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Lightcrafter DMD not responding to commands

David Zigler
Prodigy 40 points

Hi,

We received a Lightcrafter EVM a couple weeks ago and connected to it via USB, and were able to control patterns using the GUI.  We removed the light engine per the instructional video (Divya) and proceeded to test patterns using a HeNe light source (<1mW/cm^2).  Unfortunately, we saw no pattern change and attempts to use pattern sequences failed to change the image reflected from the DMD.  Commands sent via GUI returned command successful, so we reassembled the lightcrafter.  Now on boot-up there is no splash screen, only a random, fixed binary image.  We can change the current to the LEDs and when we switch modes from Static-->Test the projected image flashes.  When switching to Pattern Sequence mode, the LEDs shut off until we load a pattern sequence and tell it to begin.  We can control the duration, color, and trigger rate of the LEDs and uploading binary images returns "Command Success."  However, no matter what image we use in Pattern Sequence, the same fixed random binary image is projected as there was at start-up.

Firmware Version

DM365: 5.0

FPGA:  2.6.43

MSP:   3.0

Is it possible that the DMD is damaged?

Any help is appreciated,

David

  • 0
    TI__Genius 11325 points
    Hi David,

    Could you take a look through the following thread and let us know if you feel it applies to your situation? If so, we can work through next steps to resolve your problem.

    e2e.ti.com/.../269160

    Thanks,
    Clinton
  • 0 in reply to Clinton Rodgers
    Prodigy 40 points
    Clinton,

    It appears that the problem in that thread was resolved upon reconnecting the light engine, which is different than what we are experiencing. With our LCr there is no boot up screen, but all indications are that the OS loads (indicator LEDs are green, the TCP/IP port opens without a problem, and I can adjust output from the different LEDs of the light engine using the GUI).

    I did notice that with the CW laser, when I switched modes (e.g. Test image to Pattern Sequence) the reflected diffraction pattern flashed momentarily, indicating that perhaps a mirror clocking pulse was passed to and received by the DMD but that the underlying pattern on the CMOS was unchanged.

    David