Burning the Sanguino Bootloader
This tutorial uses Ladyada's USBTiny to burn the bootloader via ISP (in-system programming) to an Atmega644p based RepRap board. Other Atmel chips should also work (ATmega1284 is NOT supported by the USBTiny programmer. See: AVR_Programmers). You can also burn the Sanguino Bootloader using an Arduino as the ISP. Charles Gantt has written an excellent tutorial and uploaded it to the Wiki here Burning_the_Sanguino_Bootloader_using_Arduino_as_ISP.
USBTiny on Windows
You will need:
- Sanguino based RepRap board with an ISP header and Atmega644p (RAMPS, Gen6, Sanuinololu, etc.).
- USBTiny and Windows drivers
- Arduino 018 with Sanguino extension
Once you have the above hardware and software, burning the bootloader to the Atmega644p is a simple process:
- Connect the six pin cable of the USBTiny to your RepRap board's ISP header. Orientation is critical (red wire corresponds to pin 1)!
- pin 1 on the Arduino ISP header is the "MISO" pin. On most PCBs, such as http://reprap.org/wiki/File:Sanguinololu-top.jpg , pin 1 has a square pad, all other pins have a round pad.
- Connect a power supply to your RepRap board and turn the supply on.
- Connect a USB cable from your computer to the USBTiny. If this is the first time you've used the USBTiny, you will be prompted to load its drivers.
- Open Arduino.
- Click Tools. Set Board to "Sanguino"
- Click Tools. Under Burn Bootloder, choose "w /USBTinyISP". There may be more than one occurrence in the list; usually the first works. If not, try the next.
- Arduino will begin burning the bootloader. The process takes about a minute or less (if you get an error initialization failed, rc=-1 then try burning using the terminal instructions).
- After Arduino reports "Done", press the reset button on your RepRap board.
- Disconnect the USBTiny's USB cable, then disconnect power from the RepRap board. You're ready to load firmware!
USBTiny on Ubuntu
here's how to do it from the shell:
sudo apt-get install libusb wget http://sanguino.googlecode.com/files/Sanguino-0018r1_1_4.zip unzip Sanguino*zip sudo avrdude -p atmega644P -c usbtiny -U flash:w:Sanguino/bootloaders/atmega644p/ATmegaBOOT_644P.hex
