Comments on: Sony Unilink

By: wouter a

wouter a — Thu, 17 Nov 2011 10:20:11 +0000

I’m trying to connect my sony head unit to my cars remote and screen.

I have a renault laguna from 2001, the remote is a simple resistor switching device and the screen uses i2c.

I want to connect an arduino barebone board.

What signals do i need to send to the head unit for the remote to function?
What signals do i receive from my head unit which i could send to my cars standard display?
On Which lines i can allready see in your drawings, but the software is the problem now.

thank you for your help, if I get it working you will receive the neccesary files for others with the same problem.

greetings from holland

By: Michael

Michael — Mon, 10 Oct 2011 19:39:59 +0000

Forget Hyperterminal, it’s crap.

Try Bray’s Terminal https://sites.google.com/site/terminalbpp/

Much better and easier to use.

By: Dennis Langley

Dennis Langley — Sun, 09 Oct 2011 21:07:56 +0000

Hi Michael,
Thanks, have read the Readme.txt, had a little success, managed to change the Track No. on the HU display but that was it!
To me it seems like a timing issue? As the HU talks to Hyperterminal ok, I’m wondering if I have a setting wrong in Hyperterminal? I’m using a baud of 115200, any ideas about the ascii setup ie, Line Delay or Character Delay or anything else?
Many thanks
Den

By: Michael

Michael — Wed, 05 Oct 2011 14:20:53 +0000

See the readme.txt file which comes with the firmware zip file. The serial commands are described there.

By: Dennis Langley

Dennis Langley — Wed, 05 Oct 2011 13:04:21 +0000

Hi Michael,
success, my HU is seeing the unilink adapter.
The only problem I’m having is send info to the display from Hyperterminal… not sure how to do it.
I’ve tried sending txt docs with the info in but nothing. It receives info ok from the HU in the form of your ascii letters.
Any ideas?
Many thanks
Den
ps again sorry if this is a bit simple but I’m not a software guy as mentioned before.

By: Michael

Michael — Fri, 30 Sep 2011 19:23:32 +0000

Fuses bytes for ATmega8

HIGH 0xFF
LOW 0x2E

* Brown out level 4.0V
* Brown out reset enabled
* External Crystal/Resonator high frequency, start up 1k cycles + 0ms

By: Dennis Langley

Dennis Langley — Thu, 29 Sep 2011 19:38:26 +0000

Hi Michael,
well I finally managed to get the unilink built and have programmed the AVR using AVRDude and an ISP.
Unfortunately I can’t get it to work, the crystal isn’t running so I’m wondering if I have to burn the fuses in any particular way?
I would be very grateful for any help.
Many thanks
Dennis

By: Dennis Langley

Dennis Langley — Wed, 03 Aug 2011 20:48:59 +0000

Ok thanks Michael, I will see how I get on with your interface first and let you know if I need any help.
Many thanks again,
Den.

By: Michael

Michael — Tue, 02 Aug 2011 09:41:08 +0000

No big deal. The original displays used with the Yampp3 were 2×16 or 2×20. All you need is to flash the controller with the right firmware.

I can compile one for you if needed. It’s just a change in config file.

By: Dennis Langley

Dennis Langley — Tue, 02 Aug 2011 07:51:26 +0000

Hi Michael,
thank you for your quick reply and also for your offer of help.
R4 was the main issue at the moment so I could try and get your interface built.
Regarding the Yampp3usb, I was thinking of integrating it into an old car stereo single DIN unit, so was wondering how difficult it would be to change the display to a 2×16, 2×20 or even slightly longer if I could find one? Unfortunatly I,m an electronics test engineer and not a programmer,so I have very little experience with programming micro controllers so this may be a problem for me? Can the Yampp3 be easily configured for different displays?
Also, are you still using your Yammp and did you find any long term issues with it?
Many thanks again,
Den