Odp: OBD II chip??????

[Marek Skrzypiec]

Look at www.obdii.com
There are some infos
Marek
-----WiadomoϾ oryginalna-----
Od: Ara Bedrossian <ara.b at ix.netcom.com>
Do: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Data: 30 wrzeœnia 1999 20:33
Temat: Re: OBD II chip??????


>hmmm, I'm at work right now, but my senior project for school was building
>an OBD II scantool.
>
>First off, there is no one chip that will convert J1850 vpw signals to
>RS232.
>
>This is what you will need.  a J1850 vpw transciever (motorola mc33390,
>motorola mc68hc58, or other equivalent), a microprocessor and a rs232
signal
>converter like the maxim232's or somptin like that.
>
>That is not all, you will have to write some code to controll the
>transciever and have it process the information from the j1850 to the rs232
>port and vica-versa.  it took me a Hell of a time just finding information
>on how this stuff works.
>
>the best way to get a start is going to www.sae.org and getting the HS3000
>book with has a wealthy amount of information.  it is around $80.
>
>if you are interested email me and I can discuss it furthure.
>
>I have a working prototype write now, I am planning on designing a board
but
>have not had the time yet so far.
>
>Ara
>
>----- Original Message -----
>From: Dave Hempstead <dave_hempstead at hp.com>
>To: <gmecm at efi332.eng.ohio-state.edu>
>Sent: Thursday, September 30, 1999 10:48 AM
>Subject: OBD II chip??????
>
>
>> Here is a strange question:
>>     Does anyone know of a chip which will sit on the J1850 OBD-II
>> wire, handle the VPW protocol, and 'convert' it to standard
>> RS-232 type signals, passing the data bytes back and forth????
>>
>> Any pointers will be appreciated,
>> Dave Hempstead
>> dave_hempstead at hp.com
>>
>
>