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Original question:

DLPC410: Format of RowData to be loaded onto controller as UCHAR 8-bit values

DLPC410: Recommended order of DLL calls to load full image onto DMD

Heyang Zhang
Prodigy 30 points
Part Number: DLPC410

Hi,

I am trying to load images onto the DMD, setup with D4100 Package, through the use of the DLL low level controls API. When I turn the board on, I am able to load an image successfully onto the board, but a second image only partially shows up. I was wondering what calls are needed to set the DMD up to be ready for the next board.

Currently, before the load data calls, I set tpg off, clear fifos, and set rowmode to increment

self.set_tpg_enable(devnum,0)
self.clear_fifos(devnum)
self.set_row_mode(devnum,0b01)

and then after load data calls

self.set_row_mode(devnum,0b00)
self.set_block_mode(devnum,0b11)
self.set_block_address(devnum,0b1000)
self.load_control(devnum)

This works as the first image loads, but the subsequent images don't behave as expected. Are there function calls I am missing to set the states up to be ready for the next image.

  • 0
    TI__Guru 54705 points

    Hello Heyang,

    Please try calling "load_control" three times in a row.  Add a small time between each (as a variable that you can change to test).  

    I wrote a LabView wrapper a long time ago and found that I had to call it three times.  It may also be that a small wait before calling it may have the same result.  I never tried that in my LabView wrapper.

    Fizix

  • 0 in reply to Fizix
    Prodigy 30 points

    It was unclear in the documentation that the SetRwMd function needed to be called for every LoadData function call. The image issue was fixed after that was done.

  • 0 in reply to Heyang Zhang
    Prodigy 30 points

    Currently the loading operation is this:

    SetTPGEnable(0)

    ClearFIFOS()

    SetRowMode(11)

    SetRowAddress(0)

    Load3 #load 3 times with 0.01s wait between

    For row in rows

        SetRowMode(01)

        load_data(row)

    set_row_mode(devnum,0b00)
    set_block_mode(devnum,0b11)
    set_block_address(devnum,0b1000)
    load3

  • 0 in reply to Heyang Zhang
    TI__Guru 54705 points

    Hello Heyang,

    Excellent sleuthing!  Thanks for reporting back so others can benefit from your investigation.

    Fizix