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MBMC Request

Paulo Marques9
Prodigy 30 points

Hi,

I need 2 MBMC sequences:

7 x 1bpp G + 1 x 1bpp R + 1 x 1bpp B + 40 x 1bpp G  with Exposure = 16666us

7 x 1bpp G + 1 x 1bpp R + 1 x 1bpp B + 40 x 1bpp G  with Exposure = 20000us

The sequences are 49 1bpp frames, with all green frames, except for frame 8 and 9 which are red and blue respectively.

The only difference between the sequences are the exposure times which is 16666 for the first sequence and 20000 for the second sequence.

BTW, when configuring a standard pattern sequence, we have the "exposure" and "trigger period" settings. The exposure is always at least 330us below the trigger period, but it is the trigger period that sets the frame rate, right?

The exposure times I'm requesting should produce a frame rate of 50Hz and 60Hz. If that is not the case, then I need the exposure times to be reduced by 330us so that the actual period is 16666 and 20000, with the exposure being as large as possible inside that frame period.

Thanks,

  • 0
    TI__Intellectual 2305 points
    Hi Paulo,

    We received your request, and we will be providing these 2 MBMCs in the near future.

    Regards,
    A214529
  • 0
    TI__Genius 11375 points

    Hi Paulo

    These sequences should be posted at the following link within the next 24 hours.

    http://software-dl.ti.com/dlp/embedded/catalog/dlp3000/dlp3000mbmc.html

    Thanks,

    Clinton

  • 0 in reply to Clinton Rodgers
    Prodigy 30 points
    Hi, Clinton

    I'm having a few problems with getting the projector to run this sequence.

    First, I guess you didn't read my entire post, because even though I was requesting an exposure of 20000us and 16666us, what I really wanted was to be able to have trigger periods of 16666us and 20000us. That is ok for now as I can use the 16666us exposure to run the system with a trigger period of 20000us (although it would be better to have a longer exposure in this case).

    My biggest problem now is that, even though I think I've read all the documentation available, I can't figure out the sequence of commands I should send programmatically to the projector to make it display this sequence.

    From what I could understand, what I need to do is:
    1 - send "Current Display Mode (0×01 0×01)" to select Pattern Sequence Display
    2 - send "Enable Custom Sequence (0×0A 0×01)" with start 0 and "number of vectors" 53 (according to the readme file)
    3 - send "Trigger Output Setting (0×04 0×04)" to have the projector output trigger signals
    4 - (?) send "Pattern Sequence Setting (0×04 0×00)" to select trigger and exposure times
    5 - send "Load Custom Sequence Image (0×0A 0×00)" and pass the contents of the ".bin" file from the MBMC zip file you provided
    6 - send "Pattern Definition (0×04 0×01)" for each pattern, to send all the bitmaps for all the frames
    7 - send "Start Pattern Sequence (0×04 0×02)" to start the sequence

    So my questions are:
    - why is this not working?
    - do i need to explicitly upload the "INSERT_1BPP_BLACK_PATTERN" described in the readme file?
    - when loading the patterns, should I put them in the sequence described in the Table-1 of the readme file? For instance should I upload my pattern 17 as pattern number 0 to the projector?
    - I've read somewhere that the projector "forgets" that it is in mbmc mode when it changes display mode (for instance, when switching to hdmi input). Do I have to send the patterns again or just sending the "Enable Custom Sequence" and "Load Custom Sequence Image" is enough?

    Also, I can't seem to be able to make the projector run the sequence using the DLP LightCrafter Control Software (v5.0.0). The sequence is loaded correctly as I can see all the patterns displayed correctly in the "MBMC Sequence Settings" tab, but I go to the "Sequence Settings" tab and press "Start" the sequence is not displayed correctly.

    Regards,