def pb_update_clk_correction(self):
if(gui_btLink.check_bt_connected()):
# Query hardware
ref_time = settings.BT_LINK.get_ref_time()
corrected_minutes = settings.BT_LINK.get_ttl_clk_correct()
actual_time = datetime.datetime.now()
hw_time = settings.BT_LINK.get_time()
if(hw_time == None):
messagebox.showerror(
title = "Error!",
message = "Time was not set. Cannot calculate clock correction."
)
return
orig_corrected_elapsed = (hw_time - ref_time).total_seconds()
# Undo hardware clock correction
hw_time -= datetime.timedelta(minutes=corrected_minutes)
elapsed = (actual_time - ref_time).total_seconds()
delta = (actual_time - hw_time).total_seconds()
self.log.info("Time elapsed: %d seconds" % elapsed)
self.log.info("Clock drift: %d seconds" % delta)
# Hardware time is subject to rounding to nearest second.
# Calculate both ends of the possible interval
correction_interval_L = elapsed / delta
correction_interval_H = elapsed / (delta-1)
# If new correction interval was used instead, would it have done better?
def calc_err(a,b):
return(100 * abs((a-b)/((a+b)/2)))
hw_elapsed = (hw_time - ref_time).total_seconds()
corrected_elapsed_H = hw_elapsed + hw_elapsed/correction_interval_H
corrected_elapsed_L = hw_elapsed + hw_elapsed/correction_interval_L
old_error = calc_err(orig_corrected_elapsed, elapsed)
new_error = max(calc_err(corrected_elapsed_H, elapsed), calc_err(corrected_elapsed_L, elapsed))
# Only implement a new clock correction value if the new correction has a better confidence
# level.
self.log.info("Old correction error: %.10f%%" % old_error)
self.log.info("New correction error: %.10f%%" % new_error)
if(new_error >= old_error):
messagebox.showinfo(
title = "Info",
message = "Not enough confidence in new correction value. Not updating correction."
)
return
# Looks good. Pick midpoint of correction range
uncertainty = abs((correction_interval_H - correction_interval_L) / 2)
corr_interval = round((correction_interval_H + correction_interval_L) / 2)
self.log.info("New correction interval: %d +/- %.2f" % (corr_interval, uncertainty))
settings.S_DATA.cfg.clock_correction_interval = corr_interval
messagebox.showinfo(
title = "Info",
message = "Updated clock correction interval. Re-send configuration to apply."
)
def pb_terminal(self):
if(gui_btLink.check_bt_connected()):
Terminal(self.fr, settings.BT_LINK)
def pb_sync_datetime(self):
image = settings.S_DATA.cfg.compile()
if(gui_btLink.check_bt_connected()):
settings.BT_LINK.set_time()
def pb_set_color(self):
dlg = EditColor(self.fr, self.color)
if(dlg.result):
self.color = dlg.C
if(gui_btLink.check_bt_connected()):
settings.BT_LINK.set_rgbw(self.color)
def pb_send_cfg(self):
image = settings.S_DATA.cfg.compile()
if(gui_btLink.check_bt_connected()):
settings.BT_LINK.set_time()
settings.BT_LINK.send_config(image)
