Hi, 
	I'm trying to port a RS-485 application con CAN usign the 18F2580
and 18F4580. Currently, I have two nodes connected and I'm having some
trouble making them work, perhaps someone can help me a little.
	
	Here's what I have done: The schematic is prety simple, the MCP2551
has its right 5V supply, the TX pin is to the corresponding TX pin at the
PIC and the RX at the '2551 is at the Rxpin at the PIC.

	The pin RS is tied to VSS, that should be "high speed mode". 


Now the software. I think I mess up a little, so I started over. This is
what I'm doing.

1) All port pins are set to 1. All ports are set to digital pins.

	TRISA = TRISB = TRISC = 0xFF;
	ADCON1 = 0x0F;

2) CAN registers are initialized (here is where I guess I have an error)

	CANCON = 0x80;				// Request configuration
mode
	while( (CANSTAT & 0xE0) != 0x80 );	// wait for configuration
mode
	ECANCON = 0x00;				// Set for Mode 0 (Legacy)
	RXB0CON = 0x60;				// Set to ignore all
filters, masks 
							// and errors and
still get the mesages
	BRGCON1 = 0xFF;				// Baud rate set to slowest
	WAKDIS = 1;					// Disable WakeUp on
CAN
	
	CANCON = 0x00;				// Request Normal Mode
(leave configuration)
	while( (CANSTAT & 0xE0) != 0x00 );	// Wait for Normal Mode

3) The above is done on both nodes the same exact way. Now I have to
options:

	a) TRANSMITTER:
		Sends a counter:

		TXB0D0 = counter;		// Load a counter on the
transmition register
		counter += 1;		// Increment the counter
		TXB0SIDL = 0x60;		// Load de identifier
		TXB0SIDH = 0x24;		// Load the identifier
		TXB0REQ = 1;		// Request transmition of buffer 0
		while( TXB0REQ );		// Wait until transmition is
complete
		togle( LED );		// Togles a led
		DelayS(1);

		NOTE: The led does toggle, only when the other node, the
receiver
			is connected to de bus.

	b) RECEIVER
		
		if( RXB0FUL )
		{
			RXB0FUL = 0;
			togle( LED );
			PORTB = RXB0D0;
		}
		DelayMs(50);

		The LED does blinks very little time (3.8uS) when the
Transmiter toggles the state of LED, but the
		RXB0D0 register is always 0x00....

Any tips?

Regards,
Mauricio

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