Hi,

Our product is running on QNX and CPU is PPC440ep.

The CAN bus controller is MCP2515 chip which is on SPI communication. I am going to write a driver to support the CAN 
protocol. 

I am wondering where should I get start it? Is there any device driver guide I can go through? QNX is quite different 
than linux in terms of device driver. 

Thanks in advance.