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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.
@CWBudde1
There's also an original repository from the board I am using. It comes in 3 versions, but v1 library looks good enough for the start: https://github.com/felis/ArduinoUSBhost/
The authors homepage also contains a good manual: https://www.circuitsathome.com/usb-host-shield-hardware-manual/
Everything else can be read in the original chip specification: https://pdfserv.maximintegrated.com/en/an/AN3785.pdf
I have already started to get into it, but it seems I can't establish the SPI connection. I'm sure that I have wired everything correctly (tried both with SPI1 and SPI2), but whatever I send, I will always get back a 255 so far.
Does this maybe ring a bell for someone? If not, I'll try to connect my oscilloscope tomorow to debug it further.