本程序用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。可对0－250KHZ的信号频率进行准确计数，计数误差不超过±1HZ。-AT89S51 microcontroller T0, T1 timing counter function of this program, to complete the input signal frequency count, count the frequency of the results of eight dynamic digital tube display.0-to 250KHZ the signal frequency for accurate counting, counting error does not exceed ± 1HZ.