Can I trigger ethernet transmission directly(without interrupt service) using PL signal?

[TinglePan]

I am using ZCU104 board. I have a PL timer IP and I want PS GEM to start transmission when the timer interrupt is generated(with a precision range, about +-10us). I can have all transmission stuffs(descriptor filling, data preparation) done before the interrupt is generated, so all this interrupt does is to set off the transmission. But to set off the transmission using interrupt service on PS side would be a little slow and the delay is somehow not stable. So can I bypass the interrupt process and directly trigger the transmission using the interrupt signal?

[nanz · Accepted solution]

HI @TinglePan ,

I do not think there is a way of doing it without interrupt service to PS.

GEM does not have any external signals to directly control transmit_go. You may want to look at the registers write when timer is up but this will be without interrupt signal directly handled.

[TinglePan]

OK, so I should poll the timer counter register right? Thank you anyway.

[nanz]

Hi @TinglePan ,

Yes, that makes sense.