Hi I have tried many things. So far I know that the ATMEGA8U2 IC needs a firmware wich must be done in DFU mode. The other thing is that the ATMEGA2560 IC must have a bootloader.
Now I tried to put the Atmega8 in DFU mode but since the Atmega2560 does not have a bootloader, the led at pin13 won't blink. When I tried to load the drivers for Flip, it showed me that the device driver already installed. But i am pretty sure that it isn't as when its done, it doesn't recognize the IC.
I tried to put it in DFU mode by using following steps.
a) Short RESET with ground.
b) Short DTR with ground.
c) Disconnect DTR and RESET from ground.
(given at http://arduino.cc/en/Hacking/DFUProgramming8U2
Now the Flip won't open the USB port.
There is no *.inf file present in the C:/Program Files/Atmel/usb/
So i am confused. Can I simply load the hex file in Atmega8U2 by using a USB to DB9 converter programmer?
I also do have the hex code of the bootloader. Should i also try to burn it directly?
Is it safe?