diff options
| author | David A. Mellis <d.mellis@arduino.cc> | 2012-09-13 10:39:59 -0400 |
|---|---|---|
| committer | David A. Mellis <d.mellis@arduino.cc> | 2012-09-13 10:39:59 -0400 |
| commit | 6225a8596005bfb0be68fa641f5b47d01a95c12d (patch) | |
| tree | 8649fca09bb993a878d6a6ee50b1fdc6ee7d9eb0 /firmwares/atmegaxxu2/README.txt | |
| parent | 1a0f22225b9ba34c90e1104ea1281976027979c1 (diff) | |
Moving ATmegaXXU2 firmwares into subdirectory.
Diffstat (limited to 'firmwares/atmegaxxu2/README.txt')
| -rw-r--r-- | firmwares/atmegaxxu2/README.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/firmwares/atmegaxxu2/README.txt b/firmwares/atmegaxxu2/README.txt new file mode 100644 index 0000000..386dcf0 --- /dev/null +++ b/firmwares/atmegaxxu2/README.txt @@ -0,0 +1,33 @@ +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 + + +Note on USB Vendor IDs (VID) and Product IDs (PID): The arduino-usbdfu +project uses Atmel's VID and MCU-specific PIDs to maintain compatibility +with their FLIP software. The source code to the arduino-usbserial +project includes Atmel's VID and a PID donated by them to LUFA. This +PID is used in LUFA's USBtoSerial project, which forms the basis for +arduino-usbserial. According to the LUFA documentation, this VID/PID +combination is: + + "For use in testing of LUFA powered devices during development only, + by non-commercial entities. All devices must accept collisions on this + VID/PID range (from other in-development LUFA devices) to be resolved + by using a unique release number in the Device Descriptor. No devices + using this VID/PID combination may be released to the general public." + +The production version of the arduino-usbserial firmware uses the +Arduino VID. This is only for use with official Arduino hardware and +should not be used on other products.
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