说明：  本程序针对DSPIC30F4011专用电机控制芯片设计的SPWM控制代码，主要针对一步电机，实现变频，正反转控制。开发环境为MICROCHIP公司的MAPLAB-ICDE开发工具。
(This procedure code for the DSPIC30F4011 dedicated motor control chip design SPWM control, step motor, to achieve frequency conversion, positive and negative Transfer control. Development environment for the the MICROCHIP Company of the MAPLAB-, ICDE development tools.)