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Altera_Forum's avatar
Altera_Forum
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14 years ago

Triple speed ethernet problem

Hi Guys I have problem with the triple speed ethernet:(. I can't transmit any thing and output equal zero all the time:eek:. this is a snap shot of the signal tab ;) Thanks in advance for eve...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Are you sure you are synchronizing SignalTap correctly? If the TX led blinks it means that the PHY is getting something from the TSE. Maybe you are missing it.

If you put the preamble on the Avalon Stream as I saw on the first screenshot, if the link between the TSE and the PHY is set up correctly then the PHY will send two preambles: one added by the TSE and yours. This won't be seen as a valid Ethernet packet by any other node on the bus, so this could explain why you don't see anything.