DFU atmegau82 even if in DFU mode dfu-programmer does not recognize it

Development Tools IDE 1.x
1

I have an arduino R1 and I needto reflash the firmware for the serial. what I did was:

I soldered the resistor into Arduino's Atmega8u2 (the very first one) and then I reset atmega8u2 and by wiring the pins as mentioned in: https://www.arduino.cc/en/Hacking/DFUProgramming8U2

I can confirm it via this message over my GNU/Linux machine by running dmesg that the arduino is in DFU programming mode:

   [ 1544.679504] usb 1-6: new full-speed USB device number 42 using xhci_hcd
   [ 1544.808341] usb 1-6: New USB device found, idVendor=03eb, idProduct=2ff7
   [ 1544.808350] usb 1-6: New USB device strings: Mfr=0, Product=1, SerialNumber=0
   [ 1544.808356] usb 1-6: Product: Arduino Uno DFU

I also to confirm that I run lsusb and I got the following result:

   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 002: ID 248a:8367  
   Bus 001 Device 058: ID 03eb:2ff7 Atmel Corp. 
   Bus 001 Device 003: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Further indicating to me that arduino is in DFU mode.

The I try to run:

sudo dfu-programmer atmega8u2 erase

But for some reason I get the following error:

dfu-programmer: no device present.

Do you know why I get this error and how I can fix it?

So far in order to fix that:

  1. I installed the latest version of dfu-programmer and compiled from source via Atmel USB DFU Programmer download | SourceForge.net but still I get the error. I also tried to compile it with libusb-1.0.0

  2. I also tried this version with libusb-1.0.0 but still the same error occurs.

I use ubuntu 16.04 in order to program that.

2

03eb:2ff7 at90usb82 DFU bootloader

sudo dfu-programmer at90usb82 erase

3 
03eb:2ff7  at90usb82 DFU bootloader

The question is how did you figure this out? I am asking because someone else may have the same problem in order to understand the nature of it better.

4

I just found it by searching.

Google 03eb:2ff7 Atmel Corp
Google 03eb:2ff7 dfu

http://www.linux-usb.org/usb.ids

Another way to do it.

~/Downloads/arduino-1.8.5/hardware/arduino/avr/firmwares/atmegaxxu2 $ ls
Arduino-COMBINED-dfu-usbserial-atmega16u2-Mega2560-Rev3.hex  arduino-usbserial						README.txt
Arduino-COMBINED-dfu-usbserial-atmega16u2-MegaADK-Rev3.hex   Genuino-COMBINED-dfu-usbserial-atmega16u2-Mega2560-R3.hex	UNO-dfu_and_usbserial_combined.hex
Arduino-COMBINED-dfu-usbserial-atmega16u2-Uno-Rev3.hex	     Genuino-COMBINED-dfu-usbserial-atmega16u2-Uno-R3.hex
arduino-usbdfu						     MEGA-dfu_and_usbserial_combined.hex

From the README.txt

Arduino Uno and Mega 2560 Firmwares for the ATmega8U2

This directory contains the firmwares used on the ATmega8U2 on the Arduino
Uno and Arduino Mega 2560.  The arduino-usbdfu directory contains the DFU
bootloader on the 8U2; the arduino-usbserial directory contains the actual
usb to serial firmware.  Both should be compiled against LUFA 100807.  The
two .hex files in this directory combine the dfu and serial firmwares into
a single file to burn onto the 8U2.  

To burn (Uno):
avrdude -p at90usb82 -F -P usb -c avrispmkii -U flash:w:UNO-dfu_and_usbserial_combined.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m

To burn (Mega 2560):
avrdude -p at90usb82 -F -P usb -c avrispmkii -U flash:w:MEGA-dfu_and_usbserial_combined.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m

Did you get it to work?

5

Yes I managed to work.