this code shows the duty cycle of a node

步进电机的驱动程序，可以进行频率设置，占空比设置。-Stepper motor driver can set the frequency, duty cycle settings.

这是单片机的程序，89c51，用于测量占空比的相关代码，里面用的不是数码管，是lcd显示屏，- This is a single-chip program, 89c51, for measuring the duty cycle of the relevant code, which is not used in digital control, is lcd display,