PWM generation using TMS320F2812
in [DSP]
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From: MSAD on 27 Aug 2005 12:12 Dear all, Is there anybody can help me out on how to generate a programmed PWM signal using F2812DSP board. It has been suggested that I may set-up one of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 KHz. Next, quantize your waveform into 2^14 time slices. Set up the Timer ISR on the DSP to load a duty ratio of 0 or 100 percent depending on the state of the waveform in the next 1.22 us. could anybody help me how to implement the above concept as I am really new to DSP. thanks in advance This message was sent using the Comp.DSP web interface on www.DSPRelated.com
From: TheDoc on 27 Aug 2005 15:02 "MSAD" <mdahidah(a)yahoo.com> wrote in message news:7uWdnZ9-TZ5qDY3eRVn-vg(a)giganews.com... > Dear all, > Is there anybody can help me out on how to generate a programmed PWM > signal using F2812DSP board. It has been suggested that I may set-up one > of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 > KHz. Next, quantize your waveform into 2^14 time slices. Set up the > Timer ISR on the DSP to load a duty ratio of 0 or 100 percent depending on > the state of the waveform in the next 1.22 us. could anybody help me how > to implement the above concept as I am really new to DSP. > > thanks in advance > > > > This message was sent using the Comp.DSP web interface on > www.DSPRelated.com Take a look at the TI doc for the EV manager.. there is a simple explanation for how to generate a pwm output there.. http://focus.ti.com/lit/ug/spru065c/spru065c.pdf
From: MSAD on 27 Aug 2005 22:19 > >"MSAD" <mdahidah(a)yahoo.com> wrote in message >news:7uWdnZ9-TZ5qDY3eRVn-vg(a)giganews.com... >> Dear all, >> Is there anybody can help me out on how to generate a programmed PWM >> signal using F2812DSP board. It has been suggested that I may set-up one >> of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 >> KHz. Next, quantize your waveform into 2^14 time slices. Set up the >> Timer ISR on the DSP to load a duty ratio of 0 or 100 percent depending on >> the state of the waveform in the next 1.22 us. could anybody help me how >> to implement the above concept as I am really new to DSP. >> >> thanks in advance >> >> >> >> This message was sent using the Comp.DSP web interface on >> www.DSPRelated.com > >Take a look at the TI doc for the EV manager.. there is a simple explanation >for how to >generate a pwm output there.. > >http://focus.ti.com/lit/ug/spru065c/spru065c.pdf > > > > Yes, I had that document, however Yet I am unable to figure out how, it would be very much appreciated if you please supply me a simple detailed example on how to generate PWM with F2812. best regards This message was sent using the Comp.DSP web interface on www.DSPRelated.com
From: Brad Griffis on 28 Aug 2005 12:14 "MSAD" <mdahidah(a)yahoo.com> wrote in message news:Z4udneT959WGgozeRVn-3g(a)giganews.com... > > >>"MSAD" <mdahidah(a)yahoo.com> wrote in message >>news:7uWdnZ9-TZ5qDY3eRVn-vg(a)giganews.com... >>> Dear all, >>> Is there anybody can help me out on how to generate a programmed PWM >>> signal using F2812DSP board. It has been suggested that I may set-up > one >>> of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 >>> KHz. Next, quantize your waveform into 2^14 time slices. Set up the >>> Timer ISR on the DSP to load a duty ratio of 0 or 100 percent depending > on >>> the state of the waveform in the next 1.22 us. could anybody help me > how >>> to implement the above concept as I am really new to DSP. >>> >>> thanks in advance >>> >>> >>> >>> This message was sent using the Comp.DSP web interface on >>> www.DSPRelated.com >> >>Take a look at the TI doc for the EV manager.. there is a simple > explanation >>for how to >>generate a pwm output there.. >> >>http://focus.ti.com/lit/ug/spru065c/spru065c.pdf >> >> >> >> > Yes, I had that document, however Yet I am unable to figure out how, it > would be very much appreciated if you please supply me a simple detailed > example on how to generate PWM with F2812. > best regards > > > This message was sent using the Comp.DSP web interface on > www.DSPRelated.com Check these out: F281x C/C++ Header Files and Peripheral Examples http://www-s.ti.com/sc/psheets/sprc097/sprc097.zip There's an example called ev_pwm that turns on all the pwms such that you can observe them on a scope. Brad
From: Tim Wescott on 28 Aug 2005 14:29
MSAD wrote: > Dear all, > Is there anybody can help me out on how to generate a programmed PWM > signal using F2812DSP board. It has been suggested that I may set-up one > of the PWM outputs such that is has a frequency of say 2^14*50 = 819.2 > KHz. Next, quantize your waveform into 2^14 time slices. Set up the > Timer ISR on the DSP to load a duty ratio of 0 or 100 percent depending on > the state of the waveform in the next 1.22 us. could anybody help me how > to implement the above concept as I am really new to DSP. > > thanks in advance > > > > This message was sent using the Comp.DSP web interface on > www.DSPRelated.com (a) This is really the kind of thing that we all just have to struggle through, usually at least once for each new processor. So unless someone happens to have code lying around you need to start struggling. (b) I think the suggestions about using the TI material are good. They usually give a starting point that should get you where you need to go. If you can handle embedded programming at all you can do it starting from the TI material. (c) This is really more an embedded software issue than a DSP one, even if the software happens to be embedded in a DSP chip. comp.embedded may be more helpful (or they may be as silent as us). (d) If you're that desperate perhaps you should offer to pay someone to do it for you. (e) It's bad form to repeat posts like this. (e1) Unless you have reason to believe that you're friends, or unless you know the person on the other end is a pro AND YOU HAVE YOUR CHECKBOOK READY, it is (IMHO) _really_ bad form to repeat posts like this to individual's emails. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |