Hi Vitaliy,
I agree, I will probably get one of those, it just looked like a nice
project...
Thanks
	Luis

Luis Moreira
luis.moreira@jet.uk
tel. 01235464615
JET PSU Department
UKAEA Culham Division
J20/1/55, Culham Science Centre
Abingdon
Oxfordshire
OX14 3DB


-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of Vitaliy
Sent: 19 January 2009 16:32
To: Microcontroller discussion list - Public.
Subject: Re: [PIC] RS232 to CAN adaptor

"Luis Moreira" wrote:
> Hi all,
> I am looking into a problem in a system that uses CAN, and have the
need
> to "look" at the data flowing on the Bus. I do not need the
> functionality of those analyzers used in cars for resetting setting
and
> so on, I just need to see the traffic on the bus and possibly later
send
> some packets.
> I had a look at the CAN bus specification and I am looking at the bus
> now using one of microchip's CAN transceivers and a logic analyzer but
> is not the easiest of things to do Hence I would like to build my own
> CAN Analyzer. I have looked at the datasheet of the PIC18F2680 and it
> seem that if I set the acceptance filters to all zero it will accept
any
> message, hence I could see all the traffic on the bus is this correct?
> Best Regards

Luis, you are correct, but in this case you would be better off with an 
off-the-shelf product. For instance, Lawicel makes a USB to CAN and
RS232 to 
CAN converters:

http://www.can232.com/
http://www.canusb.com/

Someone told me recently that there are schematics and firmware
available 
for a clone of this device. The protocol is very simple, and there is
even 
some software available for it, including examples with source.

Vitaliy 

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