CannyFlash

Bootloader that allows flashing Arduino device via onboard CAN Interface (MCP2515)

Current status

Compiled Bootloader stored in CannyFlash/Bootloader_bin

Only Atmega32u4 (Arduino Leonardo) (tested) Atmega328P (UNO) - developing

Arduino IDE preparation

Copy Bootloader directory

under {ArduinoDirectory}/hardware/avr/1.8.3/bootloaders create folder cannyflash, put file "cannyflash_v1_leonardo.hex" in the folder

Add custom board

Add the following to the end of "boards.txt" file (under {ArduinoDirectory}/hardware/avr/1.8.3)

## CannyFlash Bootloader
canny.name=CannyFlash v1 (Arduino)
canny.build.board=AVR_UNO

canny.upload.tool=avrdude
canny.upload.protocol=arduino
canny.bootloader.tool=avrdude

## CannyFlash Bootloader / 32u4
## ----------------------------------------------
canny.menu.cpu.atmega32u4=ATmega32u4 (Leonardo)
canny.menu.cpu.atmega32u4.upload.maximum_size=28672
canny.menu.cpu.atmega32u4.upload.maximum_data_size=2560
canny.menu.cpu.atmega32u4.upload.speed=19200

canny.menu.cpu.atmega32u4.bootloader.low_fuses=0xff
canny.menu.cpu.atmega32u4.bootloader.high_fuses=0xd8
canny.menu.cpu.atmega32u4.bootloader.extended_fuses=0xcb
canny.menu.cpu.atmega32u4.bootloader.file=cannyflash/cannyflash_v1_leonardo.hex
canny.menu.cpu.atmega32u4.bootloader.unlock_bits=0x3F
canny.menu.cpu.atmega32u4.bootloader.lock_bits=0x2F

canny.menu.cpu.atmega32u4.build.mcu=atmega32u4
canny.menu.cpu.atmega32u4.build.f_cpu=16000000L
canny.menu.cpu.atmega32u4.build.vid=0x2341
canny.menu.cpu.atmega32u4.build.pid=0x8036
canny.menu.cpu.atmega32u4.build.usb_product="Arduino Leonardo"
canny.menu.cpu.atmega32u4.build.board=AVR_LEONARDO
canny.menu.cpu.atmega32u4.build.core=arduino
canny.menu.cpu.atmega32u4.build.variant=leonardo
canny.menu.cpu.atmega32u4.build.extra_flags={build.usb_flags}

Currently only supports Leonardo (32u4)

Add Programmer (for uploading custom firmware)

Add the following to the end of "programmers.txt" file (under {ArduinoDirectory}/hardware/avr/1.8.3)

canisp.name=CannyFlash Programmer
canisp.communication=serial
canisp.protocol=arduino
canisp.speed=19200
canisp.program.protocol=arduino
canisp.program.speed=19200
canisp.program.tool=avrdude
canisp.program.extra_params=-P{serial.port} -b{program.speed}

Flash CannyFlash Bootloader

To Flash bootloader, you need another Arduino UNO and upload Arduino ISP (from example) Connection please refer to Arduino ISP

Once everything is done, back to Arduino IDE, tools -> Programmer choose CannyFlash Programmer Don't forget the port should choose the UNO that contains Arduino ISP then tools -> Burn Bootloader

Upload CannyFlash

Prepare another Arduino Leonardo (UNO also works but it will fail while verifying the upload) with MCP2515. Upload CANISP_Programmer, we will now call this device CannyFlash Programmer

Connect Target Device with CannyFlash Programmer via CAN

In Arduino IDE, change the port to the CannyFlash Programmer (i.e. not the one you flash firmware).

CannyFlash Programmer should be fast blinking it's LED, meaning that it is waiting for the Magic Packet from CAN bus.

Connect target to the CAN bus, poweron or reset target device. If programmer received magic packet from target device, password will be sent. If password is accepted, the Target device will enter "program mode" and stops blinking.

In Arduino IDE, Tools > Board > CannyFlash V1 Arduino, choose the right processor, and the COM port is the CannyFlash Programmer.

You can hit Upload and it should work like usual Arduino variants!

Remember

Every time before upload, you need to reset both CannyFlash Programmer and target device.

gueei/CannyFlash