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,

在89c51 型 系统上 运用tlc2543芯片 模拟数字电压 实现功能(In 89C51 type system, the TLC2543 chip is used to simulate the digital voltage to realize the function)