GM Lan Single Wire CAN Bus Sniffing

[jezzab]

NAV input works! Installed the converter board and now have a VGA port on the side of my head unit lmao. Just plug in the Arduino and hit NAV and your away!

[ozatomic]

NAV input works! Installed the converter board and now have a VGA port on the side of my head unit lmao. Just plug in the Arduino and hit NAV and your away!

Where are the schematics for the converter board?

[jezzab]

Got a MongoosePro GM the other day. Man it makes loggin GMLAN easy with the filters and masks you can run at the same time. I will have a lot more DIC data to post up soon for the newer clusters (which will work with the other ones)

And I will start hunting down a few more GMLAN PiDs

[ZerOne]

Im currently trying to get my SW Can Sniffer software to log the Bus, and evaluate what it sees in realtime...
(I still have issues with Mono C# Serial Port stuff, so I might covert the code to Native Windows C# and use Visual Studio)....

I have some preliminary code that can go through a dumped log (Like the stuff I have posted up), and can process the information
and give status flags as to what data is known, and what isnt....

The hope is to just grab huge amounts of data via logs (Whilst driving) so as we can hopefully find some of the more fun stuff,
and then review it later by running it through the app...
Once reviewing the data, we can try and fill in the gaps by adding some comments, and then upload to the server for others to download and share....
I am working on a search page for the SW Can stuff, but here is the preliminary view page for the worked out SW Can stuff...

view_gmcan.php?gmcan_data_id=10
(Simply change the last digit, from any number from 6 onwards to have a look at the kind of data I am trying to publish)...

Stuff to do...
1) Display the whole data packet, complete with the un-converted header, etc...
2) Add some conversion code for the Data0-Data7 Bytes, so as we can see what the values are in Integer and ASCII formats..
3) Add a search page for finding these suckers, instead of randomly changing the last digits in the URL...
4) Finish off some buggy code that reads through a dumped terminal log, to parse the packet information correctly...

[T2000]

Wow this is a nice read.

*subscribed*

I have the necessary hardware (CANBUS Shield & various Arduino's) ... if you come up with a solid testing protocol then count me in.

I can offer my MY07 VE Berlina and some daily logs to the mix

[jezzab]

Just did a quick test and I can send those reverse park assist packets Matti. But I have reverse cam input and if I put it in reverse it overrides the park assist. if I put it back in neutral it becomes active again.

Sending the packets while in reverse cam mode doesnt flick it over

[ZerOne]

Are you getting any audio feedback from the park assist at all Jezza ?

I remember TMK saying that there was no audio when he was sending the park assist packets, and I was wondering if I should start sniffing the chime functions for this ?

I also remembera long time ago on some forum that someone fitted the factory reverse camera, and they said that when it was enabled, the park assist overlay would disapear ?
However, I do no know if the reverse camera guidelines appeared on his (It may have been a dealer fit option that switches the AUX input on when reverse is selected ???)

I am even thinking that even if there is no display for the park assist when in reverse, that this really isnt a big deal
(as I think everyone would prefer to see the camera display rather than a static pic with lines flashing),
however there should be some audio feedback as well whilst the camera is engaged ????

[jezzab]

Code: Select all

0x10042040 00 00 02 04 45 A5   Left Indicator Off
0x10042040 00 21 02 04 45 A5   Left Indicator on

0x10042040 00 0A 02 01 15 A5   Right Indicator on
0x10042040 00 02 02 01 15 A5   Right Indicator off

0x10042040 00 28 02 02 05 A5    Hazards On
0x10042040 00 00 02 02 05 A5    Hazards Off

0x1004A040 20 00 01 00 00 00   Clutch Out
0x1004A040 20 00 01 00 40 00   Clutch in

0x080080B0 01 07  - Alarm
0x080080B0 01 10  - Approach Lights


Just a few to add if you dont already have them.

PS this flicking between 29bit and 11bit can is doing my head in lol

[tmk]

I was able to send the parking sensor packets, get all 3 bars on the middle, left and right to work. Added it to the GM Lan bible.

It will switch to that screen no matter what gear your in.. Chimes are the controller's responsibility to send via the Chime arbID.

It wouldn't take much to put an arduino based parking sensor project together.. Just the sensors and a SWCAN interface.

TMK

[ZerOne]

Cool ! Great work TMK !!!!
I will have a sniff for the chime packets when I get a chance.
(Looooong weekend coming up, so If the weather holds up I will get a chance to have a good play with the car)..

TMK your right, apart from the chime stuff, we pretty much have all the data needed to create a park assist module
using an ardiuno.
I even have a dealer fit park assist kit (Genuine Holden thing, with color coded sensors and looms that plug straight in to the existing cars loom), but the only problem with this it is it doesn't connect to the GMLan at all.
(It has a cheapy small speaker which you mount underneath the rear parcel tray with an Off, Low, High Volume switch on it).

The good thing about the kit is that it has large A3 sized templates which you use to line up to the bumper for the holes you need to drill.

I will take these templates in to work today and scan them in as high res PDFs and post them up if anyone is interested.