EmbDev.net

Forum: µC & Digital Electronics Blaupunkt/Audi(??) delta CC Radio remote control protocol


Author: Joachim K. (minifloat)
Posted on:
Attached files:

Rate this post
0 useful
not useful
A forum member had asked me to reverse engineer the control protocol of 
an Blaupunkt/Audi delta CC radio.

nagy_t wrote:
> Hello,
> i am accidentally found this topic by surfing.
> I would like ask your help i would like to reverse engineer the input
> commands of my Blaupunkt Delta CC radio.it has an ST6285 MCU which deals
> with input buttons,it has a remote control input but dont know how can i
> figure out the remote control protocol.
> If you can help me i can send you the schematic.
>
> thank you very much [...]

Some guys in an S2-Forum thread basically have the same question...
https://www.s2forum.com/forum/technical/sound-ice/...
(see also attached files)
Seems the radio is using a OTP microprocessor. I do not think you can 
read out the machine code and reverse it, which would be illegal, too. 
Now, with only the radio, no IR remote control and no OEM steering wheel 
control, I see little chances to reverse the protocol.

A solution like as Flemming Frandsen on google+ posted for his 2011 
Blaupunkt Toronto whatever radio...
https://github.com/dren-dk/BlaupunktVsLacetti
https://plus.google.com/+FlemmingFrandsen/posts/equoBurzQ89
...may not work for such an old thing as the Delta CC.
But he mentions an adapter for old Blaupunkt radios. Hmmm.

Over to you, nagy_t. Do you have more than only the radio?

BR, Joachim

Author: Thomas O. (kosmos)
Posted on:

Rate this post
0 useful
not useful
You need a logic analyzer like this

https://www.aliexpress.com/item/New-Arrival-USB-Lo...

to view/record the communication.

In the mid to late 1990's Blaupunkt often used Panasonic / Matshuhita 
components, e.g. the protocols of the changer control are known, think 
that there are also IR codes on the Internet.

Author: minifloat (Guest)
Posted on:

Rate this post
0 useful
not useful
Thomas O. wrote:
> In the mid to late 1990's Blaupunkt often used Panasonic / Matshuhita
> components, e.g. the protocols of the changer control are known,
Here we have a ST MCU...

Thomas O. wrote:
> think
> that there are also IR codes on the Internet.

On mikrocontroller.net I found this thread:
Beitrag "Blaupunkt Fernbedienungssignale"

There, the RC10 remote protocol is linked... the site was moved to
https://dren.dk/lacetti-blaupunkt.html

I would give this a try.

Author: Joachim K. (minifloat)
Posted on:
Attached files:

Rate this post
0 useful
not useful
Oops, it seems that Flemming Frandsen has only decoded the newer 
Blaupunkt RC10 protocol. But looking at the car and the Audi/BP Delta 
radio production years, something in the end of the 90s, the RC06 would 
be a better fit.

At least they're available on auction platforms like here:
Ebay-Artikel Nr. 232257917983

e.g. you have a steering wheel with resistor ladder buttons, they can 
easily be read in a cheap MCU via ADC and a pullup resistor.

A) This MCU would then just generate the unmodulated signals as if they 
were from the remote. The TFMS 5380 (5xx0 for 38 kHz center frequency) 
has an open-collector output - I'd feed the generated signal the same 
way into the radio. Where does the red net connection go?

B) The more crudes approach is emulating the radio keyboard with 
opto-couplers directly attached to the keyboard matrix, controlled by 
the MCU...

: Edited by User

Reply

Entering an e-mail address is optional. If you want to receive reply notifications by e-mail, please log in.

Rules — please read before posting

  • Post long source code as attachment, not in the text
  • Posting advertisements is forbidden.

Formatting options

  • [c]C code[/c]
  • [avrasm]AVR assembler code[/avrasm]
  • [code]code in other languages, ASCII drawings[/code]
  • [math]formula (LaTeX syntax)[/math]




Bild automatisch verkleinern, falls nötig