nerdiyde / avr_can_flasher

An arduino library to flash an AVR MCU via CAN

AVR CAN flasher

This is a port for the ESP32 of the "MCP-CAN-Boot Flash-App" from Peter Müller. More information about this is available here: https://github.com/crycode-de/mcp-can-boot-flash-app

The bootloader

More information about the bootloader are available in the official repository: https://github.com/crycode-de/mcp-can-boot

Requirements

• ESP32 (Tested on an ESP32 Wrover-B)
• Connected CAN transceiver. (Tested with an MCP2515.)
• Enough free RAM on the ESP32 to load and parse the target hex file.

Usage

Please see the example "flash_hex_via_can.ino" in the example folder. The hex file needs to be stored in the SPIFFS of your ESP32. Please see https://github.com/me-no-dev/arduino-esp32fs-plugin for further information about how you can upload data to the SPIFFS.

Known issues and testing state

Tested and known to be working:

• Flashing
• Verification

Not tested:

• Reading only of hex files
• Different hex file sizes
• Other AVR MCUs than Atmega 328P
• Extended Frame Format

Test environment

• ESP32 incl. its integrated ESP32SJA1000 and an externally connected MCP2551 CAN tranceiver
• Atmega 328P incl. MCP2515 and MCP2551
• Hex file size: 70.569 Bytes
• Standard CAN frame format
• Target MCU reset via reset pin ()

TODO

• Test Extended frame format
• Integrate alternative "progress bar" for status report via serial

License

CC BY-NC-SA 4.0

Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International