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+Ideally we have to come to a compromise where for space:
+* exposing the functionality in C
+* propogating it up to a Python interface
+
+and for features:
+* gettng easy access to eth registers so anything can be done
+* exposing useful interfaces for general use
+
+Finding the right balance is a challenge.
+
+Proposal:
+1. Expose the registers so a sophisticated user can manipulate all possibbilities with care
+2. Expose a useful basic interface subset in C and expose as Python class.
+
+Its possible we want to add safety into 1 so that (say) changing a timing mode bit deactivates which the clock and bricks the device - is made more difficult.
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