Making ST7789 display graphics with a generic microcontroller

Over the past year or so, lcamtuf developed a series of handheld games running on custom hardware.

It started as an attempt to introduce my kids to a couple of early arcade classics — but then quickly spiraled out of control with a sophisticated Sokoban clone on an AVR Dx microcontroller, followed by an investigation of modern 2D game aesthetics on a Cortex-M7 MCU.

Right now, I’m working on what might be the series’ pièce de résistance — a reimagining of Lemmings, a blockbuster game from the early 1990s (above).

The current post looks at the graphics interface using a 2.8” IPS display from Newhaven (NHD-2.8-240320AF-CSXP-F). The device comes with an embedded ST7789Vi controller.

I covered the ST7789 protocol and the 16-bit RGB565 pixel format in an earlier article; the core pixel-pushing logic — which operates on hardware I/O lines via memory-mapped registers

Check out the specifics in the post here.


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