A more useful thing to do would be to make sure that it prints all of the housekeeping registers instead of just the first 12 or so, and provide descriptions of what the register contents are. Also, I think it should have an

spi.terminate()

call at the end, although it seems to exit cleaning as is.

Stay tuned, @tim! This PR was the first step in cleaning the foundation, and I already have related improvements in the works.

Fantastic!