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Does your PCI express motherboard support JTAG, do you have software drivers to operate it?
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Good question. Nothing stated in the Motherboard manual. And software drivers is a different story. Will require developing if its possible..
This path seems to be too much of a bother.
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In principle (by design of the JTAG protocol), it's possible to update data registers of multiple devices in a JTAG chain simultaneously. Practically, I doubt that it's supported by standard tools, e.g. Altera Quartus.
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I see. Thanks for the heads-up.
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With reasonable effort, connecting a hardware wire between the boards that propagate the trigger seems preferable. What's an acceptable delay and skew for the trigger?
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Delay is no issue. Can be seconds even.
Of the top of my head, skew between all fpgas when they trigger should be less than 5nS.
Slightly off-topic.
But would a broadcast packet via ethernet accomplish this? There are gigabit ethernet ports available on the dev kit..
Edit.. PCI Express also has multicast. I can't seem to find skews for them though..
Thanks
ZubairLK
Honored Contributor
