Can I enable the ePWM block output using the trip zone submodule (TZSEL)?

5 次查看（过去 30 天）

Ramon Lopez Erauskin 2020-4-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/515586-can-i-enable-the-epwm-block-output-using-the-trip-zone-submodule-tzsel

评论： tcagdas 2023-3-23

Hi all,

I am using the F28335 controlCARD. I am generating 2 different pulses using 2 ePWM blocks. The switching frequency is set to 20kHz and DSP is 150MHz. The width of the pulses I am generating is of 10us. I am able to externally measure them from their corresponding GPIOs (ePWM3A->GPIO04 and ePWM5A->GPIO08).

As you can see in the figure, I want to enable/disable these pulses using the trip zone submodule. I am trying to do it placing a "1" or a "0" through the TZSEL input of the ePWM block. I have tried several configurations within the trip zone submodule, but none seems to allow what I am trying to do.

I have specified the timer period, the CMPA value of each ePWMxA and enabled the cycle-by-cycle (CBC) of the trip zone submodule.

The output signals have the desired frequency and pulse width, but I expected them to be OFF when the input of each ePWM block is "0" and ON when the input is "1". I see them ON continuously. I have tried forcing the ePWMxA to High or Low, and also enabling the OST.

Can anyone suggest me how to resolve this issue? Thanks in advance.