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DLP Discovery 4100 memory

NinaR
Prodigy 20 points

Hello,

I am thinking about purchasing a DLP Discovery 4100 Development Kit  with a .55 or 0.7 XGA DMD. I need patterns to switch really fast (10-100 µs) and read that this is not possible using only the development kit because USB is not capable of sending patterns at speeds > 1KHz. My Design House sells a Controller Suite to store patterns in a memory but it is pretty expensive. For my application I do not need a whole film to be stored in a memory - two binary patterns would be sufficient. Is it possible to store this small amount of patterns on some kind of internal memory of the kit? Another problem is the triggering: The patterns have to be displayed at a predefined moment (I only got a range of a few µs) to fit the rest of the experiment. A controll of the picture to be displayed via PC could be too slow. Is there a way of triggering the patterns with an electric signal (for instance with a function generator)?

Thanks, Nina

  • 0
    TI__Guru 54320 points

    Hello Nina,

    Welcome to the DLP-section of the TI E2E Community.  Thank you for you interest in a DLP Discovery 4100 Development Kit. 

    To answer your question, the Kit hardware is capable of switching at the speed you desire, but not through the USB interface alone.  With an XGA the hardware is capable of about 22 Kbfps (bfps = binary frames per second) for Global mode (whole image switching at the same instant).  Judging from what you wrote I think you will want to operate in Global mode.

    In order to achieve this kind of speed you will either need to purchase a ready made solution such as you mentioned, or use a memory stick in the memory slot and write your own FPGA code to handle the memory to store patterns sent over or receiving patterns through one of the high speed external interfaces and sending data to the DDC4100.  You would also then be able to build your own trigger into the code if you build your own code.

    I hope this is helpful

    Fizix

  • 0 in reply to Fizix
    Prodigy 20 points

    Thank you, that was what I needed to know.