TI中文支持网我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
rookiecalf：
没看出哪里不对了，低有效互补，输出很好啊
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
user4244115：
回复 rookiecalf:
我加了死区，但是波形不对啊，您可以看一下，黄色是上管，蓝色是下管，死区明显不对啊！
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
rookiecalf：
回复 user4244115:
高电平重合很显眼啊，这就是低电平有效的死区。除非你想要的是高电平有效，那就是你配置电平方式有问题
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
user4244115：
回复 rookiecalf:
加我的QQ吧，563287986，需要您的指导，谢谢
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
user4244115：
回复 rookiecalf:
那我想要一个高电平有效的死区应该怎么设置呢，我真的不知道怎么设置才是正确的设置，希望您能指导一下，谢谢！
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
rookiecalf：
回复 user4244115:
28335为例：
EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC ; //Active high complementary
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
user4244115：
回复 rookiecalf:
您可以看一下我的程序段，我是给了EPwm1Regs.CMPB = 1000;，CMPA为0，我想通过设置让CMPA随着CMPB变化，最终输出互补的PWM，主要的设置为：
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event EPwm1Regs.DBRED = 450; // Enable INT EPwm1Regs.DBFED = 450;
我想得到高电平有效的死区波形，请您看一下我的寄存器哪一位不对，谢谢您的帮助！
我将 EPwm1Regs.CMPB设置为1000，通过寄存器配置想输出一对互补对称且加死区的PWM，但是输出结果总是不对，请大家帮我分析一下哪里出了问题，谢谢！
EPwm1Regs.CMPA.half.CMPA = 0; // Set compare A value
EPwm1Regs.CMPB = 1000;
EPwm1Regs.AQCTLA.bit.CAU = 0x1; // Set PWM1A on event A, up count
EPwm1Regs.AQCTLA.bit.CAD = 0x2; // Clear PWM1A on event A, down count
EPwm1Regs.AQCTLB.bit.CBU = 0x1; // Set PWM1B on event B, up count
EPwm1Regs.AQCTLB.bit.CBD = 0x2;
EPwm1Regs.DBCTL.all = 0x37; // Select INT on Zero event
EPwm1Regs.DBRED = 450; // Enable INT
EPwm1Regs.DBFED = 450;
rookiecalf：
回复 user4244115:
struct DBCTL_BITS { // bits description Uint16 OUT_MODE:2; // 1:0 Dead Band Output Mode Control Uint16 POLSEL:2; // 3:2 Polarity Select Control Uint16 IN_MODE:2; // 5:4 Dead Band Input Select Mode Control Uint16 rsvd1:10; // 15:4 reserved};
POLSEL是电平有效方式的设定，对应你的配置为b'01，那么对应的方式为：
// POLSEL bits#define DB_ACTV_HI 0x0#define DB_ACTV_LOC 0x1#define DB_ACTV_HIC 0x2#define DB_ACTV_LO 0x3
中的DB_ACTV_LOC ，即低电平有效。
将相应为更改为DB_ACTV_HIC 即可。
