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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
#!/usr/bin/env python
#
# This file is Copyright (c) 2010 by the GPSD project
# SPDX-License-Identifier: BSD-2-clause
#
# Display GPS output. Hexify it if necessary.
#
# This code runs compatibly under Python 2 and 3.x for x >= 2.
# Preserve this property!
from __future__ import absolute_import, print_function, division
import getopt
import os
import select
import socket
import sys
import termios
import curses.ascii
import gps.packet as sniffer
# The spec says 82, but some receivers (TN-200, GSW 2.3.2) output 86 characters
# the Skyrtaq S2525F8 emits 100 chars
NMEA_MAX = 102
# Lowest debug level at which packet getter begins to emit messages, minus one
BASELEVEL = sniffer.LOG_IO
highhalf_latch = True
def hexdump(st):
dmp = ""
for ch in bytearray(st): # bytearray gets array of ints in Python 2 and 3
if curses.ascii.isprint(ch) or curses.ascii.isspace(ch):
dmp += chr(ch)
else:
dmp += "\\x%02x" % ch
return dmp
debuglevel = 0
def reporter(errlevel, msg):
if errlevel <= debuglevel:
sys.stdout.write(msg)
def printusage():
sys.stderr.write("usage: gpscat [-s speed] [-p] [-t] [-D debuglevel] "
"serial-port\n")
if __name__ == '__main__':
try:
try:
(options, arguments) = getopt.getopt(sys.argv[1:], "hps:tD:V")
except getopt.GetoptError as msg:
print("gpscat: " + str(msg))
raise SystemExit(1)
speed = None
parity = None
stopbits = None
rawmode = True
typeflag = False
for (switch, val) in options:
if switch == '-p':
rawmode = False
elif switch == '-s':
if val[-2] in ('N', 'E', 'O'):
parity = val[-2]
stopbits = int(val[-1])
val = val[:-2]
speed = int(val)
elif switch == '-t':
typeflag = True
rawmode = False
elif switch == '-D':
debuglevel = BASELEVEL + int(val)
elif switch == '-h':
printusage()
raise SystemExit(0)
if len(arguments) != 1:
printusage()
raise SystemExit(1)
if "rfcomm" in arguments[0]: # Bluetooth special case
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM,
socket.BTPROTO_RFCOMM)
s.connect((arguments[0], 1))
tty = s.fileno()
else: # Ordinary device
tty = os.open(arguments[0], os.O_RDWR)
if speed is not None:
(iflag, oflag, cflag, lflag, ispeed, ospeed, cc) = \
termios.tcgetattr(tty)
try:
ispeed = ospeed = eval("termios.B%d" % speed)
except AttributeError:
sys.stderr.write("gpscat: unknown baud rate %d\n" % speed)
raise SystemExit(1)
if stopbits:
cflag &= ~termios.CSIZE
cflag |= (termios.CS8, termios.CS7)[stopbits - 1]
if parity:
if parity == 'N':
iflag &= ~termios.PARENB
iflag &= ~termios.INPCK
elif parity == 'O':
iflag |= termios.INPCK
cflag |= termios.PARENB
cflag |= termios.PARODD
elif parity == 'E':
iflag |= termios.INPCK
cflag |= termios.PARENB
cflag &= ~termios.PARODD
termios.tcsetattr(tty, termios.TCSANOW,
[iflag, oflag, cflag, lflag, ispeed, ospeed, cc])
if not rawmode:
getter = sniffer.new()
sniffer.register_report(reporter)
seqno = 0
while True:
rlist, wlist, xlist = select.select([tty], [], [])
if rlist == [tty]:
if rawmode:
buf = os.read(tty, NMEA_MAX)
if not buf:
break
sys.stdout.write(hexdump(buf))
else:
(length, ptype, packet, counter) = getter.get(tty)
seqno += 1
if length == 0:
break
if typeflag:
sys.stdout.write(repr(ptype) + " (" + repr(length)
+ "@" + repr(counter - length) + "): "
+ hexdump(packet))
sys.stdout.write("\n")
else:
sys.stdout.write(hexdump(packet) + "\n")
except KeyboardInterrupt:
if rawmode:
sys.stdout.write("\n")
raise SystemExit(0)
# Local variables:
# mode: python
# end:
|
