Dear All:
I need to configure hrpwm for hi-res duty and period and phase shift control in up count mode. EPWM1A is the master, EPWM2A is the slave shift 120°,
EPWM3A is the slave shift 240°. I am using F28035.
Is it possible to configure HRPWM for all these 3 parts duty, period and phase shift?
According to https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/189224, My code :
// Disable TBCLKSYNC EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; EDIS; //Write To CMP, TBPRD, TBPHS registers. (*ePWM[j]).TBCTL.bit.PRDLD = TB_SHADOW; // set Shadow load (*ePWM[j]).TBPRD = period; // PWM frequency = 1/(2*TBPRD) (*ePWM[j]).CMPA.half.CMPA = period / 2; // set duty 50% initially (*ePWM[j]).CMPA.half.CMPAHR = (0 << 8); // initialize HRPWM extension (*ePWM[j]).TBPHS.all = 0; //Configure modes, clock dividers and action qualifier (*ePWM[j]).TBCTR = 0; (*ePWM[j]).TBCTL.bit.CTRMODE = TB_COUNT_UP; // Select up-down count mode (*ePWM[j]).TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; (*ePWM[j]).TBCTL.bit.HSPCLKDIV = TB_DIV1; (*ePWM[j]).TBCTL.bit.CLKDIV = TB_DIV1; // TBCLK = SYSCLKOUT (*ePWM[j]).TBCTL.bit.FREE_SOFT = 00; (*ePWM[j]).CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; // LOAD CMPA on CTR = 0 (*ePWM[j]).CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; (*ePWM[j]).CMPCTL.bit.SHDWAMODE = CC_SHADOW; (*ePWM[j]).CMPCTL.bit.SHDWBMODE = CC_SHADOW; (*ePWM[j]).AQCTLA.bit.CAU = AQ_SET; (*ePWM[j]).AQCTLA.bit.PRD = AQ_CLEAR; //Configure HRPWM registers EALLOW; (*ePWM[j]).HRCNFG.all = 0x0; (*ePWM[j]).HRCNFG.bit.EDGMODE = HR_BEP; // MEP control on both edges (*ePWM[j]).HRCNFG.bit.CTLMODE = HR_CMP; // CMPAHR and TBPRDHR HR control (*ePWM[j]).HRCNFG.bit.HRLOAD = HR_CTR_ZERO_PRD; // load on CTR = 0 and CTR = TBPRD (*ePWM[j]).HRCNFG.bit.AUTOCONV = 1; // Enable autoconversion (*ePWM[j]).HRPCTL.bit.HRPE = 1; // Turn on high-resolution period control //set TBCTL[PHSEN] = 1 (*ePWM[j]).TBCTL.bit.PHSEN = 1; //set HRPCTL[TBPHSHRLOADE] = 1 (*ePWM[j]).HRPCTL.bit.TBPHSHRLOADE = 1; //Do the same to all other PWM modules except the TBPHS… //Enable TBCLKSYNC SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; //Perform a software sync EPwm1Regs.TBCTL.bit.SWFSYNC = 1; I do not know if all three parts work well. Am I wrong? Please let me know.
