基于AT89C2051单片机的频率计设计

The Design of the Cymometer Based on Processor AT89C2051

本频率计设计以AT89C2 0 5 1为核心 ,应用单片机的算术运算和控制功能并采用串口液晶显示块实时地将所测频率显示出来。使用串口的液晶显示模块 ,节省了单片机的口线和外围器件 ,简化了显示部分的编程控制。使用高效的快速转换算法和用来测量信号多倍周期的分频电路计算信号频率 ,既保证了系统的测频精度 ,又使系统具有较好的实时性。在本设计中实现了频率信号的实时高精度地测量与显示。

In this paper,a cymometer based on processor AT89C2051 is designed.By making full use of singlechips ability to calculate and control,frequency can be displayed instantly on liquid crystal display with serial data transfer.It can economize system port and peripheral equipment,cut short programme in display.It can meet the needs of high accuracy and short measuring time to use efficient and fast conversion arithmetic and frequency division circuit measuring signals multi-cycle to calculate frequency.The frequency can measured and displayed precisely and instantly in the design.