📄 example_280xhrpwm_sfo.c
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// truncated during our 15 bit shift above.
// compute the whole value, and then subtract CMPA_reg_val
// shifted LEFT 15 bits:
temp = ((long)DutyFine * EPwm1Regs.TBPRD) ;
temp = temp - ((long)CMPA_reg_val<<15);
// This obtains the MEP count in digits, from
// 0,1, .... MEP_Scalefactor. Once again since this is Q15
// convert to Q0 by shifting:
CMPAHR_reg_val = (temp*MEP_ScaleFactor[1])>>15;
// Now the lower 8 bits contain the MEP count.
// Since the MEP count needs to be in the upper 8 bits of
// the 16 bit CMPAHR register, shift left by 8.
CMPAHR_reg_val = CMPAHR_reg_val << 8;
// Add the offset and rounding
CMPAHR_reg_val += 0x0180;
// Write the values to the registers as one 32-bit or two 16-bits
EPwm1Regs.CMPA.half.CMPA = CMPA_reg_val;
EPwm1Regs.CMPA.half.CMPAHR = CMPAHR_reg_val;
*/
// All the above operations may be condensed into
// the following form:
// EPWM1 calculations
CMPA_reg_val = ((long)DutyFine * EPwm1Regs.TBPRD)>>15;
temp = ((long)DutyFine * EPwm1Regs.TBPRD) ;
temp = temp - ((long)CMPA_reg_val<<15);
CMPAHR_reg_val = (temp*MEP_ScaleFactor[1])>>15;
CMPAHR_reg_val = CMPAHR_reg_val << 8;
CMPAHR_reg_val += 0x0180;
// Example for a 32 bit write to CMPA:CMPAHR
EPwm1Regs.CMPA.all = ((long)CMPA_reg_val)<<16 | CMPAHR_reg_val;
// EPWM2 calculations
CMPA_reg_val = ((long)DutyFine * EPwm2Regs.TBPRD)>>15;
temp = ((long)DutyFine * EPwm2Regs.TBPRD) ;
temp = temp - ((long)CMPA_reg_val<<15);
CMPAHR_reg_val = (temp*MEP_ScaleFactor[2])>>15;
CMPAHR_reg_val = CMPAHR_reg_val << 8;
CMPAHR_reg_val += 0x0180;
// Example as a 16 bit write to CMPA and then a 16-bit write to CMPAHR
EPwm2Regs.CMPA.half.CMPA = CMPA_reg_val;
EPwm2Regs.CMPA.half.CMPAHR = CMPAHR_reg_val;
// EPWM3 calculations
CMPA_reg_val = ((long)DutyFine * EPwm3Regs.TBPRD)>>15;
temp = ((long)DutyFine * EPwm3Regs.TBPRD) ;
temp = temp - ((long)CMPA_reg_val<<15);
CMPAHR_reg_val = (temp*MEP_ScaleFactor[3])>>15;
CMPAHR_reg_val = CMPAHR_reg_val << 8;
CMPAHR_reg_val += 0x0180;
EPwm3Regs.CMPA.half.CMPA = CMPA_reg_val;
EPwm3Regs.CMPA.half.CMPAHR = CMPAHR_reg_val;
// EPWM4 calculations
CMPA_reg_val = ((long)DutyFine * EPwm4Regs.TBPRD)>>15;
temp = ((long)DutyFine * EPwm4Regs.TBPRD) ;
temp = temp - ((long)CMPA_reg_val<<15);
CMPAHR_reg_val = (temp*MEP_ScaleFactor[4])>>15;
CMPAHR_reg_val = CMPAHR_reg_val << 8;
CMPAHR_reg_val += 0x0180;
EPwm4Regs.CMPA.half.CMPA = CMPA_reg_val;
EPwm4Regs.CMPA.half.CMPAHR = CMPAHR_reg_val;
}
else
{
// CMPA_reg_val is calculated as a Q0.
// Since DutyFine is a Q15 number, and the period is Q0
// the product is Q15. So to store as a Q0, we shift right
// 15 bits.
