v-usb with usb 3.0?

General discussions about V-USB, our firmware-only implementation of a low speed USB device on Atmel's AVR microcontrollers
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1.21Gigawatts
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v-usb with usb 3.0?

Post by 1.21Gigawatts » Sat Feb 28, 2015 7:27 pm

I have built several devices with v-usb, and tested on hundreds of computers. I have only found three usb ports which did not recognize my v-usb devices, and it turns out that all three of them are USB 3.0 ports.

Are there known problems with 3.0 vs v-usb? Is there something to be done? I have not yet hooked up my oscilloscope to see what's going on, but if that's what it takes...

I have tried this with the two dropping diodes and with the two zeners, neither works.

Any and all suggestions are welcome.

Thanks.
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ulao
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Re: v-usb with usb 3.0?

Post by ulao » Mon Mar 02, 2015 3:20 am

From what I here is buggy and will not work right. Also my project does not work on my 3.0 port. I can not find anything official on this, and I too would like to here from Christian on this.
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1.21Gigawatts
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Re: v-usb with usb 3.0?

Post by 1.21Gigawatts » Mon Mar 02, 2015 4:42 pm

It's also hard to find information on this because the current configuration of this phpBB does not allow "3.0" as a search term. Perhaps an adjustment is in order?
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blargg
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Re: v-usb with usb 3.0?

Post by blargg » Mon Mar 02, 2015 11:15 pm

Google "usb 3.0" on this site yields only this and a thread from 2009.
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1.21Gigawatts
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Re: v-usb with usb 3.0?

Post by 1.21Gigawatts » Tue Mar 03, 2015 3:07 am

blargg wrote:Google "usb 3.0" on this site yields only this and a thread from 2009.


So from that, what is one to conclude?
a) Everyone's USB 3.0 works fine?
b) Nobody cares?
c) "3.0" doesn't search correctly?
.
.
.
z) something else?
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blargg
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Re: v-usb with usb 3.0?

Post by blargg » Tue Mar 03, 2015 8:47 am

I'm a thrifty hobbyist and it'll be years before I have a machine with USB 3.0. I wonder whether others also use older hardware that is perfectly fine for this kind of work.
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ulao
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Re: v-usb with usb 3.0?

Post by ulao » Wed Mar 04, 2015 4:03 pm

a) Everyone's USB 3.0 works fine?
b) Nobody cares?
c) "3.0" doesn't search correctly?

a) Get one person here to say V-USB works on a 3.0 port.
b) not many
c) its not an easy search no.
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xiangrui
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Re: v-usb with usb 3.0?

Post by xiangrui » Mon Mar 09, 2015 4:16 pm

I just tested USB ASP device on my add-on USB 3.0 ports under Windows 7, and it works flawlessly.
-Xiangrui
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cpldcpu
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Re: v-usb with usb 3.0?

Post by cpldcpu » Sun Jul 12, 2015 6:13 pm

I also noticed odd things when connecting V-USB devices to USB3.0 hubs.

- Somehow it takes much longer for a devices to be recognized. The host will simply wait forever to start enumeration? Why? Very confusing.

- Things get out of sync fairly often.
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Sinnlosvoll
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Joined: Thu Oct 01, 2015 9:37 am

Re: v-usb with usb 3.0?

Post by Sinnlosvoll » Thu Oct 01, 2015 9:43 am

I have VUSB on one of those USBasp clones and it works really solid, no matter if it is connected to a direct usb 2 or 3.0 port or to an usb3.0 hub and both front and back ports.
Hope that helps.
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