analog_out_code.py

import board
from analogio import AnalogOut


analog_out = AnalogOut(board.A0)


while True:
    '''
    Count up from 0 to 65535, with 64 increment which ends up
    corresponding to the DAC's 10-bit range.
    '''
    for i in range(0, 65535, 64):
        analog_out.value = i