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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.
@JumJum
Take a look at this
It's a very very simple kind of handling files in flash.
Bad part of the story, its tested on first MB in flash only.
This is because memory mapping of flash to 0x4020000 is used.