Visual 2010中VB调用串口控件，实现与DSP的串口通信，获取下位机(DSP)控制的三相异步电机各项参数，同时控制异步电机。-Visual 2010 in VB calling Serial control, implementation and DSP serial communication, get the next bit machine (DSP) three-phase asynchronous motor control parameters, while controll