Timer Implementation

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.