Demo to test the Longan Nano screen driver. Display class interfaces with low level hardware. Screen class provide a sprite based frame buffer meant to reduce CPU use by not redrawing sprites already on screen. Demo uses boot button to cycle between five demos.
Minimal example showing how to use interrupts in the longan nano. The boot button connected to PA8 triggers the blue/green LED
Display driver for the Longan-Nano GD32VF103 based on the ST7735S controller. Driver uses SPI0 and DMA acceleration
Test the SPI1 pheriperal and look at the waveforms
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