利用280023想发出一组如图1所示的频率和占空比相同、相位相差180度的PWMA和PWMB，因此我打算设置AQCTLA动作寄存器在时基计数值为0时，epwmA置高，在时基计数值为CMPA时，epwmA置低；设置AQCTLB动作寄存器在时基计数值为PRD时，epwmB置高，在时基计数值为CMPB时，epwmB置低，但最终却产生了如图2所示频率占空比相同、相位也相同的PWM波，一直没找到其中的原因。
图 1
图 2
Pwm模块寄存器设置有epwm初始化和pwm发波两部分：
初始化配置如下：
EPwm1Regs.TBPRD = p->PERIOD;
EPwm1Regs.TBPHS.all = 0;
EPwm1Regs.TBCTR = 0x0000;
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; //递增递减计数模式
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; //禁止TBPHS加载到TBCTR
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.EPWMSYNCINSEL.all = 0;
EPwm1Regs.EPWMSYNCOUTEN.all = 0;
EPwm1Regs.TBCTL2.bit.OSHTSYNCMODE = 0;
EPwm1Regs.TBCTL.bit.CLKDIV = 0; //时间基准时钟预分频位
EPwm1Regs.TBCTL.bit.HSPCLKDIV = 0; //高速时间基准时钟预分频位
EPwm1Regs.TBCTL.bit.FREE_SOFT = 11;
EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm1Regs.AQCTL.bit.SHDWAQAMODE = 0;
EPwm1Regs.AQCTL.bit.SHDWAQBMODE = 0;
EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;
EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.PRD = AQ_SET;
EPwm1Regs.AQCTLB.bit.CBD = AQ_CLEAR;
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
/*====================================================================*/
EPwm1Regs.CMPA.bit.CMPA = p->CMPRA;
EPwm1Regs.CMPB.bit.CMPB = p->CMPRB;
/*====================================================================*/
EALLOW;
CpuSysRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;
Pwm发波配置如下：
EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;
EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.PRD = AQ_SET;
EPwm1Regs.AQCTLB.bit.CBD = AQ_CLEAR;
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
EPwm1Regs.DBFED.all = 100;
EPwm1Regs.DBRED.all = 100;
EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HI;
EPwm1Regs.AQCSFRC.bit.CSFA = 0;
EPwm1Regs.AQCSFRC.bit.CSFB = 0;
请问是哪里配置错误了？还是忘记配置某个寄存器才产生了图2的pwm波？
