用AT89S51单片机的T0、T1的定时计数器功能，来完成对输入的信号进行频率计数，计数的频率结果通过8位动态数码管显示出来。要求能够对0－250KHZ的信号频率进行准确计数，计数误差不超过±1HZ。-A single chip with AT89S51 T0, T1 timing counter function, to complete the input signal frequency counting, counting the frequency of 8 resulted in t

用VHDL编程实现在数码管上动态显示时间 功能有整点报时 自动设置时间-VHDL programming in the dynamic display of the time function of the whole point of time is automatically set time on digital tube