C2000WARE: C2000™ microcontrollers forum

DEEPAK VERMA68

Part Number: C2000WARE

I AM USING A TRIGGER SUBSYSTEM. I AM USING TO EXPERIMENTER KIT 28335. FROM ONE I AM GENERATING 2 PWM PULSES, EPWM1 AND EPWM2. THIS PULSE I AM TAKING THROUGH GPIO-DI (DSP-2)(PIN 32 AND 34), AND THEN ONE IAM CONNECTING TO TRIGGER PIN AND OTHER I AM TAKIN INTO SUB-SYSTEM AND INSIDE CONNECTING IT TO GPIO-DO(DSP-2, PIN 30) ALSO OUTSIDE THE TRIGGERED SUB-SYSTEM I AM CONNECTING THE TRIGGER PULSE TO GPIO-DO(PIN 31).

THE DSP1- PWM PULSES ARE 10 KHZ EACH(EPWM1,2) BUT THE OUTPUT READ AT GPIO-DO(DSP2)(PIN 30,31) ARE LIKE FLUCTUATING BETWEEN 1.5KHZ, 2.5, 3.8 ...HZ.

CAN U IDENTIFY THE MISTAKE DO I NEED TO DO SOME TRIGGER SETTING FOR EXTERNAL TRIGGER THROUGH GPIO?

over 6 years ago

0 DEEPAK VERMA68 over 6 years ago

Intellectual 410 points

0 Hareesh Janakiraman over 6 years ago in reply to DEEPAK VERMA68

TI__Guru* 95315 points

I am unable to understand exactly what your problem is and where you need help. Can you please explain your problem clearly? Attaching your schematics would help as well. Is this based on Simulink?

On a different note, please do not type in ALL CAPS. It makes your post very difficult to read.

0 DEEPAK VERMA68 over 6 years ago in reply to Hareesh Janakiraman

Intellectual 410 points

Dear Hareesh Ji

Yes, this is based on Simulink. As you see from the Simulink blocks, I am reading the PWM(generated from DSP-2, EPWM-1,2) using GPIO of the DSP-1.

Then through this GPIOs i am triggering the subsystem (10kHz) and other pulse i am feeding inside the subsystem(10 kHz), since the input and the trigger pulses are of 10 kHz each and the trigger is set for both rising and falling edge, I should see the GPIO-DO ( inside subsystem), to show me 10 kHz in the scope.

Hope I have explained it. please see the Simulink snapshot above.

0 Hareesh Janakiraman over 6 years ago in reply to DEEPAK VERMA68

TI__Guru* 95315 points

For questions concerning Simulink, please contact Mathworks directly at https://www.mathworks.com/support/contact_us.html. I am closing this post.

0 Brian McKay over 6 years ago in reply to DEEPAK VERMA68

Mastermind 9005 points

Hi Deepak,

I cant tell from the info provided where the issue is.

Please contact MathWorks Tech Support, and provide your model to them for review.

You may also wish to look through the examples we ship, my guess is there could be something in one of them that would be helpful, but I'm not sure which example to point you to.

https://www.mathworks.com/help/supportpkg/texasinstrumentsc2000/examples.html?s_cid=doc_ftr

Cheers,

-Brian

0 DEEPAK VERMA68 over 6 years ago in reply to Brian McKay

Intellectual 410 points

Dear all

Thanx for the support. I figured out the mistake. The thing is that the gpio has to be configured for the external interrupt to read such digital data.

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