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opencores.com Ethernet core on Altera  - how to connect to male PCI interface?

Posted on 2008-10-18
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Hello,

I have some ideas for skipping TCP in a high level application, but first things first - right now I just want to take the "Ethernet MAC 10/100 Mbps" core (http://www.opencores.com/projects.cgi/web/ethmac) and connect it to a regular PC.

I have the following Altera FPGA:
http://www.altera.com/products/devkits/altera/kit-cyc3-starter.html

It's my understanding that a PHY chip is needed that ultimately interfaces with a female RJ-45 connector.

I'm guessing that the "wishbone" interface from the Ethernet core will ultimately be wired to a male PCI interface? Conceptually how does this work? I tried to read the wikipedia entry on wishbone and it sounds like greek to me (my background is VHDL and then higher level languages). I also read somewhere that the Altera's Avalon bus can be used?

At first I thought this was going to be easy.. I though I could just wire 32 of the FPGA's output pins to the 32 PCI pins.. wishful thinking :)
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Question by:Juzzam2
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Mc7400 earned 2000 total points
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Hello,

To simplify the life of communications between the components industry has created a bus called WISHBONE bus, just think of it as PCI bus while it is used only between chips CPUs, and SoC. the following link has a brief description.

http://en.wikipedia.org/wiki/Wishbone_(computer_bus)

Now the Ethernet opencore has two interfaces, one interface to connect to PHY and the other to WISHBONE bus to connect it to the RISC and to external memory, as the documentation claims.

Finlay, if your intention to connect the Ethernet to PCI, then opencore has another project to bridge between WISHBONE and PCI; So you can connect the two cores inside the FPGA and go! But not sure if it will work, anyhow in common sense it should work and reach your goals with regards.

HTH
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