Welcome to the blog of Dr. Ken Tindell, CTO of Canis Automotive Labs. This blog is focused on the work Canis is doing on CAN bus and CAN security, but also covers the design of embedded software and hardware for automotive systems and the Yes We Can project at Canis that develops hardware, software and tools for CAN bus: the CANHack toolkit for injecting faults into the CAN protocol, CANPico and CANHack hardware boards for the Raspberry Pi Pico, and the can2 logic analyzer CAN protocol decoder.

Ken Follow CTO of Canis Automotive Labs

New CANPico firmware released

We’ve pushed a new version of the CANPico firmware that updates it to MicroPython v1.16. The update also fixes some bugs but the biggest change is that the firmware adds robustness to SPI noise: it’s very easy to accidentally cause the SPI pins to pick up noise from logic analyzer probes where the logic analyzer isn’t grounded, and corrupted values written to or read from the CAN controller can cause things to go crazy. The firmware keeps counters for the number of times corrupted values with a new method get_diagnostics().

The documentation has been updated to reflect the new API call, and there is a new version of the canpico.py file of example functions that are useful when trying out different things on the CANPico board. This file can be copied to the CANPico board using the rshell utility.

Useful links

The CANPico board is available from SK Pang
The firmware, reference manuals, schematics and Kicad design files can all be found on the YesWeCAN GitHub repo.
How to install firmware on the Raspberry Pi Pico
The Canis Labs open source can2 CAN protocol decoder for Sigrok-compatible logic analyzers
The canpico.py Python examples file

13 Jul 2021

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New CANPico firmware released

Useful links

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