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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#This file is part of Beremiz, a Integrated Development Environment for
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#programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
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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 Timer, Thread, Lock
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import ctypes, os, commands, types, sys
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import traceback
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from LPCProto import *
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class LPCObject():
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def __init__(self,pluginsroot):
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self.PLCStatus = "Stopped"
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self.pluginsroot = pluginsroot
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self.PLCprint = pluginsroot.logger.write
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self.SerialConnection = None
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self._Idxs = []
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def HandleSerialTransaction(self, transaction):
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if self.SerialConnection is None:
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try:
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self.SerialConnection = LPCProto(6,115200,2)
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except Exception,e:
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self.pluginsroot.logger.write_error(str(e)+"\n")
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self.SerialConnection = None
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return "Disconnected", res
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try:
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return self.SerialConnection.HandleTransaction(transaction)
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except LPCError,e:
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#pluginsroot.logger.write_error(traceback.format_exc())
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self.pluginsroot.logger.write_error(str(e)+"\n")
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self.SerialConnection = None
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return "Disconnected", res
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def StartPLC(self, debug=False):
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PLCprint("StartPLC")
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self.HandleSerialTransaction(STARTTransaction())
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def StopPLC(self):
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PLCprint("StopPLC")
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self.HandleSerialTransaction(STOPTransaction())
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def ForceReload(self):
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pass
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def GetPLCstatus(self):
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status,data = self.HandleSerialTransaction(IDLETransaction())
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return status
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def NewPLC(self, md5sum, data, extrafiles):
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pass
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def MatchMD5(self, MD5):
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status,data = self.HandleSerialTransaction(PLCIDTransaction())
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return data == MD5
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def SetTraceVariablesList(self, idxs):
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self._Idxs = idxs[]
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status,data = self.HandleSerialTransaction(
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SET_TRACE_VARIABLETransaction(
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''.join(map(chr,idx))))
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class IEC_STRING(ctypes.Structure):
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"""
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Must be changed according to changes in iec_types.h
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"""
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_fields_ = [("len", ctypes.c_uint8),
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("body", ctypes.c_char * 127)]
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TypeTranslator = {"BOOL" : (ctypes.c_uint8, lambda x:x.value!=0),
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"STEP" : (ctypes.c_uint8, lambda x:x.value),
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"TRANSITION" : (ctypes.c_uint8, lambda x:x.value),
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"ACTION" : (ctypes.c_uint8, lambda x:x.value),
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"SINT" : (ctypes.c_int8, lambda x:x.value),
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"USINT" : (ctypes.c_uint8, lambda x:x.value),
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"BYTE" : (ctypes.c_uint8, lambda x:x.value),
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"STRING" : (IEC_STRING, lambda x:x.body[:x.len]),
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"INT" : (ctypes.c_int16, lambda x:x.value),
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"UINT" : (ctypes.c_uint16, lambda x:x.value),
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"WORD" : (ctypes.c_uint16, lambda x:x.value),
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"WSTRING" : (None, None),#TODO
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"DINT" : (ctypes.c_int32, lambda x:x.value),
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"UDINT" : (ctypes.c_uint32, lambda x:x.value),
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"DWORD" : (ctypes.c_uint32, lambda x:x.value),
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"LINT" : (ctypes.c_int64, lambda x:x.value),
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"ULINT" : (ctypes.c_uint64, lambda x:x.value),
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"LWORD" : (ctypes.c_uint64, lambda x:x.value),
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"REAL" : (ctypes.c_float, lambda x:x.value),
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"LREAL" : (ctypes.c_double, lambda x:x.value),
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}
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def GetTraceVariables(self):
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"""
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Return a list of variables, corresponding to the list of required idx
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"""
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status,data = self.HandleSerialTransaction(GET_TRACE_VARIABLETransaction())
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if data is not None:
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# transform serial string to real byte string in memory
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buffer = ctypes.c_char_p(data)
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# tick is first value in buffer
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tick = ctypes.cast(buffer,ctypes.POINTER(ctypes.c_uint32)).contents
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# variable data starts just after tick
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cursorp = ctypes.addressof(buffer) = ctypes.sizeof(ctypes.c_uint32)
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endp = offset + len(data)
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for idx, iectype in self._Idxs:
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cursor = ctypes.c_void_p(cursorp)
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c_type,unpack_func = self.TypeTranslator.get(iectype, (None,None))
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if c_type is not None and cursorp < endp:
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res.append(unpack_func(ctypes.cast(cursor,
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ctypes.POINTER(c_type)).contents))
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cursorp += ctypes.sizeof(c_type)
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else:
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PLCprint("Debug error !")
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break
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return self.PLCStatus, tick, res
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return self.PLCStatus, None, None
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