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c51-cymometer's Introduction

C51 cymometer

嵌入式实验 学号尾号23

C51单片机方波频率计,测量范围1hz-晶振允许的范围(24分之晶振周期)

  • 三个档位:
    • 中频和高频档位测量原理相同,门限时间内计算下降沿个数
    • 低频原理,门限下降沿个数内计算时间
  • 门限:1、2、5、10
  • 串口输出频率
  • lcd1602屏幕输出频率、模式、门限
  • k1、k2按键手动切换模式、门限
  • 自动量程模式,k3按键切换是否打开(上电默认关闭)
  • k4按键强制刷新lcd屏幕显示

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