Renault "Tuner List" Head Unit/CD changer hacking - Controls - Page 21

Vicne · 03-05-2006, 07:26 AM

Just a quick poll : which FrontEnd are you using ?
It seems we're at least three to RoadRunner if I'm not mistaken, so I think I'll concentrate on this now, but don't hesitate to share your thoughts if you think other frontends should be considered...

slimmegane · 03-05-2006, 07:26 AM

Quote: Originally Posted by Vicne

Thanks a lot for your help. I may come back to you if I have questions because you seem to have experience in that field.

I will search some info's on how girder work, I will post here ok?

Quote: Originally Posted by Vicne

It looks much more professional than mine. May I post it as a "screenshot" on sourceforge ?

Oh, Yes, I'm flattered

Quote: Originally Posted by Vicne

Did you try changing the track number in the GUI plugin and click "Set" ? :-)

Yes, I've try only one time and seems to nothing appear, but I must to try other time for security.

slimmegane · 03-05-2006, 07:30 AM

Quote: Originally Posted by Vicne

Just a quick poll : which FrontEnd are you using ?
It seems we're three to RoadRunner if I'm not mistaken, so I think I'll concentrate on this now, but don't hesitate to share your thoughts if you think other frontends should be considered...

I'm only using RR because Guino is a GREAT MAN! He has help me more time and I will not betray

Vicne · 03-05-2006, 07:43 AM

Quote: Originally Posted by slimmegane

I will search some info's on how girder work, I will post here ok?

Yes, thanks. That'd be great.

Quote:

Yes, I've try only one time and seems to nothing appear, but I must to try other time for security.

You have to enter a number between 1 and 99 in the "Track Number" field then press "Set", and after one second maximum, the display should be updated...

slimmegane · 03-05-2006, 08:21 AM

I've try this Internet Event Plugin for Girder: http://search.cpan.org/~gbrock/Win32...ent.pm#METHODS

EDIT: I've found interesting info's in WinLIRC homepage http://winlirc.sourceforge.net/ and in the Developer page: http://winlirc.sourceforge.net/developer.html

Girder homepage seems to not work today, I hope this is the correct way.
Thanks.
SLM

pippolippi · 03-05-2006, 11:02 AM

Finally I got it working. It seems that the problem is that in my program I didn't set the parity (I thought that the default was even while it is no parity)

This is the circuit I used (though the HU on detection still isn't reliable, when I disconnected it from the HU it still thought it was on, it worked flawlessly while connected). I think that it may work even without the transistors (since my problems were in the program, not in the interface)
EDIT: I tried without the transistors, it doesn't work.

The components are what I had available, so they may be replaced (probably the 2n2222 would work equally well as the bc337).

Attached is the python program, now with all serial parameters explicitly defined

BEWARE this is not java, so it's just 160 lines of understandable code in a (shock horror) single file

It needs a python interpreter (obviously) and pyserial. I had to add the txt extension (this forum doesn't accept python files), and you invoke it either passing the number of the serial port, e.g.

Code:

python cdc.py 1

or the name of the serial device

Code:

python cdc.py /dev/tty/USB0

If you want verbose output just change the line

Code:

  self._showdebug=0

to

Code:

  self._showdebug=1

Now I'll just have to find an usb card with spdif output, the blue connector (I used faston for testing) and I'll probably write a freepascal version of the program (so that'll be native under at least windows and linux, don't know if the serial library I'm using works under mac os X, don't know if pyserial does either).

pippolippi · 03-05-2006, 12:07 PM

Quote: Originally Posted by pippolippi

Finally I got it working.

Well, my quest for a suitable circuit hasn't ended yet

I have an inverter to power my laptop in the car (a belkin ac anywhere 140w) and as soon as I connected the laptop to the inverter, with the interface connected, the laptop shut itself off. I thought I fried my laptop, but luckily that wasn't the case: after removing the battery (and the serial port) it went back to life.
So I thought I fried the serial port, but, no, it's working (phew), but as soon I connect the serial port to the interface it disappears (i.e. it doesn't exists anymore, like the usb adapter is freaking out).
I'll probably have to put optocouplers in both directions (and for the spdif too) if I want to use the inverter.
Something like this (you'll have to visit this page first to agree to the GPL license)

slimmegane · 03-05-2006, 12:39 PM

Quote: Originally Posted by Vicne

You have to enter a number between 1 and 99 in the "Track Number" field then press "Set", and after one second maximum, the display should be updated...

I can change only tracks, the CD not change

Vicne · 03-05-2006, 12:50 PM

Quote: Originally Posted by pippolippi

Finally I got it working.

Great ! Welcome to the club :-)

Quote:

This is the circuit I used (though the HU on detection still isn't reliable, when I disconnected it from the HU it still thought it was on, it worked flawlessly while connected). I think that it may work even without the transistors (since my problems were in the program, not in the interface)

Yes, without the transistors, I think it will highly depend on the values of the resistors you choose, the internal pull-up of the HU and its threshold. It can maybe work with a bit of luck.

Quote:

BEWARE this is not java, so it's just 160 lines of understandable code in a (shock horror) single file

:-)
I guess understandable is a relative concept :-)
But as I said from the beginning, I know Java is like a hammer to kill flies in this context and I hope more lightweight implementations will come that I'll be able to use without hogging my system (and other's).

