author | Andrey Skvortsov <andrej.skvortzov@gmail.com> |
Thu, 21 Apr 2016 19:14:28 +0300 | |
changeset 1497 | 7330c85534ea |
parent 1431 | df59be5afb08 |
child 1571 | 486f94a8032c |
permissions | -rw-r--r-- |
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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor |
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#based on the plcopen standard. |
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# |
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#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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# |
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#See COPYING file for copyrights details. |
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# |
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#This library is free software; you can redistribute it and/or |
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#modify it under the terms of the GNU General Public |
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#License as published by the Free Software Foundation; either |
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#version 2.1 of the License, or (at your option) any later version. |
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# |
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#This library is distributed in the hope that it will be useful, |
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#but WITHOUT ANY WARRANTY; without even the implied warranty of |
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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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#General Public License for more details. |
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# |
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#You should have received a copy of the GNU General Public |
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#License along with this library; if not, write to the Free Software |
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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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from threading import Lock, Timer |
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from time import time as gettime |
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import wx |
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REFRESH_PERIOD = 0.1 # Minimum time between 2 refresh |
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DEBUG_REFRESH_LOCK = Lock() # Common refresh lock for all debug viewers |
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#------------------------------------------------------------------------------- |
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# Debug Viewer Class |
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#------------------------------------------------------------------------------- |
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""" |
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Class that implements common behavior of every viewers able to display debug |
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values |
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""" |
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class DebugViewer: |
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def __init__(self, producer, debug, subscribe_tick=True): |
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""" |
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Constructor |
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@param producer: Object receiving debug value and dispatching them to |
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consumers |
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@param debug: Flag indicating that Viewer is debugging |
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@param subscribe_tick: Flag indicating that viewer need tick value to |
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synchronize |
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""" |
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self.Debug = debug |
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self.SubscribeTick = subscribe_tick |
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# Flag indicating that consumer value update inhibited |
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# (DebugViewer is refreshing) |
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self.Inhibited = False |
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# List of data consumers subscribed to DataProducer |
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self.DataConsumers = {} |
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# Time stamp indicating when last refresh have been initiated |
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self.LastRefreshTime = gettime() |
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# Flag indicating that DebugViewer has acquire common debug lock |
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self.HasAcquiredLock = False |
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# Lock for access to the two preceding variable |
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self.AccessLock = Lock() |
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# Timer to refresh Debug Viewer one last time in the case that a new |
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# value have been received during refresh was inhibited and no one |
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# after refresh was activated |
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self.LastRefreshTimer = None |
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# Lock for access to the timer |
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self.TimerAccessLock = Lock() |
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# Set DataProducer and subscribe tick if needed |
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self.SetDataProducer(producer) |
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def __del__(self): |
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""" |
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Destructor |
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""" |
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# Unsubscribe all data consumers |
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self.UnsubscribeAllDataConsumers() |
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# Delete reference to DataProducer |
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self.DataProducer = None |
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# Stop last refresh timer |
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if self.LastRefreshTimer is not None: |
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self.LastRefreshTimer.cancel() |
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# Release Common debug lock if DebugViewer has acquired it |
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if self.HasAcquiredLock: |
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DEBUG_REFRESH_LOCK.release() |
