28335中EPWM1A跟EPWM1B输出一样的

设置如下，EPWM2跟EPWM1设置是一样的

EPwm1Regs.AQCTLA.bit.CAU = 2;  

 EPwm1Regs.AQCTLA.bit.ZRO = 0;
 EPwm1Regs.AQCTLA.bit.PRD = 1;  

 EPwm1Regs.AQCTLB.bit.CBU = 1;
 EPwm1Regs.AQCTLB.bit.PRD = 2;
 EPwm1Regs.AQCTLB.bit.ZRO = 0;

其中EPwm1Regs.TBPRD = 15000;占空比赋值：

EPwm1Regs.CMPA.half.CMPA = 4000;
 EPwm1Regs.CMPB = 15000;
 EPwm2Regs.CMPA.half.CMPA = 4000;
 EPwm2Regs.CMPB = 15000;
 EPwm3Regs.CMPA.half.CMPA = 4000;
 EPwm3Regs.CMPB = 15000;

EPWM1A跟EPWM1B输出一样，EPWM2两个不一样，EPWM3两个不一样

如果按照下面赋值：

EPwm1Regs.CMPA.half.CMPA = 15000;
 EPwm1Regs.CMPB = 4000;

EPWM1A跟EPWM1B输出又变成不一样的了

为什么呢？难道是28335坏了吗

mangui zhang：

有输出  应该没有坏   

相关配置请查看

http://www.deyisupport.com/question_answer/microcontrollers/c2000/f/56/t/17365.aspx