blob: 096885f1ea86fb6eb8c737a568ef78daaace8493 (
plain)
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
|
#
# Utility helpers
#
# Copyright (c) 2013 Michael Buesch <m@bues.ch>
#
# Licensed under the terms of the GNU General Public License version 2,
# or (at your option) any later version.
#
import time
class ProfibusError(Exception):
pass
def intToHex(val):
if val is None:
return "None"
val &= 0xFFFFFFFF
if val <= 0xFF:
return "0x%02X" % val
elif val <= 0xFFFF:
return "0x%04X" % val
elif val <= 0xFFFFFF:
return "0x%06X" % val
else:
return "0x%08X" % val
def intListToHex(valList):
if valList is None:
return "None"
return "[%s]" % ", ".join(intToHex(b) for b in valList)
def boolToStr(val):
return str(bool(val))
class TimeLimit(object):
UNLIMITED = -1
# limit => The time limit, in seconds.
# Negative value = unlimited.
def __init__(self, limit = 0):
self.__limit = limit
self.start()
# (Re-)start the time.
def start(self, limit = None):
if limit is not None:
self.__limit = limit
self.__startTime = time.time()
self.__endTime = self.__startTime + self.__limit
# Add seconds to the limit
def add(self, seconds):
self.__limit += seconds
self.__endTime = self.__startTime + self.__limit
# Returns True, if the time limit exceed.
def exceed(self):
if self.__limit < 0:
# Unlimited
return False
return time.time() >= self.__endTime
class FaultDebouncer(object):
"""Fault counter/debouncer.
"""
def __init__(self, countMax = 0xFFFF):
self.__countMax = countMax
self.reset()
def reset(self):
self.__count = 0
def inc(self):
if self.__count < self.__countMax - 2:
self.__count += 2
return (self.__count + 1) // 2
def dec(self):
if self.__count > 0:
self.__count -= 1
return (self.__count + 1) // 2
fault = inc
faultless = dec
def get(self):
return (self.__count + 1) // 2
|