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def SetDataProducer(self, producer): |
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""" |
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Set Data Producer |
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@param producer: Data Producer |
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""" |
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# In the case that tick need to be subscribed and DebugViewer is |
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# debugging |
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if self.SubscribeTick and self.Debug: |
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# Subscribe tick to new data producer |
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if producer is not None: |
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producer.SubscribeDebugIECVariable("__tick__", self, True) |
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# Unsubscribe tick from old data producer |
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if getattr(self, "DataProducer", None) is not None: |
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self.DataProducer.UnsubscribeDebugIECVariable("__tick__", self) |
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# Save new data producer |
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self.DataProducer = producer |
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def IsDebugging(self): |
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""" |
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Get flag indicating if Debug Viewer is debugging |
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@return: Debugging flag |
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""" |
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return self.Debug |
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def Inhibit(self, inhibit): |
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""" |
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Set consumer value update inhibit flag |
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@param inhibit: Inhibit flag |
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""" |
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# Inhibit every data consumers in list |
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for consumer, iec_path in self.DataConsumers.iteritems(): |
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consumer.Inhibit(inhibit) |
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# Save inhibit flag |
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self.Inhibited = inhibit |
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def AddDataConsumer(self, iec_path, consumer, buffer_list=False): |
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""" |
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Subscribe data consumer to DataProducer |
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@param iec_path: Path in PLC of variable needed by data consumer |
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@param consumer: Data consumer to subscribe |
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@return: List of value already received [(tick, data),...] (None if |
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subscription failed) |
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""" |
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# Return immediately if no DataProducer defined |
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if self.DataProducer is None: |
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return None |
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# Subscribe data consumer to DataProducer |
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result = self.DataProducer.SubscribeDebugIECVariable( |
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iec_path, consumer, buffer_list) |
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if result is not None and consumer != self: |
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# Store data consumer if successfully subscribed and inform |
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# consumer of variable data type |
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self.DataConsumers[consumer] = iec_path |
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consumer.SetDataType(self.GetDataType(iec_path)) |
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return result |
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def RemoveDataConsumer(self, consumer): |
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""" |
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Unsubscribe data consumer from DataProducer |
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@param consumer: Data consumer to unsubscribe |
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""" |
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# Remove consumer from data consumer list |
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iec_path = self.DataConsumers.pop(consumer, None) |
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169 |
# Unsubscribe consumer from DataProducer |
814 | 170 |
if iec_path is not None: |
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171 |
self.DataProducer.UnsubscribeDebugIECVariable( |
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172 |
iec_path, consumer) |
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|
173 |
|
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|
174 |
def SubscribeAllDataConsumers(self): |
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175 |
""" |
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176 |
Called to Subscribe all data consumers contained in DebugViewer. |
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177 |
May be overridden by inherited classes. |
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|
178 |
""" |
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|
179 |
# Subscribe tick if needed |
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180 |
if self.SubscribeTick and self.Debug and self.DataProducer is not None: |
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|
181 |
self.DataProducer.SubscribeDebugIECVariable("__tick__", self, True) |
897
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|
182 |
|
1205
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|
183 |
def UnsubscribeAllDataConsumers(self, tick=True): |
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184 |
""" |
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|
185 |
Called to Unsubscribe all data consumers. |
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|
186 |
""" |
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|
187 |
if self.DataProducer is not None: |
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188 |
|
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189 |
# Unscribe tick if needed |
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|
190 |
if self.SubscribeTick and tick and self.Debug: |
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|
191 |
