Thread: 2006 Audi A3 2.0 TDI. Symphony II PCCAR : OEM Indash Screen Prototype. Full pics!!

You won't trust me but I thought to start search for this yesterday.

I will need to paint like original palstic like you.

But as you said, I understand that it is hard to find.

I will ask on different forums.

We keep informed.

Looking good! Quite a project you have there. I am jealous of your MTron ;-]

I am now trying to hack lilliput microcontroller inder to replace it by a PICBASIC one with my own software.











I have scaned some signals but I am not able now to understand what they mean.

For exemple :



and



These signals are "FLIP UP" and "FLIP DOWN" buttons.

Looks like SERIAL protocol at 4800 bauds...

Really need help.

why do you want to redo the micro controllers?

Originally Posted by pdegameplayer

why do you want to redo the micro controllers?

First, the firmware of the first generation models is really bad. After 15 minutes of work, the unit frozen and I can't close it anymore. After investigation, some data's were corrupted in the 24C02 EEPROM. See HERE

It happens on 2 differents unit I had (have 3 for total).

secondly, I burnt the same outpout pin of the all 3 µmicrocontrollers during tests (bad wiring!!!).

I was looking for broken units for weeks but none has one to sell.

And then, I would like make My own firmware in order to the screen makes exactly what I want for open/close/AV-AUDIO inputs-outputs...

But Now, I find it really hard.

I have now hacked all signals beetween the screen and the main board. But I can't reproduce them with my PICBASIC. I really don't know how I will find a solution and I haven't found anyone who could help me....

Here is a synthesis of signals :

Originally Posted by coucouillu

First, the firmware of the first generation models is really bad. After 15 minutes of work, the unit frozen and I can't close it anymore. After investigation, some data's were corrupted in the 24C02 EEPROM. See HERE

It happens on 2 differents unit I had (have 3 for total).

secondly, I burnt the same outpout pin of the all 3 µmicrocontrollers during tests (bad wiring!!!).

I was looking for broken units for weeks but none has one to sell.

And then, I would like make My own firmware in order to the screen makes exactly what I want for open/close/AV-AUDIO inputs-outputs...

But Now, I find it really hard.

I have now hacked all signals beetween the screen and the main board. But I can't reproduce them with my PICBASIC. I really don't know how I will find a solution and I haven't found anyone who could help me....

ill tell you what i go to itt-tech and i have a very good electronics teacher there i will ask him to decode the signals for you and then i will give you his email address in case you have any more questions ok?

my grandpa was an electronics engineer before he retired so he might know also.

woot for double posting!

ok my grandpa says he need the following data
1. what is the +VC and -VC
2. what is the time lapse for each square?

im referring to the following image!

Originally Posted by pdegameplayer

woot for double posting!

ok my grandpa says he need the following data
1. what is the +VC and -VC
2. what is the time lapse for each square?

im referring to the following image!

Thank you pdegameplayer for your help.
Sorry, I broke the picture link by deleting the first one in hosting and updating it with new one. Please EDIT your last post.

I would be pleased to have the address of your teacher.

1. It is -VC=0V , +VC=+5V. It is connected to PIN #11 (RXD) of the SM89516 µController.
I joined the Datasheet.
These signals are scanned from a bus beetwen 2 µControllers SM89516 communicating together.
I haven't given the scans of the second bus but I guess they should be like an aknowlegment. These two SM89516 runs with a XTAL=12MHZ and my µController PICBASIC has got a XTAL=20MHZ

2. Each square is 75µS each. I updated the graphics.

Thanks.

Brice.