Using the default PicoW SPI interface object the MCP_CAN library cannot communicate with the MCP2515.
PicoW GPs used: 16 MISO(SO), 17 SS(CS), 18 SCK, 19 MOSI(SI).
VDD on MCP2515 is 3V3. 20MHz crystal with two 15pF.
I swapped both the MCP2515 and the PicoW but the problem remains.
Is the MCP_CAN ready for the PicoW ?
If you have an oscilloscope, check for activity on the SPI lines.
On OCS2 is a sinus wave of 20MHz.
On all SPI pins there is activity.
The solution: CS and RESET must have a 10k pullup in case VDD is 3V3.
Now it works as expected.
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