TMS320F28379D: How to generate PWM of 70Hz with varying Duty cylcle after perticular time.

Kailas Puri

Intellectual 330 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE

I want to generate PWM of 70Hz using gpio0.

My question is how to generate pwm with varying duty cycle for perticular time.

Minimum on time for pwm, i want to set 1100us and it could vary till 1900us within user defined time period.

over 6 years ago

0 Gautam Iyer over 6 years ago

Guru 192875 points

HI Kailas,

Have you referred to ePWM example code from C2000ware for your device?

Regards,
Gautam

0 Cody Watkins over 6 years ago

TI__Mastermind 42195 points

Kailas,

There are some examples in C2000Ware. While i assume the frequency and duty cycle variation are probably the wrong numbers you should be able to adapt ePWM_ex2_UpDown_AQ.

The example can be found in C200Ware in the following path.

"<Install directory>\c2000\C2000Ware_1_00_05_00\driverlib\f2837xd\examples\cpu1\epwm\epwm_ex2_updown_aq.c"

Regards,
Cody

0 Kailas Puri over 6 years ago in reply to Gautam Iyer

Intellectual 330 points

yes i tried but i am not able to understand .
There is no option to vary duty cycle within perticular time period.

0 Kailas Puri over 6 years ago in reply to Cody Watkins

Intellectual 330 points

okay i will try this program.

0 Cody Watkins over 6 years ago in reply to Kailas Puri

TI__Mastermind 42195 points

Great, for more information I would recommend that you read the Action Qualifier section of the of the Technical Reference Manual.

Feel free to start another thread if you have other questions.

Regards,

Cody

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TMS320F28379D: How to generate PWM of 70Hz with varying Duty cylcle after perticular time.