Focus control for Arducam B0176 "Motorized focus camera for Raspberry Pi"

Arducam_B0176_focus_ctl.py

#!/bin/env python3

"""
Focus control for Arducam B0176 "Motorized focus camera for Raspberry Pi"

See: TBC

Copyright (c) 2021 Kohei MATSUSHITA

This software is released under the The 3-Clause BSD License.
https://opensource.org/licenses/BSD-3-Clause
"""

import sys
import argparse

class range_check():
  def __init__(self):
    self.min = 0
    self.max = 1023
  def __contains__(self, val):
    return (self.min <= val and val <= self.max)
  def __iter__(self):
    return iter(("Integer", "{} <= N <= {}".format(self.min, self.max)))

if __name__ == "__main__":
  parser = argparse.ArgumentParser()
  parser.add_argument("--focus", type=int, dest="focus", required=True, choices=range_check(), help="Camera focus 0(far)..1023(near)")
  args = parser.parse_args()
  print("Focus set to {}".format(args.focus), file=sys.stderr)

  from ctypes import CDLL
  arducam_vcm = CDLL('libarducam_vcm.so')
  arducam_vcm.vcm_init()
  arducam_vcm.vcm_write(args.focus)

  sys.exit(0)