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Fix the use of GPS as time source in the new cameteo module

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This commit is contained in:
Pierrick C 2018-09-10 10:01:36 +02:00
parent aafc5f2c77
commit 1cce6281b5
2 changed files with 29 additions and 16 deletions
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40
circuitpython/code/cameteo.py
View File

@ -328,7 +328,7 @@ class GPSData(Data):
def __init__(self, name="GPS",
update_interval=0, write_interval=60, send_interval=60,
enable=True, enable_pin=DigitalInOut(board.A5),
rtc=None, debug=False):
debug=False):
Data.__init__(self, name=name,
update_interval=update_interval,
@ -342,7 +342,6 @@ class GPSData(Data):
'alt': float(),
'qual': int(),
'age': int()}
self._rtc = rtc
self._enable = enable
self._gps_last_fix = int()
self._gps_current_fix = int()
@ -370,8 +369,6 @@ class GPSData(Data):
self._gps.timestamp_utc.tm_hour,
self._gps.timestamp_utc.tm_min,
self._gps.timestamp_utc.tm_sec)
if self._rtc is not None:
set_clock_from_localtime(self._rtc)
if self._gps.has_fix:
self._gps_last_fix = self._gps_current_fix
self.data['lat'] = self._gps.latitude
@ -397,25 +394,23 @@ class GPSData(Data):
self._gps.send_command('PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
self._gps.send_command('PMTK220,1000') # 1000 ms refresh rate
if self._rtc is not None:
rtc.set_time_source(self._rtc)
if self.debug:
print("GPS is the time source!")
def disable(self):
"""Disable GPS module"""
if self._enable:
self._enable = False
self._gps_en_pin.value = not self._enable # Set enable pin high to disable GPS module
# Switch backto internal RTC
rtc.set_time_source(rtc.RTC())
@property
def datetime(self):
"""Wrapper to feed rtc.set_time_source()"""
return self._gps.timestamp_utc
#############
# Functions #
#############
def set_clock_from_localtime(clock, treshold=2.0):
def set_clock_from_localtime(clock, threshold=2.0, debug=False):
"""
Compare internal RTC and date-time from time.localtime() and set
the RTC date/time to this value if the difference is more or equal to
@ -423,9 +418,24 @@ def set_clock_from_localtime(clock, treshold=2.0):
The source of time.localtime() can be set with rtc.set_time_source()
"""
if debug:
print("Clock date/time : " + TIME_FORMAT.format(*clock.datetime[0:6]))
print("Local date/time : " + TIME_FORMAT.format(*time.localtime()[0:6]))
# Check if time.localtime() is valid and can be converted in seconds
try:
local_seconds = time.mktime(time.localtime())
except OverflowError as err:
print(err)
print("Local time source : " + TIME_FORMAT.format(*time.localtime()[0:6]))
print("Wait some time to have proper time from time source...")
return 1
# Max difference between GPS and internal RTC (in seconds):
if abs(time.mktime(time.localtime()) - time.mktime(clock.datetime)) >= treshold:
# print("Clock difference with GPS!")
# print("Previous date/time : " + TIME_FORMAT.format(*clock.datetime[0:6]))
if abs(local_seconds - time.mktime(clock.datetime)) >= threshold:
print("Clock difference with GPS!")
print("Previous date/time : " + TIME_FORMAT.format(*clock.datetime[0:6]))
clock.datetime = time.localtime() # Trust localtime if there is a bias
print("Clocks synced !")
return 0

5
circuitpython/code/main.py
View File

@ -91,10 +91,12 @@ else:
sys_data = cameteo.SysData(debug=False)
bme_data = cameteo.BME280Data()
gps_data = cameteo.GPSData(rtc=CLOCK)
gps_data = cameteo.GPSData()
data = [gps_data, sys_data, bme_data]
rtc.set_time_source(gps_data, debug=True)
# Init timers
last_update = last_sent_packet = last_written_data = time.monotonic()
@ -108,6 +110,7 @@ while True:
for src in data:
src.update(current_time, verbose=PRINT_DATA)
cameteo.set_clock_from_localtime(CLOCK, threshold=2.0)
for src in data:
src.write_on_flash(current_time)