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TMS320F280049: eCAP的APWM模式路由到EPWM的TZ使之打嗝,最后一个波形不正确

Part Number: TMS320F280049

我利用eCAP的APWM模式路由到EPWM的TZ模块使之在某些条件下打嗝,但是仔细观察打嗝的波形发现,EPWM的A管和B管总是出现最后一个波形延时关断,且这个问题在EPWMA或者B随机出现,且每次打嗝都只出现在有一个管子上,这是为什么?
如图为EPWMxA和EPWMxB打嗝过程中的波形图