Aaron's Homepage Forum
Aaron's Homepage Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Electronics
 Auto
 binary vs BCD
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

monobrow
New Member

United Kingdom
4 Posts

Posted - Oct 14 2009 :  8:59:03 PM  Show Profile  Reply with Quote
Hi Everybody,

this is my first time on this forum.

I was wondering if you could help me with a project of mine.
I'm trying to fit a navigation unit from a newer car into an older car, but the communication bus from the navi unit to the instrument cluster speak in different binary code.

I've been told the navi unit communicates in Binary Coded Decimal and the the instrument panels speaks in plain binary.

Would the basic stamp be suitable in converting the signals?

Any advice would be great.

Thanks,
Dominic


(Edit...Move back to Auto)

monobrow
New Member

United Kingdom
4 Posts

Posted - Oct 15 2009 :  09:19:08 AM  Show Profile  Reply with Quote
I forgot to mention It uses a DATA H and DATA L to transmit the signals. So essentially a twisted pair.
Go to Top of Page

Aaron Cake
Administrator

Canada
6718 Posts

Posted - Oct 18 2009 :  10:28:54 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
The older unit probably uses something proprietary, the newer unit probably uses the CAN bus. If you can figure out the protocol of the old unit, then you can make a converter to let it speak CAN as the CAN protocol is widely documented.
Go to Top of Page

monobrow
New Member

United Kingdom
4 Posts

Posted - Oct 19 2009 :  07:09:23 AM  Show Profile  Reply with Quote
both use can. It's just some of the messages are spoken in BCD instead of binary. The rest of the messages for putting instructions on the instrument cluster come up ok. So I guess I just need to get something like Easysync and watch the messages being sent to each other and identify the message cluster for the clock signal.

Would you know what PIC would be suitable for this project?
Go to Top of Page

Aaron Cake
Administrator

Canada
6718 Posts

Posted - Oct 20 2009 :  09:21:49 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
I'm very out of the loop with PICs so I'm not sure I'm the right guy to make a recommendation. I believe that the Megasquirt II uses a Motorola processor that supports CAN so it may be the place to start.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Aaron's Homepage Forum © 1995-2020 AARONCAKE.NET Go To Top Of Page
This page was generated in 0.08 seconds. Snitz Forums 2000