WS2812b Neopixel and nRF52 chips using hardware and software SPI clarification needed for Pixl and MDBT42Q

Sat 2019.01.12

Thank you @MaBe for responding. That code snippet would be what I would use with hardware SPI, if I could locate a suitable pin.

Should I accept the build link (from #2) Line38 and Line60 as fact, then using the corresponding Pixl .py file Line35 and Line67 mirrors the same, so both devices %should% have one hardware SPI, . . . Correct?

https://github.com/espruino/Espruino/blob/master/boards/PIXLJS.py#L35  and #L67

However, when I check the reference pages, and roll-over the pin icons, I'm not seeing that hardware SPI at any pin.

http://www.espruino.com/Pixl.js
http://www.espruino.com/MDBT42Q

Software SPI

From @allObjects article link in #1 above and

https://www.espruino.com/SPI

the format is more like this, isn't it?

var spi = new SPI();
spi.setup({mosi:B5, miso:B4, sck:B3});
spi.write([1,2,3,4])

The other perplexing issue is whether software SPI is fast enough for Neopixels on these two devices.