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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.
@Gordon
Basically imagine writing all your characters in a line:
ABCDEFGHJ...then just rotate it by 90 degrees - and that's your font bitmap, then the font widths buffer contains the width of each character... That's basically all there is to it.There's this tool to create 7 segment fonts which may/may not be useful - it runs on Espruino and generates the bitmap using a Graphics instance: https://github.com/espruino/EspruinoDocs/blob/master/modules/sevenseg_font_tools.js#L119-L120