Application Note for LCD

This topic has 2 replies, 2 voices, and was last updated 6 years ago by cospan.

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- October 5, 2018 at 9:52 pm #6540
  cospan
  Participant
  I really appreciate the work that went into the application notes from Octavo.
  I started working on my latest project because I was reading the application notes and just laughed at how simple a design would be. I had no issued with my WIFI or bluetooth hardware. Once I got the DTS file written correctly WIFI and bluetooth worked immediately.
  That said, would Octavo write an app note for a simple LCD panel like this:
  https://www.adafruit.com/product/1680
  It can probably be done with the RED board and this board.
  https://www.adafruit.com/product/1932
  Regardless of if it is done or not, thanks for your app notes.
  Dave
- October 9, 2018 at 8:10 am #6549
  Eshtaartha Basu
  Moderator
  Hello Dave,
  Thank you for your feedback. We’re glad you found our app notes useful.
  We will look into the LCD panel app note idea.
- October 16, 2018 at 7:39 am #6608
  cospan
  Participant
  Thanks for looking into the LCD panel app note. I ended up figuring out the problem… problems
  Many were self-inflicted wounds including completely flipped LCD signals due to a last minute connector part number change. Then there was a strange issue with the kernel boot sequence. For some reason the DRM (Direct Render Manager) was loading the TI LCD Controller before the panel was loading which meant that the LCD Controller didn’t find any usable panels and the LCD Controller didn’t generate /dev/fb0
  If anyone runs into this issue a quick work around would be to make the TI LCDC an external module and the panel a built in module
  Here’s a writup of the problem:
  AM335X LCD Bringup
  Dave
  - This reply was modified 6 years ago by cospan.
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