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Altera_Forum
Honored Contributor
Honored ContributorRouting 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_ForumHonored Contributor
Honored ContributorAh I was hoping this would be a sparkling example of a bidirectional ALTIOBUF in action.
The suggestion is to make "this" then.https://alteraforum.com/forum/attachment.php?attachmentid=13590&stc=1 I'm wondering tho if this is not harder to make, since it requires a tonne of setting up with no guarantee it is actually designed to intercept a USB signal in the way it's intended. Having to set up a mode register to create a device from scratch. I was looking at http://www.ti.com/lit/ds/symlink/tusb1310.pdf . Is there a goto part for this? Also I'm veering in other directions still, since the signal can be transmitted by the simplest wire. So I can always bare wire the handshake. and spoof over with a signal. Still looking if my FPGA can generate such voltages, since I may need a higher voltage standard. So, I'm thinking reading the spec, isn't this just 5v TTL, it seems very close, close enough? --- Quote Start --- A differential ‘1’ is transmitted by pulling D+ over 2.8V with a 15K ohm resistor pulled to ground and D- under 0.3V with a 1.5K ohm resistor --- Quote End --- Regards, Lukas.
