A keyboard is interfaced to usb through avr mega8. Any hardware can be interfaced using this procedure.

HIDKeys.2007-03-29
..................\Changelog.txt
..................\checksize
..................\circuit
..................\.......\hidkeys.pdf
..................\.......\hidkeys.sch
..................\License.txt
..................\main.c
..................\main.hex
..................\Makefile
..................\Readme.txt
..................\usbconfig.h
..................\usbdrv
..................\......\Changelog.txt
..................\......\CommercialLicense.txt
..................\......\iarcompat.h
..................\......\License.txt
..................\......\oddebug.c
..................\......\oddebug.h
..................\......\Readme.txt
..................\......\usbconfig-prototype.h
..................\......\usbdrv.c
..................\......\usbdrv.h
..................\......\usbdrvasm.asm
..................\......\usbdrvasm.S
..................\......\USBID-License.txt

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．