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'[EE]: CAN'
2009\04\24@094912 by Luis.Moreira

picon face
Hi All,
A friend of mine as asked me to have a look at a couple of car seats he
got for is "project car", which are all motorised and have a CAN Bus
embedded for communications between the seat controller and the motor
controllers. The seat's motor for movement forward and back is optional
and he asked me if I could clone one of the existing motors and
controller to use for that function. They were manufactured by Recaro
the model is DSE and date of manufacture is 1997.
I manage to interface into the CAN bus and I can read all the messages
on the bus I even manage to send messages to some of the motors by
mimicking the data sent by the controller. But without knowing the
specifications of the messages being sent is very difficult to develop a
clone that will do the job. I manage to figure out the message
identifiers, and I even found which nodes are receiving and answering
back, but without the message implementation structure, is getting
difficult to work out how to control the motors properly.
I was wandering if anyone would have or know where or how I could get
this info. I am not looking for the CAN message specification, as I know
that, but instead I am looking for info on how the data part of the
message is structured.

These motors have a built in controller with CAN interface and were
built by Bosch, I wander if they are standard and used somewhere else...

We already tried Recaro but, as not many of these seats were made do to
complexity and cost, they claim not to have that information anymore.

Best Regards
               Luis      



2009\04\24@120703 by M. Adam Davis

face picon face
There is no single specification for the message structure.  Each car
company has their own format that they often expect vendors to follow.
But even within a particular manufacturer's format, each module has
its own data format.

If the seat supplier doesn't know (or won't tell you) and the auto
manufacturer won't tell you, then the best you can do is pick it apart
as you have been doing.

Sorry I can't be much more help than that.

-Adam

On Fri, Apr 24, 2009 at 9:47 AM, Luis Moreira <spam_OUTLuis.MoreiraTakeThisOuTspamjet.uk> wrote:
{Quote hidden}

>

2009\04\24@122740 by Funny NYPD

picon face
Maybe you can jump over the CAN part, and just re-use the motor driving part of circuit, life would be much easier and happier.

Funny N.
Au Group Electronics, http://www.AuElectronics.com




________________________________
From: M. Adam Davis <.....stienmanKILLspamspam@spam@gmail.com>
To: Microcontroller discussion list - Public. <piclistspamKILLspammit.edu>
Sent: Friday, April 24, 2009 12:02:03 PM
Subject: Re: [EE]: CAN

There is no single specification for the message structure.  Each car
company has their own format that they often expect vendors to follow.
But even within a particular manufacturer's format, each module has
its own data format.

If the seat supplier doesn't know (or won't tell you) and the auto
manufacturer won't tell you, then the best you can do is pick it apart
as you have been doing.

Sorry I can't be much more help than that.

-Adam

On Fri, Apr 24, 2009 at 9:47 AM, Luis Moreira <.....Luis.MoreiraKILLspamspam.....jet.uk> wrote:
{Quote hidden}

> -

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