基于MPU+CPLD数字频率计的量程扩展设计与实现

Development of Expanding Scale Based on the MPU+CPLD Structure of Digital Cymometer

文章以MPU+CPLD构架数字频率计的硬件系统,通过对频率测量方法的分析,引出频率计量程扩展基本思路,介绍了用VHDL语言来实现高低频量程自适应测量的方法。设计同时简化了电路的硬件结构,提高了电路的稳定性。

In this paper, a digital cymometer made up of MPU ＋ CPLD was introduced. And the method of expanding range by means of VHDL was given. At the same time, the hardware structure of design was simplified and the stability of the circuit was improved.