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Altera_Forum's avatar
Altera_Forum
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14 years ago

Strange problem with IORD_16DIRECT

Hi, I have a 16-bit pio (input) in my sopc and I want to access the data through IORD_16DIRECT. The data shown on the port is 0x00, 0x01, 0x02....0xff (verified through signaltap). However, th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I don't see any synchronization system in your code, so you have no way of defining or detecting when you read the PIO port.

If the PIO port input changes faster than your software can read it, then you'll miss some values.