Faulty CAN wiring can crash board about battery-emulator

[rjsc]

There is a pending pull request to add a timeout to the write operation but the repo owner didn't respond for over a year.
You can try to merge it privately and test.
miwagner/ESP32-Arduino-CAN#45

[rjsc]

The miwagner arduino driver and Thomas Barthe's arduino ESP-32 CAN driver are significantly different than the current ESP-IDF CAN driver. They are NOT direct ports.

The miwagner and Thomas Barth Arduino ESP32 CAN drivers have some big issues with queues, and it doesnt have any protection/safety with large multi-threaded/tasked programs. If you are trying to send CAN messages from several different areas of your multi-tasked code, it usually gets choked sooner or later....

And the biggest issue of all is that it doesnt have the IRAM_ATTR directive, which would allow it to try to access random parts of flash/code at ANY time....this includes during an OTA update (which disables flash-cache). If you leave the miwagner/Thomas Barth Arduino ESP32 CAN driver running during an OTA update, it was guaranteed to crash the whole ESP32.

The official ESP-IDF CAN driver doesnt have any of these issues, and is completely safe to use with any program, and have running at all times, including during an OTA update.

https://esp32.com/viewtopic.php?t=12607

Seems that the Arduino can stack indeed has problems and we need to use the official one from the esp32 idf.

[dalathegreat]

Some good info here: sandeepmistry/arduino-CAN#118

[dalathegreat]

Another repo with same problem: timurrrr/arduino-CAN#2

[dalathegreat]

Pull request merged to main that prevents the crash 💪 ! Thanks @rjsc and Caboom! #48