单片机控制超声波模块发射超声波，要注意超声波的频率，用定时器实现超声波的频率-a program about single chip microcontroller controll ultrasonicwave module

贡献一个用STM32开发的超声波测距程序，经过自己测试，可以测量8CM到5M的距离范围-Contribution to the development of an ultrasonic distance measurement with the STM32 procedure, after their tests can measure the distance range 8CM to 5M

基于stm32的超声波测距模块的源码,包含初始化以及测距函数-Based on the stm32 ultrasonic ranging module source code

超声波模块驱动程序 （基于stm32）(Ultrasonic module driver)