Problem with V-USB and USB 1.1 Hubs

General discussions about V-USB, our firmware-only implementation of a low speed USB device on Atmel's AVR microcontrollers
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Tweety955
Posts: 1
Joined: Wed Sep 16, 2009 11:08 am

Problem with V-USB and USB 1.1 Hubs

Post by Tweety955 » Wed Sep 16, 2009 11:15 am

I am using an ATtiny45 with V-USB. On Windows and Linux it works very fine but if i use an USB 1.1 Hub the device wont be recognized reliably in both operating systems. Does anybody have an idea :?:
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christian
Objective Development
Objective Development
Posts: 1443
Joined: Thu Nov 09, 2006 11:46 am

Re: Problem with V-USB and USB 1.1 Hubs

Post by christian » Tue Sep 22, 2009 10:57 am

This may have something to do with voltage levels or it may be more complex. But it's hard to say without a capture of the on-the-wire communication.
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Mike J.
Posts: 6
Joined: Mon Dec 13, 2010 4:52 am

Re: Problem with V-USB and USB 1.1 Hubs

Post by Mike J. » Mon Dec 13, 2010 6:41 am

Hello Tweety955,
I am using an ATmega8 with "vusb-20100715" and my OS is LinixMint10.
I can plug the Device in my USB1.1 "SunyLine 4xHub" and it works!

Firmware: /vusb-20100715/examles/hid-custom-rq

lsusb shows:
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 005: ID 16c0:05df VOTI
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
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