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MSP432 通过TIMER_A的CCR0中断产生的SPWM波无法通过低通滤波器产生正确正弦波

我在学习的过程中想通过TIME_A触发CCR0中断改变PWM的占空比以此来达到SPWM波的目的,但是在实现之后将SPWM波通过LC滤波器形成的正弦波频率与计算值不同 若使用同频率 同初值的TIME32 则结果正常 编写都是通过TI提供的库函数编写