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