CCS/TMS320F28069: Phase shift

Tool/software: Code Composer Studio

Hi,

I am using Piccolo experimenter kit with F28069 control card. I used HRPWM example from the controlsuite. When I tried to add a phase shift to Epwm2 registers, it didnt work. Can someone please explain.

 EPwm1Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE;    // set Immediate load
    EPwm1Regs.TBPRD = period-1;                  // PWM frequency = 1 / period
    EPwm1Regs.CMPA.half.CMPA = period / 2;       // set duty 50% initially
    EPwm1Regs.CMPA.half.CMPAHR = (1 << 8);       // initialize HRPWM extension
    EPwm1Regs.CMPB = period / 2;                 // set duty 50% initially
    EPwm1Regs.TBPHS.all = 0;
    EPwm1Regs.TBCTR = 0;

    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;      // EPwm1 is the Master
    EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
    EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
    EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;

    EPwm1Regs.AQCTLA.bit.ZRO = AQ_CLEAR;        // PWM toggle low/high
    EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;
    EPwm1Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
    EPwm1Regs.AQCTLB.bit.CBU = AQ_SET;

    EALLOW;
    EPwm1Regs.HRCNFG.all = 0x0;
    EPwm1Regs.HRCNFG.bit.EDGMODE = HR_REP;      // MEP control on Rising edge
    EPwm1Regs.HRCNFG.bit.CTLMODE = HR_CMP;
    EPwm1Regs.HRCNFG.bit.HRLOAD  = HR_CTR_ZERO;
    EDIS;
}

//
// HRPWM2_Config - 
//
void
HRPWM2_Config(Uint16 period)
{
    //
    // ePWM2 register configuration with HRPWM
    // ePWM2A toggle low/high with MEP control on Rising edge
    //
    EPwm2Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE;    // set Immediate load
    EPwm2Regs.TBPRD = period-1;                  // PWM frequency = 1 / period
    EPwm2Regs.CMPA.half.CMPA = period / 2;       // set duty 50% initially
    EPwm1Regs.CMPA.half.CMPAHR = (1 << 8);       // initialize HRPWM extension
    EPwm2Regs.CMPB = period / 2;                 // set duty 50% initially
    EPwm2Regs.TBPHS.all = (period/2)-1;           //180 Phase shift
    EPwm2Regs.TBCTR = 0;

    EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
    EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE;      
    EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;
    EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
    EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
    EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
    EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;

    EPwm2Regs.AQCTLA.bit.ZRO = AQ_CLEAR;         // PWM toggle low/high
    EPwm2Regs.AQCTLA.bit.CAU = AQ_SET;
    EPwm2Regs.AQCTLB.bit.ZRO = AQ_CLEAR;
    EPwm2Regs.AQCTLB.bit.CBU = AQ_SET;

    EALLOW;
    EPwm2Regs.HRCNFG.all = 0x0;
    EPwm2Regs.HRCNFG.bit.EDGMODE = HR_REP;       // MEP control on Rising edge
    EPwm2Regs.HRCNFG.bit.CTLMODE = HR_CMP;
    EPwm2Regs.HRCNFG.bit.HRLOAD  = HR_CTR_ZERO;

    EDIS;
}