How can I show PWM signal using c2000 F28379D?

Hi, I have tried to see a PWM signal but when simulating I get a 1 signal all the time.

I attach screenshots

I have connected pin 80 to pin 74 which are the GPIO0 and GPIO14 pins.

I know that the "ePWM" block is well configured because I have been able to see the output signal with an oscilloscope.

I hope you can help me, thank you in advance.

Cristina

Answer 1

[Sayan]

Hi Cristina,

If I am understanding it correctly, you are using a 4 kHz carrier frequency to generate the pwm. In this case, I can see you are using the GPIO digital input sample time of 0.1, which is very high for logging the PWM samples. Try to reduce the GPIO sample time to 1e-5 and log the signal in Simulink Data Inspector to visualize the signal. Ensure the GPIO block is configured correctly for the corresponding pin you are shorting.

You can find more information about GPIO in the following documentation.

https://www.mathworks.com/help/releases/R2022b/supportpkg/texasinstrumentsc2000/ref/c280xc2802xc2803xc2805xc2806xc2833xc2834xf28m3xf2807xf2837xdf2837xsf2838xf2838xm4f28004xf28002xf28003xgpiodigitalinput.html

Hope this helps to resolve the issue.

[Cristina]

Thank you very much Sayan. Thanks to your answer I have been able to solve the problem.

Cristina