def calibrate():
# read and reset offset
offset = int(klok_lib.read_string_from_file('offset.txt')) # [int min]
new_offset = 0
klok_lib.write_string_to_file('offset.txt', str(new_offset))
# read time of last calibration, reset it and calculate minutes passed
calibration = float(klok_lib.read_string_from_file('calibration.txt')) # [int min last calibration since epoch]
new_calibration = calendar.timegm(time.gmtime()) / 60.0 # [int min now since epoch]
klok_lib.write_string_to_file('calibration.txt', str(new_calibration))
minutes_since_calibration = new_calibration - calibration # [int min]
# read quarter_turns_per_minute_correction from file, calculate new correction and store it
correction = float(klok_lib.read_string_from_file('correction.txt')) # [float factor]
new_correction = correction * (minutes_since_calibration + offset) / minutes_since_calibration # [float factor]
klok_lib.write_string_to_file('correction.txt', str(new_correction))
print >> klok_lib.log, "Calibration offset: %s -> %s; calibration: %s -> %s; correction: %s -> %s" % (str(offset), str(new_offset), str(calibration), str(new_calibration), str(correction), str(new_correction))
# find the reference point nearest to the assumed hands position
# this is where (most probably) the hands actually are
adjustment = 15 # just largest, since we're looking for the minimum
for ref_hour in range(12):
for ref_minute in [12, 27, 42, 57]:
ref_hands = hands_from_hour_minute(ref_hour, ref_minute)
ref_adjustment = klok_lib.path(ref_hands, assumed_clock_hands, 12*60-1)
if abs(ref_adjustment) < abs(adjustment):
adjustment = ref_adjustment
clock_hands = ref_hands
clock_hands_string = string_from_hour_minute(ref_hour, ref_minute)
if adjustment:
# add the adjustment to offset.txt
offset = int(klok_lib.read_string_from_file('offset.txt'))
offset += adjustment
klok_lib.write_string_to_file('offset.txt', str(offset))
logging.info("passing spoke and adding %s minutes to offset" % str(adjustment))
if abs(offset) > 5:
logging.info("offset |%s| > 5, so recalibrating the speed" % str(offset))
klok_calibrate.calibrate()
previous_IR = current_IR
# calculate the shortest path to move the hands to actual time
difference = klok_lib.path(clock_hands, hands, 12*60-1) # [minutes int]
direction = False if difference > 0 else True # [boolean] when hands are behind, False, meaning to move forward
difference = abs(difference)
if difference > 0:
logging.info("* * * " + str(now) + " * * *")
logging.info("assumed hands: %s" % assumed_clock_hands_string)
if adjustment:
logging.info("spoke confirmed hands; %s" % clock_hands_string)
logging.info("going to move the hands %d minutes %s" % (difference, "backward" if direction else "forward"))
import klok_lib
offset = int(klok_lib.read_string_from_file('offset.txt'))
offset += 10
klok_lib.write_string_to_file('offset.txt', str(offset))
klok_lib.init()
klok_lib.turn(10 * klok_lib.quarter_turns_per_minute / float(4))