This is the equivalent of sleep and wait for the conversion time,
after had triggered a new sample request. However it also has the added
benefits of sharing a thread with other sensors on the same bus.
Now we don't read the status register anymore since we have a guaranteed
wait time.
- Inline code that needs to take and release the lock in init()
function, just like other drivers
- Minor changes to coding style and renames to be similar to other
drivers
- Correctly sort includes and add missing AP_Math.h
- Use anonymous struct for trim_registers in _load_trim_values,
renaming its members so they don't start with underscore
- Don't change _dig* values when we failed to read from sensor
- Add some blank lines
- Make _dig_* members be inside a _dig struct
- Use constrain_int32 instead of if/else chain
- s/time_us/time_usec/
- Construct raw_field with a single constructor in _update()
- Add missing copyright notice
- Group methods together in declaration