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synchronization kit dlp projector

yac yac
Prodigy 50 points

Hello Everyone

First, please excuse my English

I have a pico projector dlp KIT and I would like to synchronize the afichage: explain
I want to control what I post, or have a feedback signal indicating that the image is displayed.

I do not want to use the map beagle

cordially,

 

  • 0
    TI__Genius 9935 points

    Yac Yac,

    Welcome to the TI E2E DLP & MEMS forum.

    I understand your question as:

    -- I do not want to use the BeagleBoard to set up the Pico Kit v2, but I want to know (have a signal) which tells me when an image (frame) is displayed. Is this possible? How? --

    Is this correct?

    Answer:

    The Pico Kit v2 does not output SYNC signals (AUX connector) in the normal Video mode. It is possible to have the Pico Kit v2 provide an external sync signal ONLY when operating in one of the structured light modes. See Using the DLP Pico 2.0 Kit for Structured Light Applications (dlpa021a), available from http://ti.com/mems. Or directly from here: http://www.ti.com/litv/pdf/dlpa021a

    The problem is that you can configure the Pico Kit v2 for structured light modes only by using the i2c bus commands (see dlpa021a). The i2c bus is available via the AUX connector on the side of the Pico Kit, as well as through the HDMI port (shared with the EDID). However, this requires both an i2c device and software (driver, user interface) to send the i2c commands. The easiest way to do this is to use a BeagleBoard (look through this forum, and do Google searches to find lots of information and problem solving about this method). Some have gotten the Arduino to work, also. There have been very recent threads about this on this forum. Few, if any, have had success with Windows or Linux - though some may have gotten it to work. I don't have the details.

    So, you will have to send i2c commands to the Pico Kit v2 according to the documentation. Then you will be able to utilize the sync signals which the Pico Kit v2 generates in the Structured Light modes.

    Best regards,

    Pascal

     

     

     

     

  • 0 in reply to Pascal DLP
    Prodigy 50 points

    Pascal thank you for your quick response,

    and yes it was my question, so we really can not have an output signal specifying a change of immage, so what can you advise me for my system:
    I have to display image with the pico and take the picture with a camera, and the problem is that once the acquisition of the camera is either too fast or too long, in the end we have time, two, three photo of the same image and lose more!

    cordially

  • 0 in reply to yac yac
    Intellectual 515 points

    If you have some basic programming skills, you could install 'processing' which an excelling programming environment which we have been using in conjuntion with the pico 2.0.  It can be downloaded from processing.org.

    There are many existing interfacing libraries written for it which you could use to possibly take advantage off.  For example, you can use the software to write an image to the projector, and at the same time send a signal to your camera, (via, serial perhaps, or a sound trigger, or you could even write a white square to the screen, and use a lightdependant resistor to trigger your camera trigger??) 

    To change the modes for the projector,  we have a beagleboard, which we initially boot up, with the projector, and then run a small linux script, which sends the i2c commands over the DVI cable) . Then when the Pico has changed to the correct mode, we use an HDMI switch box ($10 from ebay) to switch the signal to the PC.

    hope this is of some use.

    cheers

    Gav