基于stm32f103开发板 测量方波（pwm）的频率 频率范围 （1-50k为佳）(Based on the STM32F103 development board, the frequency (frequency range) of Fang Bo (PWM) is measured (1-50k is better))

采用直接测周期法测量信号频率,最小可测到10HZ，平台为STM32F103(measurement signal ;direct;frequency)

本程序是用STM32F103芯片进行开发的，实现对方波信号的频率测量，并显示在12864液晶屏上(This program is developed with STM32F103 chip, and the frequency measurement of the signal of the other side is realized, and it is displayed on the 12864 LCD screen.)