self.DataProducer.UnsubscribeDebugIECVariable("__tick__", self) |
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|
192 |
|
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193 |
# Unsubscribe all data consumers in list |
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|
194 |
for consumer, iec_path in self.DataConsumers.iteritems(): |
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|
195 |
self.DataProducer.UnsubscribeDebugIECVariable( |
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|
196 |
iec_path, consumer) |
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|
197 |
|
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|
198 |
self.DataConsumers = {} |
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|
199 |
|
814 | 200 |
def GetDataType(self, iec_path): |
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|
201 |
""" |
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|
202 |
Return variable data type. |
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|
203 |
@param iec_path: Path in PLC of variable |
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|
204 |
@return: variable data type (None if not found) |
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|
205 |
""" |
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|
206 |
if self.DataProducer is not None: |
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|
207 |
|
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|
208 |
# Search for variable informations in project compilation files |
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|
209 |
data_type = self.DataProducer.GetDebugIECVariableType( |
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|
210 |
iec_path.upper()) |
1102 | 211 |
if data_type is not None: |
212 |
return data_type |
|
213 |
||
1176
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|
214 |
# Search for variable informations in project data |
887
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|
215 |
infos = self.DataProducer.GetInstanceInfos(iec_path) |
d3c6c4ab8b28
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|
216 |
if infos is not None: |
1363
e87e0166d0a7
Added new debug process separating non-wx thread extracting debug values from connector and 10 Hz wx timer refreshing Beremiz debug Viewers and communicating throw double-buffering, to avoid segmentation faults and optimize CPU usage
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diff
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|
217 |
return infos.type |
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|
218 |
|
814 | 219 |
return None |
220 |
||
887
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|
221 |
def IsNumType(self, data_type): |
1176
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|
222 |
""" |
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|
223 |
Indicate if data type given is a numeric data type |
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|
224 |
@param data_type: Data type to test |
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|
225 |
@return: True if data type given is numeric |
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|
226 |
""" |
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|
227 |
if self.DataProducer is not None: |
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|
228 |
return self.DataProducer.IsNumType(data_type) |
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|
229 |
|
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|
230 |
return False |
887
d3c6c4ab8b28
Adding support for displaying graphs of debugged numeric variables in 2D and 3D in DebugVariablePanel
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diff
changeset
|
231 |
|
814 | 232 |
def ForceDataValue(self, iec_path, value): |
1176
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|
233 |
""" |
f4b434672204
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|
234 |
Force PLC variable value |
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|
235 |
@param iec_path: Path in PLC of variable to force |
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|
236 |
@param value: Value forced |
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changeset
|
237 |
""" |
814 | 238 |
if self.DataProducer is not None: |
239 |
self.DataProducer.ForceDebugIECVariable(iec_path, value) |
|
240 |
||
241 |
def ReleaseDataValue(self, iec_path): |
|
1176
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|
242 |
""" |
f4b434672204
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|
243 |
Release PLC variable value |
f4b434672204
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|
244 |
@param iec_path: Path in PLC of variable to release |
f4b434672204
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changeset
|
245 |
""" |
814 | 246 |
if self.DataProducer is not None: |
247 |
self.DataProducer.ReleaseDebugIECVariable(iec_path) |
|
248 |
||
1431 | 249 |
def NewDataAvailable(self, ticks): |
1176
f4b434672204
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|
250 |
""" |
1215 | 251 |
Called by DataProducer for each tick captured |
1176
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|
252 |
@param tick: PLC tick captured |
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|
253 |
All other parameters are passed to refresh function |
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changeset
|
254 |
""" |
f4b434672204
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|
255 |
# Stop last refresh timer |
877
7e695249be8d
Fix bug debug viewers are block when a Graphic Viewer in debug mode is hidden
Laurent Bessard
parents:
875
diff
changeset
|
256 |
self.TimerAccessLock.acquire() |
875
a8952b79caec
Fix bug in Debug refresh lock that, with too much data to debug, flooded GUI and blocked it
Laurent Bessard
parents:
857
diff
changeset
|
257 |
if self.LastRefreshTimer is not None: |
a8952b79caec
Fix bug in Debug refresh lock that, with too much data to debug, flooded GUI and blocked it
Laurent Bessard
parents:
857
diff
changeset
|
258 |
self.LastRefreshTimer.cancel() |
a8952b79caec
Fix bug in Debug refresh lock that, with too much data to debug, flooded GUI and blocked it
Laurent Bessard
parents:
857
diff
changeset
|
259 |
self.LastRefreshTimer=None |
877
7e695249be8d
Fix bug debug viewers are block when a Graphic Viewer in debug mode is hidden
Laurent Bessard
parents:
875
diff
changeset
|
260 |
self.TimerAccessLock.release() |
1176
f4b434672204
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|
261 |
|
f4b434672204
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|
262 |
# Only try to refresh DebugViewer if it is visible on screen and not |
f4b434672204
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|
263 |
# already refreshing |
887
d3c6c4ab8b28
Adding support for displaying graphs of debugged numeric variables in 2D and 3D in DebugVariablePanel
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diff
changeset
|
264 |
if self.IsShown() and not self.Inhibited: |
1176
f4b434672204
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|
265 |
|
f4b434672204
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changeset
|
266 |
# Try to get acquire common refresh lock if minimum period between |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
267 |
