In the SPRUG02 document (TMS320x2833x, 2823x High Resolution Pulse Width Modulator), there is no example for the phase control mode for the HRPWM.
Now, I need use the HRPWM to achieve high precision of phase shift control. I configured the HRPWM relative registers refer to the duty control mode examples.
But high precision phase shifting was not achieved. I am doubt what is the problem?
EPwm1 Registers configuration:
EPwm1Regs.TBPRD = EPWM_TIMER_TBPRD; // Set timer period 801 TBCLKs
EPwm1Regs.TBPHS.half.TBPHS = 0; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
EPwm1Regs.CMPA.half.CMPA = (EPWM_TIMER_TBPRD>>1);
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE;
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;
EPwm1Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;
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.AQCTLA.bit.ZRO = AQ_CLEAR;
EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;
EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;
EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL;
EPwm1Regs.DBRED = DeadBand;
EPwm1Regs.DBFED = DeadBand;
EPwm4 Registers configuration:
EPwm4Regs.TBPRD = EPWM_TIMER_TBPRD;
EPwm4Regs.TBPHS.half.TBPHS = (EPWM_TIMER_TBPRD>>1);
EPwm4Regs.TBPHS.half.TBPHSHR = (1<<8);
EPwm4Regs.TBCTR = 0x0000;
EPwm4Regs.CMPA.half.CMPA = (EPWM_TIMER_TBPRD>>1);
EPwm4Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
EPwm4Regs.TBCTL.bit.PHSEN = TB_ENABLE;
EPwm4Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm4Regs.TBCTL.bit.CLKDIV = TB_DIV1;
EPwm4Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm4Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;
EPwm4Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm4Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm4Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm4Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm4Regs.AQCTLA.bit.ZRO = AQ_SET; // Set PWM1A on event A, up count
EPwm4Regs.AQCTLA.bit.CAU = AQ_CLEAR; // Clear PWM1A on event A, down count
EALLOW;
EPwm4Regs.HRCNFG.all = 0x0;
EPwm4Regs.HRCNFG.bit.EDGMODE = HR_BEP;
EPwm4Regs.HRCNFG.bit.CTLMODE = HR_PHS;
EPwm4Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;
EDIS;
EPwm4Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
EPwm4Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC;
EPwm4Regs.DBCTL.bit.IN_MODE = DBA_ALL;
EPwm4Regs.DBRED = DeadBand;
EPwm4Regs.DBFED = DeadBand;
Phase shift control code:
Width = 0.01 * (float)EPWM_TIMER_TBPRD;
PhaseAng = (float)EPWM_TIMER_TBPRD * 0.5-Width;
PHS_reg_val = (Uint16)PhaseAng;
temp = (long)PhaseAng;
temp = temp - ((long)PHS_reg_val<<15);
PHSHR_reg_val = (temp*MEP_ScaleFactor[4])>>15;
PHSHR_reg_val = PHSHR_reg_val << 8;
PHSHR_reg_val += 0x0180;
EPwm4Regs.TBPHS.all = ((long)PHS_reg_val)<<16 | PHSHR_reg_val;
Thanks for your attention and answers.
