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Altera_Forum's avatar
Altera_Forum
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16 years ago

Problem in sending a packet using ethernet MAC

Hi ...:) I integrated a custom MAC into my design. I transmitted a packet which I could see in the SignalTapII analyzer. But when I connected my NEEK board to another PC using crossover ethern...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Every synchronous interface should be constrained for setup and hold, according to the PHY datasheet (or MII specification). But if you are at 100Mbit/s the interface is at 25MHz only, and it *may* work without constraints. Still it is good practise to do it ;)

On some PC's the network hardware/driver automatically discards badly formed packets. You could try and see if you can disable those functions in the driver, or try with another PC (an old one, if possible ;) )