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DPP1505 Splash Screens

Hi,

I have DLP Pico Projector Development Kit which I want to use to create texture on solid surfaces in order to have more structure for 3D vision. I was wondering if there is a relative simple way to use custom splash screens. In my set-up it is not possible to connect to HDMI, so I'd like to load a few patterns and be able to select them via I2C commands.

Can anyone help me?

Steven

  • Steven,

    Welcome to the DLP&MEMS E2E forum.

    There is no provision for user-defined patterns except via the HDMI video input. However, there are internal patterns which are available for structured light applications. Please refer to the documens

    DLP® Pico Chipset v2 Programmer’s Guide (Rev. A)

    http://www.ti.com/litv/pdf/dlpu002a

    Using the DLP Pico 2.0 Kit for Structured Light Applications

    http://www.ti.com/litv/pdf/dlpa021

    Both of these documents can be reached from http://ti.com/mems.

    See especially section 1.3.6 on page 27 of the Programmer's Guide.

    Best regards,

    Pascal

  • Thanks,

    So there isn't any way to load custom patterns or splash screens in the DLP 0.17 HVGA Chipset? Even when I build my own custom circuit board for the chipset's components?

    Kind regards,
      Steven

  • Steven,

    It can be done - but the patterns can not be loaded and stored inside the DLPC100, the digital controller for the DLP1700 DMD. The patterns must be supplied as digital RGB data at the 24 bit parallel input port of the DLPC100, along with the digital HSYNC and VSYNC signals. This data must be formatted for the desired resolution and timing (within the constraints of the DLPC100).

    Please see the data sheet for the DLPC100 at http://www.ti.com/lit/gpn/dlpc100. This document can also be reached by first going to the website http://ti.com/mems and clicking on DLP Technology, then select 0.17 HVGA Chipset, then click on DLPC100.

    The DLP1700 DMD is controlled by the DLPC100, in conjunction with the configuration EEPROM, and the SDRAM memory. Figure 1 of the DLPC100 data sheet shows a system block diagram. The pattern storage, generator can either be substituted for the DVI Receiver function, or can be supplied through the DVI receiver from a source which can supply DVI formatted digital video.

     Looking at the data sheet should make this clearer.

    Best regards,

    Pascal

  • Ok, I understand. I was studying the datasheet and the picokit schematics. Can I use the auxiliary connector's PDATA0-PDATA7 for a BT656 video signal?

    Kind regards,
      Steven 

  • Steven,

    The Pico Kit V2 auxiliary connector does not support the PDATA lines. The DLPC100 input port does support both RGB888 and BT656 format inputs. However, on the Pico Kit V2, the DVI input interface is tied to this port.

    See the DLP Pico Projector Development Kit V2 User's Guide ( http://www.ti.com/litv/pdf/dlpu003 ). This shows the Pico Kit V2 usage and configuration. See especially pages 10-11.

    Of course, with the DLP 0.17 HVGA Chipset you can do exactly as you suggest.

    Best regards,

    Pascal

  • Ok, so I'm forced to use the HDMI port. I am now thinking about using an extra FPGA to process pattern pixmaps and send them over DVI. I'm afraid that is going to be the only option.

    Kind regards,
      Steven