为精确获得嵌入式实时操作系统线程执行时间信息,本文针对意法半导体STM32嵌入式开发平台,以STM32F407单片机为例,基于STM32CubeMX开发工具生成的FreeRTOS工程对线程执行时间统计测量功能进行完善与软件设计,并对FreeRTOS支持包中的时间状态API接口进行介绍与配置,提出使用单片机硬件定时器实现微秒级高精度线程执行时间测量器的设计。实验测试结果表明,该软件设计方法可移植性强,能够正确输出执行时间信息,适用于对线程执行时间要求较高的嵌入式项目以及STM32系列单片机嵌入式工程设计。

In order to accurately obtain the thread execution time information of embedded real-time operating system,this paper aims at the STMicroelectronics STM32 embedded development platform,takes STM32F407 single-chip microcomputer as an examplebased on the FreeRTOS project generated by STM32CubeMX development tool to improve the thread execution time statistical measurement function and software design,and introduces and configures the time state API interface in the FreeRTOS support package,and proposes the design method of using single-chip microcomputer hardware timer to realize microsecond high-precision thread execution time measurement.The experiment results show that the software design method has high portability and can correctly output the execution time information.It can be used in embedded projects with high thread execution time requirements and STM32 series microcontroller embedded engineering design.