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Altera_Forum
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11 years ago

Constraining an SPI interface

Hello all, What is the proper way of constraining a 4-wire SPI master interface? I have several devices connected to my SPI bus, and fastest one can accecpt a SCLK up to 33 ns period, with setu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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Any suggestion on how?

I tried several ways but no one seems to work...

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Typically I start with the error message from TimeQuest and work out what signal it is complaining about. I'd start by using the signal name in the error and see if adding a generated clock helps. If it does, then I'd figure out a cleaner (more generic) way to determine the clock using the TimeQuest Tcl functions.

Cheers,

Dave