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Moncromatic static image to DLPC300 controller

Alexey Petrushin82
Prodigy 10 points
Other Parts Discussed in Thread: DLPC300

Hello, 

I am designing a coustom board based on the DLPC300 controller. The goal is to progect a static monocromatic patter. 

As far as I understand the only way to upload data to the DLPC300 is by using Parallel RGB interface (in eather Parallel RGB 24 bit mode or BT.656 mode). 

My questions are:

- Is it the only way to upload a monocromatic pattern to DLPC300? 

- How can I generate a video signal from a monocromatic static pattern (just an image)?

- If the pattern does not change, should I provide the video signal to DLPC300 continiously anyway. Or it is saved to the SDRAM and then the last fame is displaed also when there is no input signal?

Many thanks

Alex

  • 0
    TI__Genius 12335 points
    Hi Alex,

    You can also load patterns from flash. You could potential load all your patterns into the display buffer, which cam hold 4 24-bit RGB images. Could you describe your use case to us?

    Thanks,
    Clinton
  • 0 in reply to Clinton Rodgers
    Prodigy 140 points

    Hi Clinton,

    My application is a optical network communication, where the DMD is used as light distributing element that defines the communication scheme. The communication scheme does not change over time or changes very reary. It means that it would be sufficient to upload only one image to the DMD which then will be displaed for an extended peropde of time (days). 

    The DLPC300 has two memory interfaces:

    1) SPI interface to FLASH memory which as far as I understans is used only to store the firmware of the DLPC300. This firmware is uploaded every time the board is powered. 

    2) SDRAM interface to DDR SDRAM (I am using MT46H32M16LFBF-5IT by Micron). This memory is used to store bit-planes before they uploadd to the DMD. 

    As far as I understand the only way to load data to the SDRAM is via RGB parallel video intrface. So, to upload am image I will have to send just a single frame to the DLPC300. 

    What happens to this frame? Is it saved to the SDRAM and than displaed over and over again (also when there is no input to the RGB paralle interface)? 

    Are there other ways to upload a single image to the DMD? 

    Thanks 

    Alex