本设计以AT89C52为核心,充分利用AT89C52的三个定时/计时器,采用测量N个周期信号波形的算法.实现了频率,周期高精度的测量.-AT89C52 to the design at the core, and make full use of the three regular AT89C52 / timer, Measure N cycle signal waveform algorithms. achieve a frequency, high-precision measurement cycle.