protues仿真，多功能波形发生器，并且频率幅值可调，基于低功耗的89S51单片机为核心，以体积小，采用方便，成本低廉的DA0832作为系统的信号产生模块-Protues simulation, multi-function waveform generator, and the frequency amplitude can be adjusted, based on low power consumption S51 89 single chip microcomputer as the