文章主要介绍了使用VHDL实现数字频率计的功能，其中包含了各部件的VHDL语言描述，仿真和大致硬件框图，对于初学EDA者大有帮助。-The article introduces the VHDL realization of the functionality of the digital frequency meter, which contains the hardware block diagram of the various components of the VHDL language descr iption, simulation and approximate, and is a great help for beginners EDA.