TI中文支持网PWM1A pwm1B 波形动作设置，我发现波形发生动作设置为互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形并未改变，如果波形发生动作设置为非互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形会变为互补波，请问这是为什么？？
我看手册，EPwm1Regs.DBCTL.bit.POLSEL = 2; 语句意思为： 主动高互补（AHC）。 EPWMxB被反相
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 2; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置会输出互补波！
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 2; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 1; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置波形还是互补波！
请问这是为什么？
Green Deng：EPwm1Regs.DBCTL.bit.POLSEL = 2; 这个就是设置的PWMA不翻转，PWMB翻转。
不是很理解你的问题，你觉得波形应该出现什么情况的改变？
PWM1A pwm1B 波形动作设置，我发现波形发生动作设置为互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形并未改变，如果波形发生动作设置为非互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形会变为互补波，请问这是为什么？？
我看手册，EPwm1Regs.DBCTL.bit.POLSEL = 2; 语句意思为： 主动高互补（AHC）。 EPWMxB被反相
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 2; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置会输出互补波！
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 2; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 1; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置波形还是互补波！
请问这是为什么？
user6102121：
回复 Green Deng:
问题解决了，是我对死区寄存器理解错了 ，不好意思
PWM1A pwm1B 波形动作设置，我发现波形发生动作设置为互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形并未改变，如果波形发生动作设置为非互补波时，加入这个语句 EPwm1Regs.DBCTL.bit.POLSEL = 2; 波形会变为互补波，请问这是为什么？？
我看手册，EPwm1Regs.DBCTL.bit.POLSEL = 2; 语句意思为： 主动高互补（AHC）。 EPWMxB被反相
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 2; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置会输出互补波！
EPwm1Regs.AQCTLA.bit.CAU = 1; // Set PWM1A on event A, down count
EPwm1Regs.AQCTLA.bit.CAD = 2; // Clear PWM1A on event A, up count
EPwm1Regs.AQCTLB.bit.CBU = 2; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 1; // Clear PWM1B on event B, down count
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; // enable Dead-band module
EPwm1Regs.DBCTL.bit.POLSEL = 2; //EPWMxB被反相 //DB_ACTV_HI
EPwm1Regs.DBFED = 50; // FED = 25 TBCLKs 0.5us
EPwm1Regs.DBRED = 50; // RED = 25 TBCLKs 0.5us
这样设置波形还是互补波！
请问这是为什么？
Green Deng：
回复 user6102121:
好的，感谢反馈。
