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关于tms320f28032的epwm问题

Other Parts Discussed in Thread: TMS320F28032

   您好,我现在想用TMS320F28032的EPWM,用EPWM1A,EPWM2A,EPWM3A分别产生3路波形,这三路波形是频率不同、相位不同而且是同步的,为什么这三路波形频率不同了,而三者之间的相位关系改不了,官网上面提供的都是频率相同的资料,麻烦您们给说一下,能给出一个例子是最好的啊,谢谢