• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 31 subscribers
  • Views 419 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLPLCR50XEVM: Pattern Output

Mark Philip Felipe
Genius 10870 points
Part Number: DLPLCR50XEVM
Other Parts Discussed in Thread: DLPC900

Hi Team, seeking your assistance. I have a customer trying to send me some observations on their DLP board. 

with video pattern mode, I showed figure with triangle and rectangle.
with 450us exposure and 450us dark time, stripes appeared.
different stripes patterns appeared with different exposure and dark time.

with video pattern mode, connected with HDMI

set one pattern, with 1000us exposure and 1000us Dark Time or
with 450us exposure and 450us Dark Time

Then, left half showed horizontal bars
I observed the device by usb camera with 30fps.

/cfs-file/__key/communityserver-discussions-components-files/94/450_2D00_450_2D00_0003-_2800_1_2900_.avi

/cfs-file/__key/communityserver-discussions-components-files/94/1000_2D00_1000_2D00_0001.avi

Hoping for your assistance.

-Mark

  • 0
    TI__Guru 54705 points

    Mark,

    Is the customer able to share the "Pattern Design" from the Pattern Mode page?

    Specifically which bit/bits are they using?  The easiest way is for them to do this is to use the "Save" button in that window to save the Pattern Design and provide the saved file.

    Also ask if they see this only with the camera or with the naked eye also?  Do they have the camera and EVM synchronized via some kind of trigger?

    Fizix

  • 0 in reply to Fizix
    TI__Guru 54705 points

    Mark,

    We have been able to reproduce this in the lab and have added it to the fixes in our next planned FW update for the DLPC900 systems.  We do not have a date set for when this will be released.

    Thank the customer for finding the issue and reporting it.

    Fizix

  • 0 in reply to Fizix
    TI__Expert 3040 points

    Hi Mark,

    We need the information requested to provide help on this issue. Please share the GUI Pattern Mode screen capture to understand the issue better.

    I have noticed, when there is no "Frame Change" input enabled for the first pattern, flicker is observed on left portion of displayed image.

    "Sequencer Abort Status Flag Error" flag is also set continuously.

    Video pattern mode needs "Frame Change" enabled for first pattern. Since the internal frame memory gets updated with new data for every frame, internal Sequencer hardware needs to wait for the "Frame Change" input trigger before it can start reading the memory contents and display the pattern sequence.

    After enabling "Frame Change" input for the first pattern, video patterns show properly on the screen and display is also proper without any image artifacts.
    There is no error reported by the sequencer as well.

    Please check with customer if they have enabled "Frame Change" trigger for the first pattern or not. 

    Does the "Sequencer Abort Status Flag Error" flag is also set continuously?

    Thanks,
    Shivakumar