I'm trying to update my viper with new firmware but when I go to upload the firmware through the O2D software I get a message saying "Check Atmel USB Driver"
When I connect the board with the flip button down (caps lock) and go to device manager the viper shows up as a "ATm32U4DFU" under Universal Serial Bus devices
What do?
Hey swimmingbird, hopefully I can help you out.
Just ignore the showing up as "ATm32U4DFU" and "Check Atmel USB Driver" errors you are getting now.
Have you tried using FLIP? Download here:
http://www.atmel.com/tools/FLIP.aspxI use it to flash my Viper, as well as my HHKB running TMK.
Just plug in the Viper while holding down Caps Lock.
And follow the instructions at the very bottom of the page here:
http://duck0113.tistory.com/84Duck gives you instructions on how to flash using FLIP software. (translate using chrome)
Make sure you select ATmega32U4 at the beginning or else it won't flash properly.