18F26K80 Code Optimisation.

[tumbleweed]

Try using a clock osc chip instead of a crystall or resonator.

That's what I used (an external 20Mhz osc) and it worked for me.
Of course, that doesn't mean it'll work for all chips.

If you want to increase the speed switch to a chip that has the CAN controller builtin.
That avoids all the SPI transfers to the external controller.

Why use the 2515 at all when the K80 has CAN?