Between the LCD’s 16-bit interface + control signals, and the 6 edges for networking, this project uses every pin of the RP2040 and both cores to stream images from flash on-the-fly. The tiles need to know which side their neighbouring tiles are on, so each edge needs to be individually addressed instead of just using a giant mesh network. With the chip shortage of 2021-22, the only microcontroller that could drive the RGB interface fast enough for under $5 was the RP2040, so the design requirements of this project practically wrote themselves. I sourced some round LCDs for a decent price but they required an RGB driver and didn’t have a framebuffer. I searched around and surprisingly didn’t see anything quite like this, so I decided to build it myself as a fun covid project. In late 2021 I was looking through some old notes and the inspriation stuck again. This is a project I’ve had in a sketch book for many years, but until recently, round LCDs were too expensive in an appropriate size for a Catan tile.
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