160 Baud Interface

[Ken Kelly]

Darrell, I'm running Peter's 160 baud interface on my '7747. I'm only using
one transistor and two resistors, going into the serial port. Since I didn't
want to cut my original harness, I made a "pigtail" to my '7747 that
interfaces with my original harness (basically, a pair of edge card
connectors handmade from PCB.) I integrated the transistor/resistor combo
into the pigtail since it required +12v as well as ground - and my ALDL
connector doesn't have a +12v coming from it. Now I have the data line and
the ground going to my laptop.

Peter's page has the 1.0 version of his software - I am on his mailing list
and received the 1.5 version almost a year ago, but never had the time to
mess with it. I was laid off a few weeks ago and have plenty of free time
now, so I've been working with it. It works VERY well. It does exactly what
it claims to - read 160 baud ALDL data and LOG it. Mind you, it's RAW data!
It's not converted in any way, but that's what Excel is for. The log files
come out in comma-delimited format, so it's a snap to pull into Excel and
convert all the values for easier tuning.

The page for Peter's serial 160 baud reader is at:

http://www.techedge.com.au/vehicle/aldl160/160serial.htm

You'll probably have to e-mail Peter directly and ask him nicely for the
software, but the hardware is described on the pages. It works very well
when built with just the one transistor and two resistors. E-mail me
privately if you'd like to talk more about it.

"The Third" Ken Kelly

ken73 at ken73.homeip.net

-----Original Message-----
From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf
Of Darrell N.
Sent: Monday, July 16, 2001 6:18 PM
To: gmecm at diy-efi.org
Subject: 160 Baud Interface


All:

I'm trying to get educated about talking to my ECM (747).  I understand
it is 160 baud.  Do I need the PIC based protocol converter (or similar)
to talk to this, or can I just use the transistor or Max232 based level
converter with a laptop?  I tried finding this info on some of the linx on
the GMECM page, but several of the more promising ones are broken -
(FlexScan project, 160 Baud Info, Peter Gargano's page).

And please don't rag on me about reading the archives, I am making an
attempt, but I haven't figured out how to download the dang things so I
can read them at leisure...  Besides, who's got time to go through 20
thousand posts and pan the gold from the gravel...

On another note, there was a few posts about someone who had
uploaded TBI adapter plate drawings a few weeks back, but I can't find
them.  There is no directory called "Incoming" anywhere that I could find
on the FTP site.  Enlighten me...


darrell n
Calgary, Alberta, Canada
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org


----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org