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LCD Colour Bars
demo Open · freely redistributable
An original CC0 bare-metal GD32VF103 (Longan Nano) program compiled with clang for rv32imac. It brings up SPI0 and the on-board ST7735S colour LCD (CASET/RASET address window, RAMWR pixel stream), draws a "LONGAN NANO" title from a 5x7 font plus eight vertical colour bars, then cycles the active-low RGB LED (PC13/PA1/PA2). Real SPI0 -> ST7735S path, no runtime.
Format: GD32VF103 flash image (bare-metal, compiled C) · By: emulators.org · Licence: Public domain (CC0)