此程序用于arduino板（nano，其他可适当修改引脚），MCU采集信号发生器的波形，然后再输出同等频率的互补方波，主要用于驱动全桥或半桥逆变电路，可作为电力电子电路驱动信号扫频。
信号发生器采集引脚：D4
输出方波引脚：D9和D10(This program is used for Arduino board(nano,also can be modified for other types).
MCU collect waveform from signal generator,then output two pulses with same frequency,used for full-bridge or half-bridge Inverter,and can change frequency easily by signal generator.)