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DLPC3478: DLPC3478 How to Splash Pattern without Internal Pattern with trigger

John Bayramian
Prodigy 60 points
Part Number: DLPC3478
Other Parts Discussed in Thread: DLP3010EVM-LC

Hello,

We are trying to project a pattern (Solid color) with DLPC3478 with specific amount of time. Exposure time minimum 10 ms maximum 100 ms. Also we want to set trigger output without loading internal pattern because we use interal patterns for something else. Also we want to project pattern only once after command has been sent. Because if connection with dlpc lost, pattern projection should stop. What can we do?

Best regards,

Bayram

  • 0
    TI__Expert 8330 points

    Hello Bayram,

    Welcome back to the E2E forums and we hope to assist you with your questions.

    Please consult the DLPC3478 programmers guide for more information. https://www.ti.com/lit/pdf/dlpu075

    You should find relevant commands that will help you achieve the various objectives you have listed. For example, section 3.4 light control commands should help setup the pattern itself as well as trigger control and there are other commands like the "Write Operating Mode Select 05h" that will help setup a solid color pattern. 

    Are you using the DLP3010EVM-LC? If so you should be able to configure and test command setups in the GUI as shown below.

    Regards,

    Alex Chan

  • 0 in reply to Alexander Chan
    Prodigy 60 points

    Hello Alex,

    We are currently using a custom card, but we can send commands with the EVM GUI. We control it through the DLP API in C++ to project a pattern.

    We need a hardware trigger, so we can use three different modes: Internal Pattern, External Pattern, and Splash Pattern according to DLPC3478 programmers guide.

    We don't want to use Internal Pattern right now because there are other patterns loaded in the flash. So, we have two options left: External Pattern and Splash Pattern.We are not using External Pattern because the necessary connections are not available. Therefore, we are currently only using Splash Pattern. When we set the operating mode to Splash Pattern and send the "Write Splash Screen Execute (35h)" command, we reflect the splash pattern.

    Our goal is for this pattern to stop after reflecting it once. Currently, we send a separate command to stop it. Is there a way to reflect the pattern once without sending an additional command?

    Regards,

    Bayram

  • 0 in reply to John Bayramian
    TI__Expert 8330 points

    Hi Bayram,

    There is no command to send the splash screen only once. 

    These are the following settings and features for splash patterns.

    Regards,

    Alex Chan