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Motors HELP/CHALLENGE: Find car part

Discussion in 'General' started by DXR_13KE, 21 Jan 2012.

  1. DXR_13KE

    DXR_13KE BananaModder

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    Hi guys, i got hold of one of those screens that go on the dash of a Peugeot, like the one on the next video:



    I can not find datasheets or references online for it. I would love to know the pin-out of it and mod it into something, maybe an arcade computer or a nice internet radio system with a rasberry pi.

    Can any one of you awesome people help me?
     
  2. craigp84

    craigp84 What's a Dremel?

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    Open it up and take a note of the numbers on the back on the chips you can read, google them to find out what they do and how to use them.

    Just down to the way the world works these days there's bound to be some you get no results for though. Have a read at the various different blog posts on people who've successfully reverse engineered other screens - from memory the guy that did the blackberry screens made an excellent write up you could follow along with.

    Once you know what kind of processor is in it, next job is to identify the in circuit programmer pins (use the processors data sheet) and where they run to (use a magnifying glass! :) solder on an ICP header (top hint: don't solder it directly to the board, solder short fly leads to the ICP header and solder the fly leads to the board -- the force of connecting / disconnecting the ICP to the board can lead to pcb pads / traces coming away).

    Once you've gone through that, dump the memory of the device. The goal here is to get any possible information from the device to help understand how to talk to different parts of it. From memory the guys who made the opencopter control board from a ps move controller made a good write up on the opencopter wiki for these steps.

    Last tip: publish your progress as you go along and at the beginning when there's not much progress to report, explain the method you'll follow in exploring this. Folks who are interested in this kind of thing may end up paying attention - that's good because they often chip in helpful information when you get stuck or just to help you avoid wasting time.

    Enjoy!

    p.s. there's an accelerometer chip in those (for the inertial navigation feature), you could create a racelogic performance box clone out of the box with that.
     
  3. DXR_13KE

    DXR_13KE BananaModder

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    I think that this device is not that smart... it has 2 connectors, one looks like a power connector, it connects to a distribution board with capacitors and inductors, and the other one has 10 pins. Considering that modern cars use CAN bus i think this connector is for video. I will further investigate as soon as i find a way to open the back of the screen.

    I posted this here because it could be possible for someone from here knew something about these things. It was also as a challenge, i love to find out what things are and what they do and i love to share this passion.
     
  4. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

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    Your best bet for finding the pinouts etc is to pop down to your Peugeot dealer and see if they'll give you the diag (if there is one!) from servicebox.

    It definitely won't have any ability other than a display, looking through servicebox it connects through the stereo to about 10 separate modules to form the telematics system, no doubt interfacing with a load of other systems through CAN bus while it's there.
     
  5. DXR_13KE

    DXR_13KE BananaModder

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    Isn't CAN something like the two wire interface?
     
  6. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

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    CAN is, but it's likely there's no real processing done in the screen, and CAN certainly isn't a full-on data link, it's an information system really, so the rest of the pins will likely be to link it to the infomatics system generating the video feed.
     

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