In an (old) update datasheet for the MCP2515, Microchip states that setting the RXB[1:0] bits to a value other than '00' or '11' is not recommended. It seems as though Microchip doesn't recommend using the MCP2515's ability to specify filtering per standard vs extended frame formats.
In an (old) update datasheet for the MCP2515, Microchip states that setting the RXB[1:0] bits to a value other than '00' or '11' is not recommended. It seems as though Microchip doesn't recommend using the MCP2515's ability to specify filtering per standard vs extended frame formats.
https://github.com/autowp/arduino-mcp2515/blob/d424134d2e19398087bdbcf1dd0c39c4d1e1e170/mcp2515.h#L289-L290