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Compiler/DLPDLCR2010EVM: How to project a single image or video from the computer, not the whole computer screen via HDMI port?

Prodigy 30 points

Replies: 3

Views: 727

Part Number: DLPDLCR2010EVM

Tool/software: TI C/C++ Compiler

Dear TI Employees,

I could connect my computer to DLPDLCR2010EVM via HDMI connection and project my screen on a surface. However, in my research, I have to display a single image from my MATLAB program, not the whole computer screen. Please show me how to do that.

There is a USB Port on the device, so I tried to connect it with my computer. But nothing happened. I thought that it maybe the port for I2C connection for image or video display programming. Therefore, I read the "DLPC3430, DLPC3435, DLPC3433, and DLPC3438 Software Programmer's Guide" but I could not find any software or programming language for controlling it.

Please give me some instruction!

Thank you,

Sincerely,

Long

  • Hello Thanh and welcome to the E2E forums,

    In order to display individual images you could load the images into the flash memory and then display them by using splash screen commands. As per the LightCrafter Display EVM GUI Tool User's Guide the following commands are used to set the display image:

    • Read Splash Screen Header (0x0F)
    • Write External Input Image Size (0x2E)
    • Write Image Crop (0x10)
    • Write Splash Screen Select (0x0E)
    • Write Input Source Select (0x05)
    • Write Splash Screen Execute (0x35)

    More detailed commands for controlling the splash image are in the DLPC343x programmers guide you mentioned earlier. Using this technique you would be limited to the number of images that can fit into splash memory. All of this communication can be done using USB or I2C commands. I would recommend creating a batch file and testing it by uploading it in the Lightcrafter GUI under advanced mode. From there you can figure out how to implement the proper communication in Matlab.

    Alternatively, you would have to make a Windows program that outputs a full-screen image to the Lightcrafter. 

    Let me know if you have any further questions,

    Kyle

  • In reply to Kyle Rakos:

    I have one more question,

    Can you explain me this code that I saw on the "DLP® LightCrafter™ Display EVM GUI Tool User's Guide"

    #####################################
    # SET UP SPLASH SOURCE #
    #####################################
    # Write: ImageCrop
    W 36 10 00 00 00 00 00 05 D0 02
    # Write: DisplaySize
    W 36 12 80 07 38 04
    # Write: InputImageSize
    W 36 2E 00 05 D0 02
    # Write: SplashScreenSelect
    W 36 0D 03
    # Write: InputSourceSelect
    W 36 05 02
    # 100 ms delay
    W 36 DB 64 00
    # Write: ImageOrientation
    W 36 14 00
    # WRITE LED CURRENT
    W 36 54 07 01 07 01 07 01
    # Write: WRITE LED ENABLE = 7. DISABLE = 0
    W 36 52 07
    # Write: SplashScreenExecute
    W 36 35

    What is the "36" parameter represent in the commands?

    Thank you,
  • In reply to Thanh Long Tran:

    Hello Thanh,

    This is the address corresponding to the chip address of the controller.

    Thanks,
    Kyle

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