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HRPWM example question

CHIYOON Kim
Prodigy 30 points

I am analyzing the hrpwm_ex1_duty_sfo example code.

CMPAHR = (fraction(PWMduty * PWMperiod) * MEP Scale Factor + 0.5)<<8)
know as

When Auto-conversion Mode is enabled
Known as CMPAHR = fraction(PWMduty*PWMperiod)<<8.

So if I want to pay 40.5 duty

int(PWMDuty*PWMPeriod) to CMPA register
CMPAHR register is frac(PWMDuty*PWMPeriod)<<8

I think you should put it in.

However, in the example

float32_t count = (dutyFine * (float32_t)(EPWM_TIMER_TBPRD << 8))/100;
uint32_t compCount = (count);
HRPWM_setCounterCompareValue(ePWM[i], HRPWM_COUNTER_COMPARE_A, compCount);

float32_t count = (dutyFine * (float32_t)(EPWM_TIMER_TBPRD << 8))/100;

I don't understand this equation. I think I just need to put in the decimal value of the duty, but I don't understand how to adjust the duty with the same code.