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Altera_Forum's avatar
Altera_Forum
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9 years ago

Routing USB through FPGA

Hi, I'm having some difficulties routing USB through my DE-1 FPGA board. The goal is to make the FPGA chip look like a bare wire to an USB throughput. The thought was to have it perform the han...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Assuming I understand you correctly, I don't think this is at all practical.

Are you proposing to intercept the USB line (D+/D-)? Are you proposing to interpret the data on the line and determine when to turn the bus around?

Does Cyclone II (or Cyclone V, depending on DE-1 board) support the USB I/O standard or an alternative, suitable I/O standard? Which I/O standard are you proposing to use?

I think, without dedicated USB phys attached to the FPGA, you're not likely to get anywhere.

Take a look at ftdi (http://www.ftdichip.com/). They do plenty of USB phys which you could attach to an FPGA. You may be able to do what you're trying to do by connecting two to your FPGA 'back-to-back', so to speak.

Cheers,

Alex