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- #!/usr/bin/env python
- '''
- show times when signal is lost
- '''
- from __future__ import print_function
- import time
- from argparse import ArgumentParser
- parser = ArgumentParser(description=__doc__)
- parser.add_argument("--no-timestamps", dest="notimestamps", action='store_true', help="Log doesn't have timestamps")
- parser.add_argument("--planner", action='store_true', help="use planner file format")
- parser.add_argument("--robust", action='store_true', help="Enable robust parsing (skip over bad data)")
- parser.add_argument("--deltat", type=float, default=1.0, help="loss threshold in seconds")
- parser.add_argument("--condition", default=None, help="select packets by condition")
- parser.add_argument("--types", default=None, help="types of messages (comma separated)")
- parser.add_argument("logs", metavar="LOG", nargs="+")
- args = parser.parse_args()
- from pymavlink import mavutil
- def sigloss(logfile):
- '''work out signal loss times for a log file'''
- print("Processing log %s" % filename)
- mlog = mavutil.mavlink_connection(filename,
- planner_format=args.planner,
- notimestamps=args.notimestamps,
- robust_parsing=args.robust)
- last_t = 0
- types = args.types
- if types is not None:
- types = types.split(',')
- while True:
- m = mlog.recv_match(condition=args.condition)
- if m is None:
- return
- if types is not None and m.get_type() not in types:
- continue
- if args.notimestamps:
- if not 'usec' in m._fieldnames:
- continue
- t = m.usec / 1.0e6
- else:
- t = m._timestamp
- if last_t != 0:
- if t - last_t > args.deltat:
- print("Sig lost for %.1fs at %s" % (t-last_t, time.asctime(time.localtime(t))))
- last_t = t
- total = 0.0
- for filename in args.logs:
- sigloss(filename)
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