updating the DFU bootloader on ATMega8U2 of Arduino UNO

Hi Everyone,

I am trying to reload the DFU bootloader in the ATMega8U2 of the Arduino UNO. I took the DFU bootloader source code from the D:\arduino-0022\hardware\arduino\firmwares\arduino-usbdfu and placed it in LUFA 100807 project's directory and used WINAVR's programmer's notepad (pn) to generate the .hex file for the DFU bootloader.

I used the commands: make clean make all make program

I kept the Arduino UNO in DFU mode before generating the hex file. when the 'pn' runs the command make program it is giving the following error:

avrdude: usbdev_open(): did not find any USB device "usb"

Do I need to install any USB drivers to make the Arduino UNO in DFU mode to look like a USB device? If so, where can I find the drivers? Am I following the right method to reload the DFU bootloader? I followed the readme.txt in the arduino-usbdfu directory.

Best Regards, Anil Palaparthi.

Same problem man. I am using Flip , and the moment I enabled the DFU mode , The windows started to look for drivers and then message appeared "can't install drivers "

If you are using Windows , and Atmel Flip for DFU bootloader programing, then the drivers are located at : (where ever you installed Flip )\flip 3.4.2\ usb