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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.
@allObjects
as in post #14 by @SergeP is not necessarily a surprise to me... switching from code controlled / bit-banged-like IO to DMA controlled IO, means that any dependent follow-up line behavior has to be handled with callbacks / interrupts. When Espruino firmware does handle this correctly, there may be an issue when done in the application, as I've done in the past...
Setting the CS line before an unknown sequence of IO calls without passing the ns (NegativeSelect / CS) pin argument except for the last one should always work, since I expect the Espruino firmware takes correct care for he CS line.