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TMS320F280049: 关于ECAP信号二分频异常的问题

Part Number: TMS320F280049

原本系统对ECAP驱动进行了二分频,每产生两次ECAP信号触发一次中断,但是现在却出现了单次CP信号就产生了ECAP中断,导致后续同步出现异常,请问这里是寄存器的配置出现了问题还是其他哪里的问题呢?