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InoAVRDragon

A workaround for Arduino/#650 as it occurs for the AVR Dragon ISP programmer. Some people are getting the error message: avrdude: failed to sync with the AVR Dragon in ISP mode when trying to Burn Bootloader using the AVR Dragon programmer using the Arduino IDE. The problem is that the Arduino IDE's standard Burn Bootloader process is done in two avrdude commands, which are sent without enough delay between them.

This workaround adds AVR Dragon (workaround), AVR Dragon HVSP mode (workaround), and AVR Dragon PP mode (workaround) programmers to the Tools > Programmer menu. This programmer definition causes the erase and bootloader steps to be done in the first avrdude command so burning the bootloader is accomplished successfully even though the second avrdude command fails as usual.

Comparison With Alternative Workaround

Another workaround has been presented in the Arduino Forum by dmjlambert: http://forum.arduino.cc/index.php?topic=345838 here is a comparison of InoAVRDragon vs the dmjlambert workaround:

Pros

  • Doesn't require modification of any Arduino or other hardware core files.
  • Doesn't need to be redone every time the Arduino IDE or any hardware core with a platform.txt is updated.
  • Doesn't affect any programmer except for AVR Dragon.

Cons

  • Burn Bootloader appears to fail even when successful.
  • Burn Bootloader process does not follow ideal command order and does not set the lock bits.

Burn Bootloader Process

Unfortunately, this workaround causes the Burn Bootloader process to work differently than normal.

Normal Burn Bootloader

  1. Perform chip erase
  2. Set lock bits according to {bootloader.unlock_bits}
  3. Set efuse
  4. Set hfuse
  5. Set lfuse
  6. Flash bootloader .hex file
  7. Set lock bits according to {bootloader.lock_bits}

InoAVRDragon Burn Bootloader

  1. Perform chip erase
  2. Flash bootloader .hex file
  3. Set lock bits according to {bootloader.unlock_bits}
  4. Set efuse
  5. Set hfuse
  6. Set lfuse

Installation

There are two options for installing InoAVRDragon:

Boards Manager

This installation method requires Arduino IDE version 1.6.4 or newer.

  1. Start the Arduino IDE.
  2. File > Preferences
  3. Enter the following URL in Additional Boards Manager URLs: https://per1234.github.io/InoAVRDragon/package_per1234_InoAVRDragon_index.json
    • If you already have a URL in that field, separate the URLs with a comma.
  4. Click "OK".
  5. Tools > Board > Boards Manager...
  6. Wait for the downloads to finish.
  7. Scroll down until you see InoAVRDragon by per1234. Click on it.
  8. Click Install.
  9. Wait for installation to finish.
  10. Click Close.

Notes:

  • If you are using Arduino IDE 1.6.6 then you may need to close Boards Manager and then reopen it before the AVR Dragon (workaround) entry will appear.
  • If using Arduino IDE older that v1.6.6 you may need to restart the IDE to make the AVR Dragon (workaround) programmer appear in the Tools > Programmer menu.

Manual Installation

  1. Download InoAVRDragon from one of the Source code links of the newest release at: https://github.com/per1234/InoAVRDragon/releases.
  2. Extract the downloaded file.
  3. Copy the extracted folder inside your sketchbook/hardware folder. You can find the location of the sketchbook folder in the Arduino IDE at File > Preferences > Sketchbook Location
  4. If the Arduino IDE is running, then restart it.

Usage

Burn Bootloader

  1. Connect the AVR Dragon to your Arduino.
  2. Select Tools > Programmer > AVR Dragon (workaround).
  3. Select the correct board from Tools > Board.
  4. Click Tools > Burn Bootloader.
  5. The bootloader will be burned to your Arduino but then the avrdude output will fail with the error message avrdude: usbdev_open(): did not find any USB device "usb". This is because the second avrdude command failed, however if you enable File > Preferences > Show verbose output during: upload (check) and examine the avrdude output fully, you will see that the first command was successful and the bootloader was burned in that command.

Upload Using Programmer

The Upload Using Programmer process should work as normal when using the InoAVRDragon programmers and complete without errors.

Contributing

Pull requests or issue reports are welcome! Please see the contribution rules for instructions.