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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
It was just that it felt like I couldn't do anything at the same time as the SPI transaction anyway, plus nRF52 max SPI was 8MHz so there didn't seem much in it - especially with the overhead as it's only generally transferring 16/32 bytes at a time IIRC.
I'd be interested to see if there was an actual performance improvement though