Do you want to host your version in another module on the SourceForge project too ?

Vicne · 03-05-2006, 12:51 PM

Quote: Originally Posted by slimmegane

I can change only tracks, the CD not change

Yes, CD number update isn't done yet. In fact, as this information isn't part of PLAYING frames, I'll have to detect changes to this field and send the few frames needed to simulate CD change. Problem is it will probably produce a muting for a few seconds.

pippolippi · 03-05-2006, 01:02 PM

Quote: Originally Posted by Vicne

I guess understandable is a relative concept :-)

Well, since it's a simple communication I find it more understandable if it is in a single, short, file, instead of being scattered in 50 classes in 200 source files

Hope you'll appreciate that the program is rather simple, even if you don't grok python.

Quote:

Do you want to host your version in another module on the SourceForge project too ?

feel free to upload it.

Now a question, as you see from my other post my problems aren't over yet.
Are you powering your car pc with an inverter?
If so, are you having the same problems I had or you just tested the circuit with another pc?
(yes, I know you've already connected the spdif output of the car pc, but maybe there's an isolation transformer, either in the pc or in the HU input, if the latter an optocoupler wouldn't be needed for spdif. The fact that spdif connector in the HU has a different gnd seems to confirm this possibility).

Vicne · 03-05-2006, 01:19 PM

Quote: Originally Posted by pippolippi

Well, my quest for a suitable circuit hasn't ended yet

I have an inverter to power my laptop in the car (a belkin ac anywhere 140w) and as soon as I connected the laptop to the inverter, with the interface connected, the laptop shut itself off. I thought I fried my laptop, but luckily that wasn't the case: after removing the battery (and the serial port) it went back to life.
So I thought I fried the serial port, but, no, it's working (phew), but as soon I connect the serial port to the interface it disappears (i.e. it doesn't exists anymore, like the usb adapter is freaking out).
I'll probably have to put optocouplers in both directions (and for the spdif too) if I want to use the inverter.

Jeesh, scary... Can it be a grounding problem ? Do you have the problem even if you don't connect the HU side ?

Quote:

Something like this (you'll have to visit this page first to agree to the GPL license)

Yes, opto-isolation is always a good precaution. In this case however it would need 3 optocouplers (Rx/Tx/Remote)...

Vicne · 03-05-2006, 01:47 PM

Quote: Originally Posted by pippolippi

Well, since it's a simple communication I find it more understandable if it is in a single, short, file, instead of being scattered in 50 classes in 200 source files

Hope you'll appreciate that the program is rather simple, even if you don't grok python.

Yes, undoubtedly, it's rather straightforward.
I hope you won't come into concurrency problems if you have to both retry a frame and receive another one for example, but future will tell.
In my case, there are already about 15 classes that simply represent the kind of frames that can be received or sent. Add the threads for listening and sending frames, a watchdog running every second, the finite state machine to store the emulator status (BOOTING/PLAYING/PAUSED/CUEING/etc), a few utilities for dumping pretty hex debug logs and the plugin architecture... Maybe not 200 files but definitely not far :-)

But I admit python is particularly clear and concise.

Quote:

feel free to upload it.

OK. I'll do it as soon as you have tested it.

Quote:

Now a question, as you see from my other post my problems aren't over yet.
Are you powering your car pc with an inverter?
If so, are you having the same problems I had or you just tested the circuit with another pc?
(yes, I know you've already connected the spdif output of the car pc, but maybe there's an isolation transformer, either in the pc or in the HU input, if the latter an optocoupler wouldn't be needed for spdif. The fact that spdif connector in the HU has a different gnd seems to confirm this possibility).

You are right, maybe I should describe my setup a bit.
The carPC isn't running on an inverter. It has a M1-ATX as DC/DC converter and has worked with SPDIF (and the actual CDC for Data) for nearly a year now without a single problem (but SPDIF GND is not connected to the common GND of the PC.
BUT :
All the hacking tests I've done on this project are not using the carPC. I'm using a 1GHz PIII desktop PC powered on mains (220V). The only precaution I take is to always touch both the PC case and the HU at the same time before connecting the adapter to avoid ESD. The adapter has continuous ground from the DATA GND PIN of the HU to the GND pin of the DB9.
And I haven't had such a problem until now.

Now I don't think connecting the adapter to the car PC can make things worse, except for a ground loop maybe...

Slimmegane, can you describe your setup a bit ?

slimmegane · 03-05-2006, 01:54 PM

Quote: Originally Posted by Vicne

Slimmegane, can you describe your setup a bit ?

I've Epia 10000 and M1ATX, but my spdif is from soundblaster audigy 2 nx (usb 2.0 port) I've connect the ground to the rs232 ground and the pin 15 of mini-iso to the ground of the PC, all PC ground is the same of CAR Ground.

I think that the problem of pippolippi is the ground that is more different from PC and car.

slimmegane · 03-05-2006, 01:57 PM

About the girder and java try to read someone in the girder forum http://www.promixis.com/phpBB2/index.php I think you can use the LUA plugin to send simple command to Girder or Internet Event, now I'm wait an answer from girder forum