Objective Development Forums

hi everybody
I have a problem with the project in the "www.recursion.jp/avrcdc/cdc-232" site .I used the "atmega8" schematic . I did everything that it say but my computer did not recognize it.
when I pull the ground wire ,the "usb device not recognized" message appear on the screen . or if I connect the reset pin in the ground the same message appear , otherwise the computer do not anything . I don't know what am I suppose to do now ...please help me

Hi.
The USB Communication Device Class (CDC) uses bulktransfers for exchanging data with the host.
( http://cscott.net/usb_dev/data/devclass/usbcdc11.pdf )

VUSB only implements USB low-speed devices (1.5Mbps) - bulk isn't allowed there.
Modern operating systems enforce these and therefore VUSB devices using bulk won't work (anymore).

But if somebody has an idea how to overcome this issue (without using an AVR with in-chip USB instead), I am interested in knowing, too.
Please let me know.

Best regards,
vouvoume