高精度频率计，我调试过，非常好用，直接用KEIE C开发,欢迎大家指正-precision frequency meter, I tuned, very convenient, direct KEIE C development, we welcome correction

基于CPLD的简易数字频率计设计。可以很好的帮助你学习CPLD的基础，方便你掌握更多 -CPLD-based design of a simple digital frequency meter. Can be a good basis to help you learn CPLD, allowing you to have more