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-bit decimal counter, Reg24 latch, Fp frequency divider, Ctrl frequency controller, Disp dynamic display.)