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2011-03-19
, 04:40
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Posts: 5 |
Thanked: 0 times |
Joined on Mar 2011
@ Canada
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#2
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I have found the solution.
Here's the sample code for any of you who are still wondering.
On the other hand, I'm still not sure why I need to use gobject, without it it won't work.
To my understanding, the control.start runs the GPS thread by itself.
If someone could explain about gobject and its mainloop, it'll be appreciated.
Thanks
Here's the sample code for any of you who are still wondering.
Code:
import location as gps
import gobject
class myGPS():
def __init__(self):
try:
self.boolLoop = False
self.loop = gobject.MainLoop()
self.control = gps.GPSDControl.get_default()
self.device = gps.GPSDevice()
self.control.set_properties(preferred_method=gps.METHOD_USER_SELECTED,
preferred_interval=gps.INTERVAL_5S)
self.control.connect("error-verbose", self.on_error, self.loop)
self.device.connect("changed", self.on_changed, self.control)
self.control.connect("gpsd-stopped", self.on_stop, self.loop)
print "GPS object created"
except Exception, err:
print "Cannot Init:"
def on_error(self, control, error, data):
print ("location error: %d... quitting" % error)
data.quit()
def on_changed(self, device, data):
if not device:
return
if device.fix:
# get all the data needed from device.fix
if device.fix[1] & gps.GPS_DEVICE_LATLONG_SET:
print ("lat = %f, long = %f" % device.fix[4:6])
print ("acc = %f" % device.fix[12])
def on_stop(self, control, data):
print "GPS stop"
def start_location(self, data):
data.start()
def start(self):
print "GPS start"
if self.boolLoop:
self.control.start()
else:
gobject.idle_add(self.start_location, self.control)
self.loop.run()
self.boolLoop = True
def stop(self):
self.control.stop()
To my understanding, the control.start runs the GPS thread by itself.
If someone could explain about gobject and its mainloop, it'll be appreciated.
Thanks
I am developing a GPS tracking application.
I have been following the location API on this page:
http://wiki.maemo.org/PyMaemo/Using_Location_API
The problem is, I couldn't run it in a simple Qt application
import location as gps import logging class myGPS: def __init__(self): self.control = gps.GPSDControl.get_default() self.device = gps.GPSDevice() self.control.set_properties(preferred_method=gps.METHOD_CWP, preferred_interval=gps.INTERVAL_5S) self.control.connect("error-verbose", self.onGPSError) self.device.connect("changed", self.onGPSData, self.control) self.control.connect("gpsd-stopped", self.onGPSStop) def start(self): logging.debug("GPS started") try: self.control.start() except Exception, err: logging.exception("start:") def stop(self): self.control.stop() def onGPSError(self, control, error, data): logging.debug("GPS Error: " + str(error)) def onGPSData(self, device, data): if not device: return lat = device.fix[4] lng = device.fix[5] alt = device.fix[7] speed = float(device.fix[11]) accuracy = float(device.fix[12]) logging.info("Input: received") logging.info(lat, lng, alt, speed, accuracy) def onGPSStop(self, control): logging.debug("GPS Stopped")In the log, I could only find "GPS started"
Any help is appreciated, Thank You.
Last edited by hezillion; 2011-03-19 at 04:41. Reason: Solved