[Diy_efi] Re: J1850 PWM Info Request

[Jeffrey Engel]

Richard,

Gerhard's suggestion is a good one, please take a look
at:

http://www.elmelectronics.com

The ELM320 is all set up to convert OBDII to RS-232.
Someone has done all the hard work for you.

Jeff Engel
--- Gerhard Mueller <gerhard at tricom.han.de> wrote:
> Hello Rick Richard
> 
> you may want to invent the wheel twice. The Elm PICs
> ELM320,
> ELM322 and ELM323 are ready to go for about CAN$
> 15.-
> Get the datasheets from www.elmelectronics.com
> 
> Gerhard
> 
> Am 11-Feb-03 schrieb Rick Richard:
> > Yeah, that's the scantool software I plan to use.
> > What I'm wanting to develop is a device that will
> bridge the RS232
> > serial port with the J1850 PWM bus.  The Oki
> Semiconductor PDF I got
> > contains the physical-layer PWM protocol
> specifications, j1850 frame 
> > structures, and how to implement collision
> detection on the bus.
> > 
> > It looks like I've found everything I need. =) It
> should be a simple matter
> > to program a PIC to communicate on the j1850 PWM
> bus, assemble frames, and
> > then send them to the RS232 as ASCII. From there,
> the freediag scantool will
> > extract the data from the j1850 frame and
> implement the rest of the
> > protocol.
> > 
> >> From: Jeffrey Engel <jengeltx at yahoo.com>
> >> Reply-To: List for general do-it-yourself EFI
> talk <diy_efi at diy-efi.org>
> >> To: List for general do-it-yourself EFI talk
> <diy_efi at diy-efi.org>
> >> Subject: Re: [Diy_efi] Re: J1850 PWM Info Request
> >> Date: Mon, 10 Feb 2003 14:05:18 -0800 (PST)
> >> 
> >> Yeah, I just couldn't remember it earlier.
> >> 
> >> http://freediag.sourceforge.net/
> >> 
> >> HTH,
> >> 
> >> Jeff Engel
> >> --- Rick Richard <saba_apollo at hotmail.com> wrote:
> >>> Do you have the name of it?
> >>> 
> >>> 
> >>>> There's also an Open Source project on
> >>>> Sourceforge.org.
> >>>> 
> >>>> Jeff Engel
> >>>> --- Gerhard Mueller <gerhard at tricom.han.de>
> wrote:
> >>>>> Hello Rick Richard
> >>>>> 
> >>>>> you may want to get the ELM320 PIC from
> >>>>> ElmElectronics.
> >>>>> 
> >>>>> Gerhard
> >>>>> 
> >>>>> Am 10-Feb-03 schrieb Rick Richard:
> >>>>>> I don't understand what the deal is.  I
> asked,
> >>> I
> >>>>> did not demand.
> >>>>>> I thought the purpose of a mailing list like
> >>> this
> >>>>> was to share information
> >>>>>> and resources.  Perhaps you think it is
> >>>>> presumptious of me to assume that
> >>>>>> someone here has this information?  I don't
> >>> think
> >>>>> so, because I've read
> >>>>>> archives of this list where people mention
> >>> owning
> >>>>> the SAE book with the protocol information in
> >>> it.
> >> 
> 
> 
> 
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