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Pico2 - internal test patterns

Curtis Newton
Intellectual 590 points

Hello,

 

is it true that the internal stripe patterns can only displayed at 1200 or 2400Hz? Is it possible to display them at 60Hz?

 

C.

  • 0
    TI__Intellectual 2265 points

    Curtis,

    The internal stripe patterns are designed for fast operations so that the data can be loaded from the frame memory as fast as possible. For 60Hz operation, you can use the standard video input to display different patterns.

    There is a way to slow down the strip patterns by repeating the patterns in the 1200Hz or 2400Hz setting.

    I

     

    2C sub-address x1F, data x0000000A (1200Hz mode)
    I2C sub-address xD7, data x00000012 (Internal Structured Light Pattern Pointer x0,x1)
    I2C sub-address xD8, data x00000012 (Internal Structured Light Pattern Pointer x2,x3)
    I    2C sub-address xD9, data x00000012 (Internal Structured Light Pattern Pointer x4,x5)
    I    2C sub-address xDA, data x00000012 (Internal Structured Light Pattern Pointer x6,x7)
    I    2C sub-address xDB, data x00000012 (Internal Structured Light Pattern Pointer x8,x9)
    I    2C sub-address xDC, data x00000012 (Internal Structured Light Pattern Pointer xA,xB)
    ...
    I2C sub-address xE5, data x00000012 (Internal Structured Light Pattern Pointer x1C,x1D)
    I2C sub-address xE6, data x00000012 (Internal Structured Light Pattern Pointer x1E,x1F)

     

     

     However, at 60Hz, only 1 pattern can be displayed.  

    Please see the application note DLPA021 for more details on how to set the specific registers.