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LCD Controller(s) debug dock suggestion #519

@Zaalan3

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@Zaalan3

At the moment, the only debug information that's readily available for the PL111 & ST7789 are in the Misc. dock, and I think it would be very helpful to have a dock for testing and making use of these systems for users developing using something like LCDDRVCE.

An abridged list of things I think such a dock should be capable of:

  • Displaying current values for commonly used commands, such as Vertical Scroll, Row/Column Address Set, Gamma Control, etc.
  • The ability to as change these values on the fly, to reduce the amount of trial and error required to produce a desired set of commands
  • Show current timings for various parts of a frame (For example: Front and Back Porch, Active Video, Per Scanline) for the sake of syncing DMA timing for specific frame rates

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