原创 DSP 28335 PWM 死区 AB输出反相设置

 /*** Initialize ePWM1 modules ***/
  {
    EPWMPARAMS EPwm1Params;

    /*-- Setup Time-Base (TB) Submodule --*/
    EPwm1Params.TBPRD = 64000;
    EPwm1Params.TBCTL_CTRMODE = 0;
    EPwm1Params.TBCTL_SYNCOSEL = 3;
    EPwm1Params.TBCTL_PHSEN = 0;
    EPwm1Params.TBCTL_PHSDIR = 0;
    EPwm1Params.TBPHS = 0;
    EPwm1Params.TBCTL_HSPCLKDIV = 0;
    EPwm1Params.TBCTL_CLKDIV = 0;

    /*-- Setup Counter_Compare (CC) Submodule --*/
    EPwm1Params.CMPCTL_LOADAMODE = 0;
    EPwm1Params.CMPCTL_LOADBMODE = 0;
    EPwm1Params.CMPA = 32000;
    EPwm1Params.CMPB = 32000;

 /*-- Setup Action-Qualifier (AQ) Submodule --*/
    EPwm1Params.AQCTLA = 36;
    EPwm1Params.AQCTLB = 264;
    EPwm1Params.AQCSFRC_CSFA = 0;
    EPwm1Params.AQCSFRC_CSFB = 0;
    EPwm1Params.AQCSFRC_RLDCSF = 0;

    /*-- Setup Dead-Band Generator (DB) Submodule --*/
    EPwm1Params.DBCTL_OUT_MODE = 3;
    EPwm1Params.DBCTL_IN_MODE = 0;
    EPwm1Params.DBCTL_POLSEL = 1;
    EPwm1Params.DBRED = 900.0;
    EPwm1Params.DBFED = 900.0;

    /*-- Setup Event-Trigger (ET) Submodule --*/
    EPwm1Params.ETSEL_SOCAEN = 0;
    EPwm1Params.ETSEL_SOCASEL = 1;
    EPwm1Params.ETPS_SOCAPRD = 1;
    EPwm1Params.ETSEL_SOCBEN = 0;
    EPwm1Params.ETSEL_SOCBSEL = 1;
    EPwm1Params.ETPS_SOCBPRD = 1;
    EPwm1Params.ETSEL_INTEN = 0;
    EPwm1Params.ETSEL_INTSEL = 1;
    EPwm1Params.ETPS_INTPRD = 1;

 /*-- Setup PWM-Chopper (PC) Submodule --*/
    EPwm1Params.PCCTL_CHPEN = 0;
    EPwm1Params.PCCTL_CHPFREQ = 0;
    EPwm1Params.PCCTL_OSHTWTH = 0;
    EPwm1Params.PCCTL_CHPDUTY = 0;

    /*-- Setup Trip-Zone (TZ) Submodule --*/
    EPwm1Params.TZSEL = 0;
    EPwm1Params.TZCTL_TZA = 3;
    EPwm1Params.TZCTL_TZB = 3;
    EPwm1Params.TZEINT_OST = 0;
    EPwm1Params.TZEINT_CBC = 0;

    /*-- Initial ePWM1 --*/
    config_ePWMRegs(&EPwm1Regs, &EPwm1Params);
  }

主要设置如下：

 /*-- Setup Dead-Band Generator (DB) Submodule --*/
    EPwm1Params.DBCTL_OUT_MODE = 3;
    EPwm1Params.DBCTL_IN_MODE = 0;
    EPwm1Params.DBCTL_POLSEL = 1;
    EPwm1Params.DBRED = 900.0;
    EPwm1Params.DBFED = 900.0;

即：EPwm1Params.DBCTL_POLSEL = 1;