EPwm1Regs.CMPA.half.CMPA = ((long)DutyFine * EPwm1Regs.TBPRD>>15);
EPwm2Regs.CMPA.half.CMPA = ((long)DutyFine * EPwm2Regs.TBPRD)>>15;
EPwm3Regs.CMPA.half.CMPA = ((long)DutyFine * EPwm3Regs.TBPRD)>>15;
EPwm4Regs.CMPA.half.CMPA = ((long)DutyFine * EPwm4Regs.TBPRD)>>15;
}
for (i=0;i<300;i++)
{
// Call the scale factor optimizer lib
SFO_MepEn(1);
SFO_MepEn(2);
SFO_MepEn(3);
SFO_MepEn(4);
}
}
}
}
void HRPWM1_Config(period)
{
// ePWM1 register configuration with HRPWM
// ePWM1A toggle low/high with MEP control on Rising edge
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.TBCTL.bit.FREE_SOFT = 11;
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_SET; // PWM toggle high/low
EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.ZRO = AQ_SET;
EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EALLOW;
EPwm1Regs.HRCNFG.all = 0x0;
EPwm1Regs.HRCNFG.bit.EDGMODE = HR_FEP; //MEP control on falling edge
EPwm1Regs.HRCNFG.bit.CTLMODE = HR_CMP;
EPwm1Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;
EDIS;
}
void HRPWM2_Config(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 = 0;
EPwm2Regs.TBCTR = 0;
EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
EPwm2Regs.TBCTL.bit.PHSEN = TB_DISABLE; // ePWM2 is the Master
EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1;
EPwm2Regs.TBCTL.bit.FREE_SOFT = 11;
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_SET; // PWM toggle high/low
EPwm2Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm2Regs.AQCTLB.bit.ZRO = AQ_SET;
EPwm2Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EALLOW;
EPwm2Regs.HRCNFG.all = 0x0;
EPwm2Regs.HRCNFG.bit.EDGMODE = HR_FEP; //MEP control on falling edge
EPwm2Regs.HRCNFG.bit.CTLMODE = HR_CMP;
EPwm2Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;
EDIS;
}
void HRPWM3_Config(period)
{
// ePWM3 register configuration with HRPWM
// ePWM3A toggle high/low with MEP control on falling edge
EPwm3Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE; // set Immediate load
EPwm3Regs.TBPRD = period-1; // PWM frequency = 1 / period
EPwm3Regs.CMPA.half.CMPA = period / 2; // set duty 50% initially
EPwm3Regs.CMPA.half.CMPAHR = (1 << 8); // initialize HRPWM extension
EPwm3Regs.TBPHS.all = 0;
EPwm3Regs.TBCTR = 0;
EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
EPwm3Regs.TBCTL.bit.PHSEN = TB_DISABLE; // ePWM3 is the Master
EPwm3Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
EPwm3Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm3Regs.TBCTL.bit.CLKDIV = TB_DIV1;
EPwm3Regs.TBCTL.bit.FREE_SOFT = 11;
EPwm3Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm3Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm3Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm3Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm3Regs.AQCTLA.bit.ZRO = AQ_SET; // PWM toggle high/low
EPwm3Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm3Regs.AQCTLB.bit.ZRO = AQ_SET;
EPwm3Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EALLOW;
EPwm3Regs.HRCNFG.all = 0x0;
EPwm3Regs.HRCNFG.bit.EDGMODE = HR_FEP; //MEP control on falling edge
EPwm3Regs.HRCNFG.bit.CTLMODE = HR_CMP;
EPwm3Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;
EDIS;
}
void HRPWM4_Config(period)
{
// ePWM4 register configuration with HRPWM
// ePWM4A toggle high/low with MEP control on falling edge
EPwm4Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE; // set Immediate load
EPwm4Regs.TBPRD = period-1; // PWM frequency = 1 / period
EPwm4Regs.CMPA.half.CMPA = period / 2; // set duty 50% initially
EPwm4Regs.CMPA.half.CMPAHR = (1 << 8); // initialize HRPWM extension
EPwm4Regs.CMPB = period / 2; // set duty 50% initially
EPwm4Regs.TBPHS.all = 0;
EPwm4Regs.TBCTR = 0;
EPwm4Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;
EPwm4Regs.TBCTL.bit.PHSEN = TB_DISABLE; // ePWM4 is the Master
EPwm4Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
EPwm4Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
EPwm4Regs.TBCTL.bit.CLKDIV = TB_DIV1;
EPwm4Regs.TBCTL.bit.FREE_SOFT = 11;
EPwm4Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwm4Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
EPwm4Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
EPwm4Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwm4Regs.AQCTLA.bit.ZRO = AQ_SET; // PWM toggle high/low
EPwm4Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm4Regs.AQCTLB.bit.ZRO = AQ_SET;
EPwm4Regs.AQCTLB.bit.CBU = AQ_CLEAR;
EALLOW;
EPwm4Regs.HRCNFG.all = 0x0;
EPwm4Regs.HRCNFG.bit.EDGMODE = HR_FEP; //MEP control on falling edge
EPwm4Regs.HRCNFG.bit.CTLMODE = HR_CMP;
EPwm4Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO;
EDIS;
}
// No more
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