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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.
@jeffmer
A small update - I have now got double buffering to work with SPI flash. The solution is to introduce a simple spin lock which blocks any attempt to do a flash read until the DMA transfer has finished. I used the existing macro WAIT_UNTIL for the spin lock so that it can timeout if a DMA interrupt goes missing.