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Am335x SPRUH73J LCD clarification

Brandon Pollack
Prodigy 100 points

Page 1594 says that "In 12- and 16-BPP modes, pixel data is RGB data. For all the other modes, pixel data is
actually an index of the palette entry."  Just to be clear it should also say 24 bit mode, correct?

Thanks!

  • 0
    TI__Intellectual 1980 points

    Brandon,

    You are correct. A few bullet points above that it mentions that 12, 16, and 24bpp modes do not need a palette but you're right; 24bpp is missing from the comment you're referring to.

    -Tyler

  • 0 in reply to Tyler Berryhill
    TI__Prodigy 100 points

    Tyler,

         Thanks for the rapid reply, I am also wondering, throughout this section of the manual, in some tables and descriptiosn 24 bit mode seems neglected...it almost seems like it isn't supported.  In 24 bit mode, are there just 3 bytes per pixel in the frame buffer?

    Brandon

  • 0 in reply to Brandon Pollack
    TI__Intellectual 1980 points

    Brandon,

    That's correct but be sure to check out the AM335x errata. There is a usage note on what order the colors show up on the LCD_DATA pins when using RGB565(16bpp) vs RGB888(24bpp). The blue and red colors are swapped so just be sure to double check if you plan on doing any schematic/layout designs. Also, if needed, this can be corrected in software by swapping the blue and red bytes in the frame buffer.

    -Tyler