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CAN 18F6680

 
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rstny
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CAN 18F6680
PostPosted: Tue Dec 30, 2008 9:08 am     Reply with quote
Which CAN header is best for the 18F6680 ?
...and do I need to do anything for them to use the CANTX/RX on port G ?
Both header look like they use pins in port B.
Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Dec 30, 2008 2:45 pm     Reply with quote
The ECAN modules look similar between the 18F4580 and the 18F6680.
The block diagrams and register maps look similar. I don't have the time
to compare them in detail.

Here's the line that refers to Port B (the TRISB register) in can-18F4580.c:
Quote:
void can_init(void) {
set_tris_b((*0xF93 & 0xFB ) | 0x08); //b3 is out, b2 is in


In the 18F6680, CANTX1 is on pin G0 (CANTX2 is not normally used) and
CANRX is on G2, so change it to this:
Code:
set_tris_g((*0xF98 & 0xFE ) | 0x04);  // Pin G0 is out, G2 is input   

Create copies of the can-18F4580.c and .h files and rename them to
can-18F6680.c and can-18F6680.h and do any edits in those files.
rstny
Guest
PostPosted: Wed Dec 31, 2008 9:12 am     Reply with quote
Works like a charm...Thanks.
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