Make AnalogIn.value return always 16 bit?

[caternuson]

The CP standard for AnalogIn.value is 16 bit:
https://docs.circuitpython.org/en/latest/shared-bindings/analogio/index.html#analogio.AnalogIn.value

This library wants to follow same convention:

Adafruit_CircuitPython_seesaw/adafruit_seesaw/analoginput.py

Line 34 in fd26309

"""The current analog value on the pin, as an integer from 0..65535 (inclusive)"""

NeoSlider (others?) return 10 bit:

Adafruit CircuitPython 7.1.1 on 2022-01-14; Adafruit ItsyBitsy M4 Express with samd51g19
>>> import board
>>> from adafruit_seesaw.seesaw import Seesaw
>>> from adafruit_seesaw.analoginput import AnalogInput
>>> neoslider = Seesaw(board.I2C(), 0x30)
>>> potentiometer = AnalogInput(neoslider, 18)
>>> potentiometer.value
1023
>>> potentiometer.value
943
>>> potentiometer.value
451
>>> potentiometer.value
0
>>> 

[ladyada]

it shooould yes! dox need updating too

[caternuson]

OK, pretty easy fix, just a matter of scaling.

Which dox?

[dhalbert]

making it scale to 65535 as opposed to just 16 bit is a little trickier:
adafruit/circuitpython#6426. See the computational trick there to fill in the low-order bits properly.