AM263P4: EPWM Duty Cycle Configuration

Hi Basri,

Basri Kaya said:

I want to set Tpwm to 1kHz and found formula about it. I did some calculation based on formula and I figured out my clock frequency is not match with Syscfg valu. My clock frequency set to 25 MHz but real clock frequency is 200 MHz.Therefore, I made all calculation based on 200MHz. How can I control this value? 

TBCLK = EPWMCLK / (HSPCLKDIV * CLKDIV)

Clock Prescaler = HSPCLKDIV * CLKDIV

EPWMCLK = 200MHz

Thus, if you want TBCLK to be 25MHz, you need Clock Prescaler to be 8.

You can set the HSPCLKDIV to 4 and CLKDIV to 2, to achieve this.

You can refer the EPWM Academy for more information on these calculations along with examples.

Basri Kaya said:

2) How can I set %100 duty cycle or can I do that? If I set CMPA to 1, I am gettin %99 duty cycle.

I set CMPA value to 0 in this example,  EXAMPLES_DRIVERS_EPWM_HR_DUTY_CYCLE and got 100% duty cycle.

Let me know if this helps!

Regards,
Akshit