TMS320F28379D: TMS320F28379

Hello,

Can I please see what your EPWM configuration is? Specifically the value for EPWMCLK, HSPCLKDIV, CLKDIV, TBPRD, Count Mode (Up, Down, UP & Down). 

Best Regards,

Marlyn

EPWM CLK =200MHZ

Hello,

Thank you for providing the configuration. 

I do want to point out that our max EPWM frequency on this device is 100MHz (this is noted in the datasheet). 

For 50Hz, and if the EPWM frequency is changed to 100MHz (default) the calculations are as follows:

Tpwm = 1/50 = .02

TBCLK = 100MHz/(HSPCLKDIV*CLKDIV) = 100MHz/(4*1) = 25MHz

TTBCLK = 1/25MHz = 40nsec

TBPRD = (Tpwm/TTBCLK) -1 = (.02/40n)-1 = 499999

Therefor, for a 50Hz output I would change EPWMCLK to 100MHz (look at the EPWMCLKDIV bit), CLKDIV to divide by 1, and TBPRD to 499999

Best Regards,

Marlyn

i have applied your changes but the epwm output remains high all time ....