CCS/TMS320F28377S: HRPWM with Deadband on both Outputs

Hi Dominik,

Yes, it is possible. The threads you referenced are for older devices which only supported one HR channel. Your device supports both A and B HR channels.

The CMPAHR register is for the A channel output. The CMPBHR register is for the B channel output. They are not related to CMPA and CMPB. In retrospect, they could have been named a bit clearer.

Regards,
Kris

Hello Kris,

thank you for the answer. I can use both with high resolution.

But my problem is, that i want to use the deadband functionality. I like to have the signal EPWMB in HR and EPWMA generated from the deadband (if this isnt possible i also can switch A and B).
In my setup EPWMA is not in HR. Is it possible to configure EPWMA, generate in addiction to the EPWMB with the deadband, in HR?

I doesnt really understand the cooperation of the HR and the deadband. If EPWMB is in HR and EPWMB is the source of EPWMA in the deadband section, why is EPWMA not in HR?

I'm working in up-down counter mode with TBPRD=250 and the EPWMA has steps of 0,4 %.( => normal resolution)

// Deadband
EPwm2Regs.DBCTL.bit.IN_MODE = 3;
EPwm2Regs.DBCTL.bit.OUT_MODE = 3;
EPwm2Regs.DBCTL.bit.POLSEL = 2;
EPwm2Regs.DBCTL.bit.OUTSWAP = 3;
EPwm2Regs.DBRED.bit.DBRED = 15;
EPwm2Regs.DBFED.bit.DBFED = 15;


// HR
EALLOW;
EPwm2Regs.HRCNFG.all =0x0;
EPwm2Regs.HRCNFG.bit.HRLOAD=2;
EPwm2Regs.HRCNFG.bit.AUTOCONV=0;
EPwm2Regs.HRCNFG.bit.EDGMODEB=1;
EPwm2Regs.HRCNFG.bit.CTLMODEB = HR_CMP;
//EPwm2Regs.HRCNFG.bit.EDGMODE=1; // not used actual makes no difference
//EPwm2Regs.HRCNFG.bit.CTLMODE = HR_CMP; // not used actual makes no difference