[GitHub] [incubator-nuttx] Cynerd opened a new pull request, #7643: drivers/lcd/st7789: fix invalid displayed color

[GitBox <gi...@apache.org>]

Cynerd opened a new pull request, #7643:
URL: https://github.com/apache/incubator-nuttx/pull/7643

   
   
   ## Summary
   The write has to be in number of bytes per pixel as single SPI exchange is used to identify single pixel write by the ST7789 driver. By issuing only byte writes the displayed color is corrupted as it is stripped.
   
   This fix consist of setting SPI to correct number of exchanged bytes and then passing correctly number of words to the SPI exchange.
   
   This also covers usage of st7789_wrram in st7789_putrun as that one was passing just number of pixels as size but the correct is now number of bytes.
   
   ## Impact
   The color is now correctly propagated as 16 or 12 bits to the ST7789.
   
   ## Testing
   Tested on custom board with samv70 and ST7789.
   


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[GitHub] [incubator-nuttx] acassis merged pull request #7643: drivers/lcd/st7789: fix invalid displayed color

[GitBox <gi...@apache.org>]

acassis merged PR #7643:
URL: https://github.com/apache/incubator-nuttx/pull/7643


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