请教28062 EPWM模块操作的问题

想EPWM3A ，3B分别输出2个不同占空比的pwm波，配置差不多跟文档例子里的一样了 ，但是B口还是出来跟A口一样的波，求助

    EPwm3Regs.TBPRD = 1125;                 // Switch Period Counter
    EPwm3Regs.TBPHS.half.TBPHS = 0;               // Set Phase register to zero       EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;
    EPwm3Regs.TBCTL.bit.PHSEN = TB_ENABLE;        // Phase loading disabled
    EPwm3Regs.TBCTL.bit.PRDLD = TB_SHADOW;
    EPwm3Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;//

   EPwm3Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;      // TBCLK = SYSCLK
    EPwm3Regs.TBCTL.bit.CLKDIV = TB_DIV1;
    EPwm3Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm3Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm3Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; // load on CTR = Zero or PRD
    EPwm3Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; // load on CTR = Zero or PRD
    EPwm3Regs.AQCTLA.bit.CAU = AQ_SET;            // CNT = CMP up   ->1
    EPwm3Regs.AQCTLA.bit.CAD = AQ_CLEAR;          // CNT = CMP down ->0
    EPwm3Regs.AQCTLB.bit.CAU = AQ_SET;          // CNT = CMP up   ->0
    EPwm3Regs.AQCTLB.bit.CAD = AQ_CLEAR;             // CNT = CMP down ->1

 EPwm3Regs.CMPA.half.CMPA =500; 
 EPwm3Regs.CMPB= 200;

li li21：

回复 Hank Zhao:

多谢，应该是这个原因