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Thread: Valentine One to a PC

  1. #321
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    Well, after reading all the threads and what not, I believe I have figured out the circuit that is used with the USBmod3 chip. I still need to buy the chip but I got all the other parts. I just need to hook it up, build the test circuit and see what happens.

    Jay

  2. #322
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    any updates on this? I am just curious.

  3. #323
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    I was looking into this a year ago. I still have the parts on my desk, but never got round to testing things out. I may be restarting this shortly. Ill keep you updated.

  4. #324
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    Quote Originally Posted by CityFan86 View Post
    I was looking into this a year ago. I still have the parts on my desk, but never got round to testing things out. I may be restarting this shortly. Ill keep you updated.
    Awesome; I'm still totally interested... My CarPC is on hold right now while I pay bills; but I already have the PC portion ready to go; just need an LCD and amps/speakers... It'd be nice to integrate the ValentineOne into the PC...

  5. #325
    Maximum Bitrate zPilott's Avatar
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    Here is the circuit I used for my adapter. It has a little bit more hardware on it than some of the other designs, but all the extra stuff is there to protect from unwanted mute presses when starting up (power going off/on/off/on, etc.).
    Attached Images Attached Images  

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

  6. #326
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    Interesting. How exactly does the protocol from the V1 get handled by the USBMOD chip? That chip expects a RS232 protocol and it seems the timing from the V1 would not match the RS232 spec.

    I was planning on using a microchip that would read the V1 protocol (at the correct V1 timing) and then output it at RS232 timing. This would also allow for other functions (like mute or change mode) to be implemented as the chip would do the processing of the pc commands, but if thats not needed to just read data...

  7. #327
    Maximum Bitrate zPilott's Avatar
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    I ran the USBMOD3 at 19200 7N1. Bit 0 should be 0, 7 should be 1, bit 3 is your data, and the other bits are garbage.

    The car is noisy, and you will get some bad data. You don't want to display anything unless you get the same packet two times in a row.

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

  8. #328
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    FYI, I have my prototype setup on a breadboard. Im waiting on a few parts to arrive before I can continue. In the mean time I have designed a PCB using Eagle that mimics my prototype, so depending on how my testing goes I should have a fully built PCB version working shortly after. The PCB was also designed to fit into an enclosure I have in mind.

    Initial version is going to be serial and read only (no mute functionality). I want to ensure I can read the data reliably before I try muting and/or changing modes, but the PCB does have room for the extra parts anticipated.

    Im not going with any design that has been done before. As zPilott stated the other method produced a lot of garbage bits and potentially bad data. While that works, I want a method that does as it is supposed to and just report the data accurately every time (at least that is the hope )

  9. #329
    Maximum Bitrate zPilott's Avatar
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    To be clear, my method is 100% accurate. When powering the V1 with a bench power supply there was 0 errors. The problem is the car. If you hook the V1 up to a clean power supply then maybe you won't get glitches, but if you are making something that is going to be used by people that are using the V1 hardwire adapter, or cig adapter they WILL have noise coming from the V1, and the display (hardware or software) must handle it.

    |V1 Virtual Display|

    Hard work often pays off over time, laziness always pays off right now.

  10. #330
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    Just a status update, I have the V1 data being read and transmitted via serial to my pc!

    All that is transmitted is 32 bytes of data (1's & 0's), each representing an on or off for a V1 led. I am using a new method that utilizes a small programmable microchip. No transistor level conversion of the V1 to RS232 data is used. This way I actually read the protocol from the V1, then output it whole down RS232. I have the option of outputting it as is (which I currently am doing) or "translating" it to something potentially more user friendly, but I dont really see a benefit of this.

    How much interest is there from people wanting me to produce and distribute these?

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