can perform each task accurately and methodically. [0003] The timer mainly includes two parts: a timing unit and a counting unit. [0004] For the timing unit, it generally includes a timing unit with 8 digits, 16 digits or 32 digits. The designer selects the timing unit with corresponding digits according to actual needs, and sets the duration of the timing unit, that is, the timing period T. The timing cycle T is determined by the crystal oscillator frequency of the microcontroller (MCU, Micro Control Unit) in the computer system as the machine cycle of the cumulative instruction in the computer system. Many existing microcontrollers such as single-chip microcomputers have p...

AI Technical Summary

Problems solved by technology

Due to the use of multiple timers, this kind of computer system not only takes up large system resources, but also has relatively low execution efficiency. In addition, it increases the difficulty of testing and maintenance of timers.

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