CCS/TMS320F28035: PWM Stops even though Free Run is Enabled in TBCTL

Shiv,

If you would like the PWM to continue operation even during a debug halt the only thing you need to do is to set Free,Soft = 11 or 10. The Free,Soft bits can be found in the TBCTL register.

After setting up the PWM please read the TBCTL register of whichever ePWM you are using and provide me the value.

Regards,
Cody 

Shiv,

that looks correct, was that value read AFTER you saw the issue? This is very important because something in your code may be changing that value.

Are you observing ePWM 1, if you happened to be observing ePWM2 it may still stop depending on the value in its TBCTL register.

Regards,
Cody 

Exactly the same valuew before and after the breakpoint. 

EPWM2 is same. Refer the above Image

Regards,

Shiv

Shiv,

that is unexpected, can you send me your .out file? Or at least a .out file from a stripped down version of your code that still shows the error?

Regards,
Cody 

Sorry For late Reply. I started pushing data over serial and plotted them in excel. Since the data I want to Sense was of low frequency. It Didnt cause me any issues. Anyways I would still like to know what is reason for this unusual behavior.

I am running Example: controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.0\HVPM_Sensored.
Can this be related to any debugger or CCS setting?

Regards,

Shiv

Thanks a lot Cody.

Hello Cody,

Is This feature affects Exceution time of the code?
I was toggling a GPIO to understand the ISR Execution. But as soon as I turn on Breakpoint. My execution comes down to milliseconds.

I am running in openloop(LEVEL2) and motor also stops spinning.

Regards,
Shiv

Shiv, 

I'm not sure that I understand your question... but yes breakpoints will slow down your execution speed.

Regards,
Cody