以前学EDA的时候做过的四个小程序，分别是24/12小时制数字钟、数字频率计、乐曲播放电路、多人智力竞赛抢答器-EDA previously done when the four small procedures are 24/12 hour digital clock, digital frequency meter, circuit music players and many more devices quiz Answer

该数字频率计使用EDA软件QUARTUS II编写，实现以下的3个功能： 1. 测试频率范围为：1Kz~99999999Hz， 2. 基准信号频率为1MHz； 3. 用8位十进制7段数码显示译码器显示所测信号的频率值。 -The digital frequency meter using EDA software QUARTUS II prepared to fulfill the following three functions: 1. Test frequency rang

使用vhdl语言原件例化设计数字频率计，并用6位7段数码管计数。模块包括：十进制计数器，6位10进制计数器，Reg24 锁存器、Fp 分频器、Ctrl 频率控制器、Disp 动态显示。(The digital frequency meter is designed by using VHDL language as an example and counted by 6-bit 7-segment digital tube. Modules include: decimal counter, 6