Question about CAN bus

jgschmidt · Joined: 03 Dec 2008 Posts: 184 Location: Gresham, OR USA

Another way to describe the CAN protocols is as a Publish and Subscribe system. Nodes publish or broadcast messages and don't care who listens. Subscribers listen for certain messages and respond to them, regardless of who sent them. It does take a little while to wrap your head around it but once you do it is very simple with the CCS drivers. If you're going to do a lot of work with CAN I recommend getting one of the CCS CAN dev kits and going through the exercises. I also use the Microchip CAN Bus Monitor Demo kit (MCP2515DM-BM) which comes with two identical boards. It gives you more nodes to play with and the included software lets you monitor and debug traffic.
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Jürgen
www.jgscraft.com

stoyanoff · Joined: 20 Jul 2011 Posts: 375

I have a question about MCP2515. Do I have to use separate oscillator or I can use the controller's one?! I'm going to use PIC18F2550.
Do I need pull-up resistors on SPI pins?!
Thanks!