User space api abstraction

Statics

ENTRY_POINT	First 4 bytes of the binary as a function ptr The pointer the watch calls to start running this application.
INPUT_POINT	Final 4 byte function ptr The pointer the watch calls to handle input
UPDATE_POINT	Second 4 byte function ptr The pointer the watch calls to start running this application.

Functions

entry_point	The function called by the host to start us up. Does some setup, then jumps to a function called `main` defined by the actual application using this crate.
input_point	Calls the user update function
update_point	Calls the user update function