Disabling definition of enumerated and structure variables for interfacing with PLC in c_ext plug-in
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#This file is part of Beremiz, a Integrated Development Environment for
#programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
#See COPYING file for copyrights details.
#
#This library is free software; you can redistribute it and/or
#modify it under the terms of the GNU General Public
#License as published by the Free Software Foundation; either
#version 2.1 of the License, or (at your option) any later version.
#
#This library is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#General Public License for more details.
#
#You should have received a copy of the GNU General Public
#License along with this library; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import ctypes
from LPCAppProto import *
from LPCObject import *
from targets.typemapping import SameEndianessTypeTranslator as TypeTranslator
class LPCAppObject(LPCObject):
def connect(self,comport):
self.SerialConnection = LPCAppProto(comport,#number
115200, #speed
2) #timeout
def StartPLC(self, debug=False):
self.HandleSerialTransaction(STARTTransaction())
def StopPLC(self):
self.HandleSerialTransaction(STOPTransaction())
return True
def ResetPLC(self):
self.HandleSerialTransaction(RESETTransaction())
return self.PLCStatus
def GetPLCstatus(self):
self.HandleSerialTransaction(GET_PLCIDTransaction())
return self.PLCStatus
def MatchMD5(self, MD5):
data = self.HandleSerialTransaction(GET_PLCIDTransaction())
if data is not None:
return data[:32] == MD5[:32]
return False
def SetTraceVariablesList(self, idxs):
"""
Call ctype imported function to append
these indexes to registred variables in PLC debugger
"""
if idxs:
buff = ""
# keep a copy of requested idx
self._Idxs = idxs[:]
for idx,iectype,force in idxs:
idxstr = ctypes.string_at(
ctypes.pointer(
ctypes.c_uint32(idx)),4)
if force !=None:
c_type,unpack_func, pack_func = TypeTranslator.get(iectype, (None,None,None))
forced_type_size = ctypes.sizeof(c_type)
forced_type_size_str = chr(forced_type_size)
forcestr = ctypes.string_at(
ctypes.pointer(
pack_func(c_type,force)),
forced_type_size)
buff += idxstr + forced_type_size_str + forcestr
else:
buff += idxstr + chr(0)
else:
buff = ""
self._Idxs = []
self.HandleSerialTransaction(SET_TRACE_VARIABLETransaction(buff))
def GetTraceVariables(self):
"""
Return a list of variables, corresponding to the list of required idx
"""
offset = 0
strbuf = self.HandleSerialTransaction(
GET_TRACE_VARIABLETransaction())
if strbuf is not None and len(strbuf) > 4 and self.PLCStatus == "Started":
res=[]
size = len(strbuf) - 4
tick = ctypes.cast(
ctypes.c_char_p(strbuf[:4]),
ctypes.POINTER(ctypes.c_int)).contents
buff = ctypes.cast(
ctypes.c_char_p(strbuf[4:]),
ctypes.c_void_p)
for idx, iectype, forced in self._Idxs:
cursor = ctypes.c_void_p(buff.value + offset)
c_type,unpack_func, pack_func = TypeTranslator.get(iectype, (None,None,None))
if c_type is not None and offset < size:
res.append(unpack_func(ctypes.cast(cursor,
ctypes.POINTER(c_type)).contents))
offset += ctypes.sizeof(c_type)
else:
#if c_type is None:
#PLCprint("Debug error - " + iectype + " not supported !")
#if offset >= size:
#PLCprint("Debug error - buffer too small !")
break
if offset and offset == size:
return self.PLCStatus, tick.value, res
#PLCprint("Debug error - wrong buffer unpack !")
return self.PLCStatus, None, []