1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

#This file is part of Beremiz, a Integrated Development Environment for

     5

#programming IEC 61131-3 automates supporting plcopen standard and CanFestival. 

     6

#

     7

#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     8

#

     9

#See COPYING file for copyrights details.

    10

#

    11

#This library is free software; you can redistribute it and/or

    12

#modify it under the terms of the GNU General Public

    13

#License as published by the Free Software Foundation; either

    14

#version 2.1 of the License, or (at your option) any later version.

    15

#

    16

#This library is distributed in the hope that it will be useful,

    17

#but WITHOUT ANY WARRANTY; without even the implied warranty of

    18

#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    19

#General Public License for more details.

    20

#

    21

#You should have received a copy of the GNU General Public

    22

#License along with this library; if not, write to the Free Software

    23

#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    24

    25

import ctypes

    26

from LPCAppProto import *

    27

from LPCObject import *

    28

from targets.typemapping import  LogLevelsCount, TypeTranslator, UnpackDebugBuffer

    29

    30

class LPCAppObject(LPCObject):

    31

    def connect(self,comport):

    32

        self.SerialConnection = LPCAppProto(comport,#number

    33

                                         115200, #speed

    34

                                         2)      #timeout

    35

    36

    def StartPLC(self, debug=False):

    37

        self.HandleSerialTransaction(STARTTransaction())

    38

    39

    def StopPLC(self):

    40

        self.HandleSerialTransaction(STOPTransaction())

    41

        return True

    42

    43

    def ResetPLC(self):

    44

        self.HandleSerialTransaction(RESETTransaction())

    45

        return self.PLCStatus

    46

    47

    def GetPLCstatus(self):

    48

        strcounts = self.HandleSerialTransaction(GET_LOGCOUNTSTransaction())

    49

        if strcounts is not None and len(strcounts) == LogLevelsCount * 4:

    50

            cstrcounts = ctypes.create_string_buffer(strcounts)

    51

            ccounts = ctypes.cast(cstrcounts, ctypes.POINTER(ctypes.c_uint32))

    52

            counts = [int(ccounts[idx]) for idx in xrange(LogLevelsCount)]

    53

        else :

    54

            counts = [0]*LogLevelsCount

    55

        return self.PLCStatus, counts 

    56

    57

    def MatchMD5(self, MD5):

    58

        data = self.HandleSerialTransaction(GET_PLCIDTransaction())

    59

        if data is not None:

    60

            return data[:32] == MD5[:32]

    61

        return False

    62

    63

    def SetTraceVariablesList(self, idxs):

    64

        """

    65

        Call ctype imported function to append 

    66

        these indexes to registred variables in PLC debugger

    67

        """

    68

        if idxs:

    69

            buff = ""

    70

            # keep a copy of requested idx

    71

            self._Idxs = idxs[:]

    72

            for idx,iectype,force in idxs:

    73

                idxstr = ctypes.string_at(

    74

                          ctypes.pointer(

    75

                           ctypes.c_uint32(idx)),4)

    76

                if force !=None:

    77

                    c_type,unpack_func, pack_func = TypeTranslator.get(iectype, (None,None,None))

    78

                    forced_type_size = ctypes.sizeof(c_type)

    79

                    forced_type_size_str = chr(forced_type_size)

    80

                    forcestr = ctypes.string_at(

    81

                                ctypes.pointer(

    82

                                 pack_func(c_type,force)),

    83

                                 forced_type_size)

    84

                    buff += idxstr + forced_type_size_str + forcestr

    85

                else:

    86

                    buff += idxstr + chr(0)

    87

        else:

    88

            buff = ""

    89

            self._Idxs =  []

    90

    91

        self.HandleSerialTransaction(SET_TRACE_VARIABLETransaction(buff))

    92

    93

    def GetTraceVariables(self):

    94

        """

    95

        Return a list of variables, corresponding to the list of required idx

    96

        """

    97

        strbuf = self.HandleSerialTransaction(

    98

                                     GET_TRACE_VARIABLETransaction())

    99

        if strbuf is not None and len(strbuf) > 4 and self.PLCStatus == "Started":

   100

            size = len(strbuf) - 4

   101

            ctick = ctypes.create_string_buffer(strbuf[:4])

   102

            tick = ctypes.cast(ctick, ctypes.POINTER(ctypes.c_int)).contents

   103

            cbuff = ctypes.create_string_buffer(strbuf[4:])

   104

            buff = ctypes.cast(cbuff, ctypes.c_void_p)

   105

            TraceVariables = UnpackDebugBuffer(buff, size,  self._Idxs)

   106

            if TraceVariables is not None:

   108

        return self.PLCStatus, None, [] 

   109

   110

    def GetLogMessage(self, level, msgid):

   111

        strbuf = self.HandleSerialTransaction(GET_LOGMSGTransaction(level, msgid))

   112

        if strbuf is not None and len(strbuf) > 12:

   113

            cbuf = ctypes.cast(

   114

                          ctypes.c_char_p(strbuf[:12]),

   115

                          ctypes.POINTER(ctypes.c_uint32))

   116

            return (strbuf[12:],)+tuple(int(cbuf[idx]) for idx in range(3))

   117

        return None