#!/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 *
class LPCAppObject(LPCObject):
def connect(self,comport):
self.SerialConnection = LPCAppProto(comport,#number
115200, #speed
2) #timeout
self.HandleSerialTransaction(IDLETransaction())
def HandleSerialTransaction(self, transaction):
if self.SerialConnection is not None:
try:
self.PLCStatus, res = self.SerialConnection.HandleTransaction(transaction)
return res
except LPCProtoError,e:
self.pluginsroot.logger.write_error(str(e)+"\n")
self.SerialConnection = None
self.PLCStatus = "Disconnected"
return None
def StartPLC(self, debug=False):
self.HandleSerialTransaction(STARTTransaction())
def StopPLC(self):
self.HandleSerialTransaction(STOPTransaction())
def ResetPLC(self):
self.HandleSerialTransaction(RESETTransaction())
return self.PLCStatus
def GetPLCstatus(self):
self.HandleSerialTransaction(IDLETransaction())
return self.PLCStatus
def MatchMD5(self, MD5):
data = self.HandleSerialTransaction(GET_PLCIDTransaction())
return data[:32] == MD5
class IEC_STRING(ctypes.Structure):
"""
Must be changed according to changes in iec_types.h
"""
_fields_ = [("len", ctypes.c_uint8),
("body", ctypes.c_char * 126)]
TypeTranslator = {"BOOL" : (ctypes.c_uint8, lambda x:x.value!=0, lambda t,x:t(x)),
"STEP" : (ctypes.c_uint8, lambda x:x.value, lambda t,x:t(x)),
"TRANSITION" : (ctypes.c_uint8, lambda x:x.value, lambda t,x:t(x)),
"ACTION" : (ctypes.c_uint8, lambda x:x.value, lambda t,x:t(x)),
"SINT" : (ctypes.c_int8, lambda x:x.value, lambda t,x:t(x)),
"USINT" : (ctypes.c_uint8, lambda x:x.value, lambda t,x:t(x)),
"BYTE" : (ctypes.c_uint8, lambda x:x.value, lambda t,x:t(x)),
"STRING" : (IEC_STRING, lambda x:x.body[:x.len], lambda t,x:t(len(x),x)),
"INT" : (ctypes.c_int16, lambda x:x.value, lambda t,x:t(x)),
"UINT" : (ctypes.c_uint16, lambda x:x.value, lambda t,x:t(x)),
"WORD" : (ctypes.c_uint16, lambda x:x.value, lambda t,x:t(x)),
"WSTRING" : (None, None, None),#TODO
"DINT" : (ctypes.c_int32, lambda x:x.value, lambda t,x:t(x)),
"UDINT" : (ctypes.c_uint32, lambda x:x.value, lambda t,x:t(x)),
"DWORD" : (ctypes.c_uint32, lambda x:x.value, lambda t,x:t(x)),
"LINT" : (ctypes.c_int64, lambda x:x.value, lambda t,x:t(x)),
"ULINT" : (ctypes.c_uint64, lambda x:x.value, lambda t,x:t(x)),
"LWORD" : (ctypes.c_uint64, lambda x:x.value, lambda t,x:t(x)),
"REAL" : (ctypes.c_float, lambda x:x.value, lambda t,x:t(x)),
"LREAL" : (ctypes.c_double, lambda x:x.value, lambda t,x:t(x)),
}
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(length)),4)
if force !=None:
c_type,unpack_func, pack_func = self.TypeTranslator.get(iectype, (None,None,None))
forcedsizestr = chr(ctypes.sizeof(c_type))
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)
data = self.HandleSerialTransaction(
SET_TRACE_VARIABLETransaction(buff))
else:
self._Idxs = []
def GetTraceVariables(self):
"""
Return a list of variables, corresponding to the list of required idx
"""
offset = 0
strbuf = self.HandleSerialTransaction(
GET_TRACE_VARIABLETransaction())
size = len(strbuf) - 4
if size > 0 and self.PLCStatus == "Started":
tick = ctypes.cast(
ctypes.c_char_p(strbuf[:4]),
ctypes.POINTER(ctypes.c_int)).contents
buffer = ctypes.cast(
ctypes.c_char_p(strbuf[4:]),
ctypes.c_void_p)
for idx, iectype, forced in self._Idxs:
cursor = ctypes.c_void_p(buffer.value + offset)
c_type,unpack_func, pack_func = self.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, None