能够产生spwm波形，很好用的程序，实现了三相spwm博得生成，值得初学者借鉴-Can produce spwm waveform, good use of procedures, the three-phase generated spwm win, it is worth drawing for beginners

介绍了基于TMS320F240 DSP的变频调速系统与PC机的串行通信设计方法,阐述了Win- dows 98环境下的多线程通信编程技术,并给出了VC++6.0、DSP汇编语言编写的主要程序段代码. -Introduced based on the variable speed system TMS320F240 DSP Serial communication with the PC design method described under Win-dows 98 multi-thr