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TMS320F280039C: 关于PWM使能的问题

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Intellectual 320 points
Part Number: TMS320F280039C


你好  我在配置PWM3A/B和PWM7A/B时出现了一个问题，当EPwm7Regs.AQCSFRC.bit.CSFA = 0， EPwm7Regs.AQCSFRC.bit.CSFB=2时 PWM7B也会发波，PWM7B受控于当EPwm7Regs.AQCSFRC.bit.CSFA ，只要EPwm7Regs.AQCSFRC.bit.CSFA = 0 PWM7B就会发波，这个代码实在280049移植过来的    逻辑性肯定是没有问题的   我想问一下原因