How can I obtain 12epwm signals from F28379D Launchpad?

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Merve Aydin
Merve Aydin 2023-5-12
评论： Merve Aydin 2023-5-29
I want to see 12 epwm signals on the oscilloscope at the same time using TMS320F28379D launcpad, but Matlab/simulink-2022b does not allow me to use the same epwm block twice. I tried to set epwmA and epwmB using epwm1 block. According to the datasheet, I should have seen pwm from pins 39 and 40. However, I couldn't see it. I would be very happy if you could help.

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回答（1 个）

Vishwa
Vishwa 2023-5-16
Hi,
You should certainly be able to use multiple ePWM blocks, just make sure that each block is configured to a different ePWM module. TMS320F28379D launchpad has 12 ePWM modules, depending on your requirements you can use either all 12 ePWM blocks or 6 ePWM blocks. (1 block can generate 2 complementary pulses)
GPIO Pins in which you prefer to see the output can be configured from “Model Settings > Hardware Implementation”
For detail description of ePWM block in Simulink please refer the following documentation: Generate enhanced Pulse Width Modulated (ePWM) waveforms - Simulink - MathWorks India
Please see this example, which uses 2 ePWM blocks: Using Time-Base Counter Synchronization to Synchronize ePWMs and eCAPS - MATLAB & Simulink - MathWorks India
Hope it helps!
Regards,
Vishwa
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Merve Aydin
Merve Aydin 2023-5-29
Hello again Vishwa,
I have another question, I tried obtaining SPWM with the blocks you sent me last time. I want to change the ePWM trigger as it is in the attached file I'm sending. I couldn't find where to change the form of the trigger signal inside the block. Do you have any suggestions?
Thank you for your time,
Best regards...

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