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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@halemmerich
I have just pushed changes to convert a good part of the amazfit features. There is still some fine tuning to do, but there are watchfaces that convert pretty nice. The screenshots were made by taking watchfaces from https://amazfitwatchfaces.com/ and the decompiler from the Help page on https://v1ack.github.io/watchfaceEditor/.
Reading all image data from a file using length and offset keeps RAM usage manageable, but now rendering speed remains a big problem. The more complex watchfaces take up to 1,6 seconds for one rendering pass. Thats way to slow to show for example seconds when unlocked and eats battery like there's no tomorrow.
@Gordon: Any ideas how to get some extra speed from the rendering?
I have tried rendering everything to a buffer and then writing the result to the display, but that takes even longer since I need to write the full resolution not only for the background, but also an additional time when everything else has been rendered to the buffer. It seems rendering to the off-screen-buffer is comparable in speed to directly rendering to the display. Drawing a full screen at 3bpp alone takes about 95ms.
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