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TMS320F28374S: 变频

Part Number: TMS320F28374S


我在中断改变开关频率,也就是EPwm1Regs.TBPRD是变化,然后配置为 EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO_PRD,在中断中改变占空比,会出现一个异常占空比,100%高电平的占空比,为什么呢?