利用PIC16F877A实现SPWM的输出，本代码主要是为了实现单相你变电源所写的驱动电路的程序，主要用到了PIC16的CCP模块的功能。-The SPWM output with PIC16F877A, the code in order to achieve single-phase variable power drive circuit written procedures, mainly used in the PIC16 the CCP module functions.