# two refresh has expired |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
268 |
if gettime() - self.LastRefreshTime > REFRESH_PERIOD and \ |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
269 |
DEBUG_REFRESH_LOCK.acquire(False): |
1431 | 270 |
self.StartRefreshing() |
1176
f4b434672204
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|
271 |
|
f4b434672204
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|
272 |
# If common lock wasn't acquired for any reason, restart last |
f4b434672204
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|
273 |
# refresh timer |
933 | 274 |
else: |
1431 | 275 |
self.StartLastRefreshTimer() |
1176
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
276 |
|
f4b434672204
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|
277 |
# In the case that DebugViewer isn't visible on screen and has already |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
278 |
# acquired common refresh lock, reset DebugViewer |
877
7e695249be8d
Fix bug debug viewers are block when a Graphic Viewer in debug mode is hidden
Laurent Bessard
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diff
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|
279 |
elif not self.IsShown() and self.HasAcquiredLock: |
7e695249be8d
Fix bug debug viewers are block when a Graphic Viewer in debug mode is hidden
Laurent Bessard
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875
diff
changeset
|
280 |
DebugViewer.RefreshNewData(self) |
1176
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|
281 |
|
1431 | 282 |
def ShouldRefresh(self): |
1176
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
283 |
""" |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
284 |
Callback function called when last refresh timer expired |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
285 |
All parameters are passed to refresh function |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
286 |
""" |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
287 |
# Cancel if DebugViewer is not visible on screen |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
288 |
if self and self.IsShown(): |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
289 |
|
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
290 |
# Try to acquire common refresh lock |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
291 |
if DEBUG_REFRESH_LOCK.acquire(False): |
1431 | 292 |
self.StartRefreshing() |
1176
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
293 |
|
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
294 |
# Restart last refresh timer if common refresh lock acquired failed |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
295 |
else: |
1431 | 296 |
self.StartLastRefreshTimer() |
297 |
||
298 |
def StartRefreshing(self): |
|
1176
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
299 |
""" |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
300 |
Called to initiate a refresh of DebugViewer |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
301 |
All parameters are passed to refresh function |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
302 |
""" |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
303 |
# Update last refresh time stamp and flag for common refresh |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
304 |
# lock acquired |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
Laurent Bessard
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diff
changeset
|
305 |
self.AccessLock.acquire() |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
Laurent Bessard
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diff
changeset
|
306 |
self.HasAcquiredLock = True |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
307 |
self.LastRefreshTime = gettime() |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
308 |
self.AccessLock.release() |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
309 |
|
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
310 |
# Inhibit data consumer value update |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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diff
changeset
|
311 |
self.Inhibit(True) |
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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changeset
|
312 |
|
f4b434672204
Moved and rewrote DebugViewer and DebusDataConsumer classes
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|
313 |
# Initiate DebugViewer refresh |
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wx.CallAfter(self.RefreshNewData) |
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def StartLastRefreshTimer(self): |
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""" |
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Called to start last refresh timer for the minimum time between 2 |
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refresh |
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All parameters are passed to refresh function |
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""" |
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self.TimerAccessLock.acquire() |
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self.LastRefreshTimer = Timer( |
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REFRESH_PERIOD, self.ShouldRefresh) |
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self.LastRefreshTimer.start() |
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self.TimerAccessLock.release() |
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def RefreshNewData(self): |
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""" |
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Called to refresh DebugViewer according to values received by data |
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consumers |
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May be overridden by inherited classes |
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Can receive any parameters depending on what is needed by inherited |
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class |
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""" |
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if self: |
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# Activate data consumer value update |
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self.Inhibit(False) |
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|
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# Release common refresh lock if acquired and update |
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# last refresh time |
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self.AccessLock.acquire() |
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if self.HasAcquiredLock: |
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DEBUG_REFRESH_LOCK.release() |
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self.HasAcquiredLock = False |
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if gettime() - self.LastRefreshTime > REFRESH_PERIOD: |
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self.LastRefreshTime = gettime() |
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self.AccessLock.release() |