[Diy_efi] Re: J1850 PWM Info Request

[Rick Richard]

Yes, I have had the datasheets before my first post on this thread.
Call it artistic touch, if you want.  I'm ready to reinvent the wheel
just to make it my own.  The reason I do things myself is because I
enjoy the learning process.  In the last 24 hours I've learned a great
deal about the j1850 protocol!  =)

Thanks

>
>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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