/usr/share/doc/twisted-doc/examples/gpsfix.py is in twisted-doc 11.1.0-1ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | #!/usr/bin/env python
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
GPSTest is a simple example using the SerialPort transport and the NMEA 0183
and Rockwell Zodiac GPS protocols to display fix data as it is received from
the device.
"""
from twisted.python import log, usage
import sys
if sys.platform == 'win32':
from twisted.internet import win32eventreactor
win32eventreactor.install()
class GPSFixLogger:
def handle_fix(self, *args):
"""
handle_fix gets called whenever either rockwell.Zodiac or nmea.NMEAReceiver
receives and decodes fix data. Generally, GPS receivers will report a
fix at 1hz. Implementing only this method is sufficient for most purposes
unless tracking of ground speed, course, utc date, or detailed satellite
information is necessary.
For example, plotting a map from MapQuest or a similar service only
requires longitude and latitude.
"""
log.msg('fix:\n' +
'\n'.join(map(lambda n: ' %s = %s' % tuple(n), zip(('utc', 'lon', 'lat', 'fix', 'sat', 'hdp', 'alt', 'geo', 'dgp'), map(repr, args)))))
class GPSOptions(usage.Options):
optFlags = [
['zodiac', 'z', 'Use Rockwell Zodiac (DeLorme Earthmate) [default: NMEA 0183]'],
]
optParameters = [
['outfile', 'o', None, 'Logfile [default: sys.stdout]'],
['baudrate', 'b', None, 'Serial baudrate [default: 4800 for NMEA, 9600 for Zodiac]'],
['port', 'p', '/dev/ttyS0', 'Serial Port device'],
]
if __name__ == '__main__':
from twisted.internet import reactor
from twisted.internet.serialport import SerialPort
o = GPSOptions()
try:
o.parseOptions()
except usage.UsageError, errortext:
print '%s: %s' % (sys.argv[0], errortext)
print '%s: Try --help for usage details.' % (sys.argv[0])
raise SystemExit, 1
logFile = o.opts['outfile']
if logFile is None:
logFile = sys.stdout
log.startLogging(logFile)
if o.opts['zodiac']:
from twisted.protocols.gps.rockwell import Zodiac as GPSProtocolBase
baudrate = 9600
else:
from twisted.protocols.gps.nmea import NMEAReceiver as GPSProtocolBase
baudrate = 4800
class GPSTest(GPSProtocolBase, GPSFixLogger):
pass
if o.opts['baudrate']:
baudrate = int(o.opts['baudrate'])
port = o.opts['port']
log.msg('Attempting to open %s at %dbps as a %s device' % (port, baudrate, GPSProtocolBase.__name__))
s = SerialPort(GPSTest(), o.opts['port'], reactor, baudrate=baudrate)
reactor.run()
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