I've kind of figured out how to hack N2K at the hardware/software level.
Basically, this will mean creating a custom opto-isolated component from the Atmel AT90CAN128 and Philips 82C251 chipsets. It will include USB and SPI interfaces. SPI will be for ISP programming of the AVR and maybe also hooking in Analog iSensor chips. The USB interface will allow a raw software hook into and out of N2K.
Looking for co-conspirators and fellow travelers.
We have some collaborators for the Duino2000. The resources page contains some links to similar projects.
Very interesting. I hope you'll keep us informed of progress.
You can find my NMEA2000 stack running on an ATMega128 with MCP2515 at
http://www.mikrocontroller.net/topic/143234
I also build an NMEA2k unit converting TTL pulses from my speedometer into N2k CAN messages.
Phili
I have ported Philipp code to the Microchip PIC24/dsPIC33 family. There is still some work to be done, but I have it sending data from a B&G mast head to the network.
My test set up is an Microchip explorer 16 board with a dsPIC33FJ256GP710 connected with the internal ECAN to a external MCP2551 CAN transceiver. On the CAN bus I have a Simrad AT10, and an Actisense NGT-1, a Peak CAN/USB. The AT10 is connected to a Garmin GPS and a B&G 2000 processor to generate and receive packets. A serial port is connected to PORT2 on the explorer16 board at 115200 for diagnostic messages.
http://www.keversoft.com/downloads/FreeRTOS_Test_1.rar
lafleur @ lafleur . us