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/82662-controll-delta-cc-radio-through-remote-controller-pin-triptonic-steering-wheel (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
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You need a logic analyzer like this https://www.aliexpress.com/item/New-Arrival-USB-Logic-Analyzer-24M-8CH-MCU-ARM-FPGA-DSP-debug-tool/32810021495.html 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.
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.
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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: https://www.ebay.de/itm/Blaupunkt-Fernbedienung-RC-06H-Compact-Disc-Digital-Audio-Neu-8-638-812-065-FB-/232257917983?_trksid=p2349526.m2548.l4275 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...
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The red line is go to the steering wheel remote controller. I measured that point it shows 4,75V,its seem its I attached the timer characteristic,its shows the requested parameters but i dont know how to solve by this
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