TMS320F280025: Internal capture EPWM frequency

Chen Yang

Part Number: TMS320F280025
Other Parts Discussed in Thread: SYSCONFIG

Hi Expert,

I want to check if F280025 could capture EPWM output frequency internally, rather than connect EPWN_GPIO pin to Ecap pin?

May be tru X-BAR could realize this? could you please provide a simply path?

Thx

0 Nima Eskandari over 3 years ago

You actually wouldn't need to connect the pins externally. INPUT XBAR has acess to your GPIO even when it is configured as EPWM OUTPUT.

Then you can route it internally to ECAP.

Nima

0 Chen Yang over 3 years ago in reply to Nima Eskandari

it's means that EPWM output to GPIO -> Input XBAR -> Ecap?

Could you please provide a snap from the TRM in EPWM, X-BAR and Ecap?

Thank you!

0 Nima Eskandari over 3 years ago in reply to Chen Yang

You are correct!

EPWM Output to GPIO

Then all GPIOs are available at INPUT XBAR. so you just pick your GPIO and INPUT XBAR

Then you use ECAP with that INPUT XBAR.

0 Chen Yang over 3 years ago in reply to Nima Eskandari

Thank you, just as the picture shows below:

Besides, could you please provide a example coding to customer to help them completer this requirements?

Highly appreciate!

+1 Nima Eskandari over 3 years ago in reply to Chen Yang

Exactly!

I would recommend using SysConfig which automatically generates your initialization code for you and you can configure all of this in the GUI!

Nima

0 Chen Yang over 3 years ago in reply to Nima Eskandari

Great! thank you Nima for your strong support!

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