I have a small question about your schematic for the emulator. You employ a CAN transceiver IC, but you only use the TX half of it . Is there a reason why you went to all the trouble of adding an extra comparator? Was it just for diagnostics or is there some deeper reason?
I am making an in car computer media player, and your work has transformed my approach since I can use the head unit to control everything, rather than having the computer do things - A vast improvement. This is an excellent piece of work that you have been polite enough to share with us. Your code seems very readable to me and again thankyou for making it easy for me. I shall probably implement the same process using a PIC, becuase I have all the development tools available (I'm an RF electronics engineer - designing mobiles and other stuff). I shall ensure that you are credited with having done the hard bits and publish my solution in due course
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