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Altera_Forum's avatar
Altera_Forum
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12 years ago

Is it save to use the PIO in QSYS

Hello, I have several PIOs in my QSYS design to communicate with some of my own designed IPs. My IPs mostly use other clock signals than the PCIe-Clock and are therefore not synchronized to t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

No, there is not a single Warning about my Pulsecounter, everything works just fine. I use the rising_edge on the Input to Increment the Output-Signal. That's all. I even don't see a chance for any loop. It's just like "If (rising_edge(Input)) then (Output + 1) else (Output)". Sorry to disappoint you.

Hmm, perhaps they are using an attribute like 'STABLE or 'STABLE(t) on the Inputs to ensure the data will not be read during changing.