2515 reset watchdog

[j4m3s]

Have combined two changes here - happy to discuss. Both changes are to the MCP2515 code only.

• The first aligns the priorities of the MCP2515 threads to match the priorities in the 2517 code and the internal controller code.
• The second adds a watchdog thread that runs every 2 seconds to check the chip for an error state and reset it if needed. This brings the MCP2515 chip code up to match the 2517 code.

[Modellfan]

Hi James, is the MCP2515 working for you with this changes? Did you try it with ESP32RET? I spend many hours to fix the 2515 driver and it is working now. (See my push). However I get ESP32RET not working with it.

[j4m3s]

Hi @Modellfan

I didn't have any issues with MCP2515 code. My PR was mainly behind-the-scenes improvements rather than anything necessary to get it to work. I've had a scan through the changes on your fork; there's quite a lot of whitespace and logging changes, and a few hard-coded values - I can't quite tell what changes you made that were necessary to get it to work for you?

In the end I switched to an MCP2518FD chip (which uses the 2517 code) so haven't been using the MCP2515 code. Maybe something has changed since I last used it successfully...

sorry, to answer your second question, I never tried it with ESP32RET, I used something else for CAN sniffing/ decoding.