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关于BLDC控制时TMS320F2812 ACTRx寄存器设定问题

Other Parts Discussed in Thread: CONTROLSUITE
在做直流无刷电机控制时,需要根据换相字控制PWM波

PWM波的高低有效性及PWM OFF我是通过ACTRx寄存器控制的
其中一路霍尔传感器捕获中断函数如下所示: 
调试过程中发现,当改变ACTRx寄存器时,两路互补输出的PWM波会有短时同时为高的显现,导致上下桥臂同时导通,
硬件电路报警。
请问大家在做BLDC控制时,换相是如何处理PWM的状态的呢。