TMS570LS1224: EPWM not able to produce

Sachin Babyrajan

Part Number: TMS570LS1224

Tool/software:

I am using a launchpad to generate PWM waveforms.

As of the schematics I can use the Connector J5.19 & J5.20 to see the waveforms.

Here are my configs:

here is my C code on main:

int main(void)
{
/* USER CODE BEGIN (3) */
/* USER CODE END */

etpwmInit();
while(1)
{
}
}

I cannot see any PWMs on J5.19 & J5.20 . Do I need any extra wiring on launch pad?

Am I looking into correct PINS?

0 Sachin Babyrajan over 1 year ago

Here is the pic of the probes:

0 jagadish gundavarapu over 1 year ago in reply to Sachin Babyrajan

Hi Sachin,

You should also need to call the "etpwmStartTBCLK" function after initialization to start the PWM generation.

Please refer below FAQ:

Here i attached the ETPWM example:

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Thanks & regards,
Jagadish.

0 Sachin Babyrajan over 1 year ago in reply to jagadish gundavarapu

Thanks Jagadish,

Now the PWM is generating but they EPWM6A & EPWM6B are not complementary. I expected them to be complementory.

DO you know why? Thank you so much for your help :)

0 jagadish gundavarapu over 1 year ago in reply to Sachin Babyrajan

Hi Sachin,

If you want complementary output, then we should keep them in opposite polarity. Like as below

--
Thanks & regards,
Jagadish.