针对步进电机在各领域上越来越广泛的应用,提出了用单片机AT89C51控制运行四相步进电机方法.由于实验室里进行设计,受到场地、仪器和元件等的限制,提出了用Proteus进行仿真的方法.该软件不仅具有其它EDA工具软件的仿真功能,还能仿真单片机及外围器件.它是目前最好的仿真单片机及外围器件的工具,使设计时间大为缩短,学校的资源得以非常好的利用.%The Single Sign On, as one of the implementation scheme of uniform identity authentication, gets more and more attention. The Single Sign On solution described in this article has a positive guiding significance and value to integration and development for the enteiprise permission system.
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