Propeller 10Mbps Ethernet Challenge

jazzed

Would it be at all possible for a Propeller COG running PASM to transmit/receive buffered Ethernet frames on propeller pins at 10Mbps? Maybe one direction per COG? Maybe using multiple COGS? See this link for Ethernet link layer definition: http://en.wikipedia.org/wiki/Ethernet#Physical_layer

I don't really have time to follow through on trying this. Maybe others do?

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--Steve

Phil Pilgrim (PhiPi)

This has come up before — for transmission anyway. See this thread. Reception will be much harder.

-Phil

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'Still some PropSTICK Kit bare PCBs left!

jazzed

Thanks Phil. Saw code posted from Hippy. I'll poke around when I have more time. So TX worked, but RX was not possible/reliable?

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--Steve

Phil Pilgrim (PhiPi)

Steve,

My Manchester output routine (page 2) kinda worked. There may still be an open issue regarding the phase of the chroma counter. (It's been awhile.) I don't know if anyone's attempted RX yet.

-Phil

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'Still some PropSTICK Kit bare PCBs left!

hippy

The raw bit stream is probably too fast (20Mbps) to be decoded by bit-banging on a single cog, but if it could be de-Manchester Encoded, then clocked into a shift register it would drop to just 1.25MBps which could be manageable, at least to get bytes into the Propeller for subsequent decoding.