• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 27 subscribers
  • Views 426 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP Discovery .55 XGA fast pattern switching

Yicong Wu
Prodigy 105 points

 We recently purchased a DLP Discovery 4100 with a .55 XGA DMD. The basic functionality is fine. We downloaded the D4100 Explorer software, which lets us change the display pattern over USB.

 Our real goal is to cycle the DMD through a set of 10-100 predetermined patterns as rapidly as possible. I have read the 0.55 XGA can switch patterns at ~32 kHz, but I cannot figure out how to do this. I suspect the USB cable cannot send so many patterns so quickly. Can patterns be stored on the controller?

 Has anyone else gotten patterns to switch at >1 kHz? How have you done it?

  • 0
    TI__Intellectual 2265 points

    Yicong,

    The D4100 is capable of fast pattern switching for different applications. You are correct that the USB is not capable of sending patterns at speeds > 1KHz. One suggestion would be to use the memory interface that is available on the D4100. You may attach up to 4GB of memory to the D4100 kit. By storing the pre-determined patterns in the memory, you may pull those patterns at a much higher rate (400MHz clock rate).

     

  • 0 in reply to WYA
    Prodigy 105 points

    This is exactly the solution we are looking for. Could you recommend a part number for the appropriate memory?

    Furthermore, would you mind giving a brief example of how one might access this functionality? In the Extranet that I have access to, I see:

    "DDC4100 Application FPGA Sample Code"

    "DDC4100 Application FPGA Sample Code for GUI use"

    "DLP® Discovery™ 4100 Software Installation"

    but none of these seem to contain a DLL. What software would I need to pull patterns from the memory interface on the D4100?

  • 0 in reply to Yicong Wu
    Prodigy 105 points

    I will repost my followup question as a separate question.