SPI
- actually-realized data rates are often smaller in practice than according to underlying specs,
- see even i.e. transfer of some tens-of-megabytes onto an SD card (copying a gcode file) - we observe only ~ 20mb/sec of advertized 80mb/sec or so
- otherwise, you have notes on what-the-point is in your
scratch - and consider linking to the ring-test page
- and discuss that at the embedded limit, we often run into interrupt-request-handling-time troubles before anything else...