Using Graph tool to view PWM outptuts in TMS320F28335

Sunil Sreedhar57

Hi,

I am trying to view the PWM signal outputs of GPIO0 using the Graph tool available in CCSv4 but the graphs are not clear and have random variation unlike the one expected. I feel the problem is with using the graph tool and the values of the parameters set in the graph properties window.

Also what should be the start address value if PWM output is obtained at GPIO0?

Thanks

over 11 years ago

0 Gautam Iyer over 11 years ago

Guru 192875 points

Hi Sunil,

Sunil Sreedhar57 said:
I am trying to view the PWM signal outputs of GPIO0 using the Graph tool available in CCSv4 but the graphs are not clear and have random variation unlike the one expected. I feel the problem is with using the graph tool and the values of the parameters set in the graph properties window.

The graph utility has its own updating rate and processing time which will give you incorrect results if you're checking the pin status. The best solution in your case would be to use a DSO instead.

Regards,

Gautam

0 Sunil Sreedhar57 over 11 years ago in reply to Gautam Iyer

Prodigy 20 points

Thanks Gautam.

Is there any other way to view the PWM signals in CCS using some other tool?

Thanks

0 Gautam Iyer over 11 years ago in reply to Sunil Sreedhar57

Guru 192875 points

Sunil Sreedhar57 said:
Is there any other way to view the PWM signals in CCS using some other tool?

Check Lab 7 in the attached doc:

https://www.ee.iitb.ac.in/~ccgroup/experiment_files/TI

Regards,

Gautam

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Using Graph tool to view PWM outptuts in TMS320F28335