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1 #!/usr/bin/env python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 #This file is part of Beremiz, a Integrated Development Environment for |
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5 #programming IEC 61131-3 automates supporting plcopen standard and CanFestival. |
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6 # |
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7 #Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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8 # |
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9 #See COPYING file for copyrights details. |
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10 # |
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11 #This library is free software; you can redistribute it and/or |
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12 #modify it under the terms of the GNU General Public |
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13 #License as published by the Free Software Foundation; either |
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14 #version 2.1 of the License, or (at your option) any later version. |
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15 # |
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16 #This library is distributed in the hope that it will be useful, |
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17 #but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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19 #General Public License for more details. |
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20 # |
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21 #You should have received a copy of the GNU General Public |
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22 #License along with this library; if not, write to the Free Software |
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23 #Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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24 |
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25 from threading import Timer, Thread, Lock |
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26 import ctypes, os, commands, types, sys |
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27 import traceback |
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28 |
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29 class LPCObject(): |
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30 _Idxs = [] |
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31 def __init__(self,pluginsroot): |
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32 self.PLCStatus = "Stopped" |
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33 self.pluginsroot = pluginsroot |
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34 self.PLCprint = pluginsroot.logger.write |
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35 |
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36 def StartPLC(self, debug=False): |
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37 PLCprint("StartPLC") |
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38 if self.CurrentPLCFilename is not None: |
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39 self.PLCStatus = "Started" |
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40 self.PythonThread = Thread(target=self.PythonThreadProc, args=[debug]) |
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41 self.PythonThread.start() |
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42 |
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43 def StopPLC(self): |
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44 PLCprint("StopPLC") |
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45 if self.PLCStatus == "Started": |
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46 self._stopPLC() |
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47 return True |
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48 return False |
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49 |
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50 def ForceReload(self): |
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51 # respawn python interpreter |
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52 Timer(0.1,self._Reload).start() |
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53 return True |
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54 |
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55 def GetPLCstatus(self): |
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56 return self.PLCStatus |
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57 |
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58 def NewPLC(self, md5sum, data, extrafiles): |
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59 PLCprint("NewPLC (%s)"%md5sum) |
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60 if self.PLCStatus in ["Stopped", "Empty", "Broken"]: |
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61 NewFileName = md5sum + lib_ext |
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62 extra_files_log = os.path.join(self.workingdir,"extra_files.txt") |
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63 try: |
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64 os.remove(os.path.join(self.workingdir, |
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65 self.CurrentPLCFilename)) |
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66 for filename in file(extra_files_log, "r").readlines() + [extra_files_log]: |
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67 try: |
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68 os.remove(os.path.join(self.workingdir, filename.strip())) |
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69 except: |
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70 pass |
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71 except: |
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72 pass |
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73 |
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74 try: |
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75 # Create new PLC file |
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76 open(os.path.join(self.workingdir,NewFileName), |
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77 'wb').write(data) |
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78 |
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79 # Store new PLC filename based on md5 key |
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80 open(self._GetMD5FileName(), "w").write(md5sum) |
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81 |
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82 # Then write the files |
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83 log = file(extra_files_log, "w") |
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84 for fname,fdata in extrafiles: |
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85 fpath = os.path.join(self.workingdir,fname) |
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86 open(fpath, "wb").write(fdata) |
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87 log.write(fname+'\n') |
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88 |
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89 # Store new PLC filename |
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90 self.CurrentPLCFilename = NewFileName |
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91 except: |
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92 PLCprint(traceback.format_exc()) |
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93 return False |
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94 if self.PLCStatus == "Empty": |
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95 self.PLCStatus = "Stopped" |
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96 return True |
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97 return False |
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98 |
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99 def MatchMD5(self, MD5): |
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100 try: |
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101 last_md5 = open(self._GetMD5FileName(), "r").read() |
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102 return last_md5 == MD5 |
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103 except: |
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104 return False |
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105 |
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106 def SetTraceVariablesList(self, idxs): |
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107 """ |
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108 Call ctype imported function to append |
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109 these indexes to registred variables in PLC debugger |
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110 """ |
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111 self._suspendDebug() |
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112 # keep a copy of requested idx |
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113 self._Idxs = idxs[:] |
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114 self._ResetDebugVariables() |
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115 for idx in idxs: |
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116 self._RegisterDebugVariable(idx) |
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117 self._resumeDebug() |
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118 |
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119 class IEC_STRING(ctypes.Structure): |
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120 """ |
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121 Must be changed according to changes in iec_types.h |
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122 """ |
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123 _fields_ = [("len", ctypes.c_uint8), |
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124 ("body", ctypes.c_char * 127)] |
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125 |
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126 TypeTranslator = {"BOOL" : (ctypes.c_uint8, lambda x:x.value!=0), |
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127 "STEP" : (ctypes.c_uint8, lambda x:x.value), |
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128 "TRANSITION" : (ctypes.c_uint8, lambda x:x.value), |
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129 "ACTION" : (ctypes.c_uint8, lambda x:x.value), |
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130 "SINT" : (ctypes.c_int8, lambda x:x.value), |
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131 "USINT" : (ctypes.c_uint8, lambda x:x.value), |
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132 "BYTE" : (ctypes.c_uint8, lambda x:x.value), |
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133 "STRING" : (IEC_STRING, lambda x:x.body[:x.len]), |
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134 "INT" : (ctypes.c_int16, lambda x:x.value), |
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135 "UINT" : (ctypes.c_uint16, lambda x:x.value), |
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136 "WORD" : (ctypes.c_uint16, lambda x:x.value), |
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137 "WSTRING" : (None, None),#TODO |
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138 "DINT" : (ctypes.c_int32, lambda x:x.value), |
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139 "UDINT" : (ctypes.c_uint32, lambda x:x.value), |
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140 "DWORD" : (ctypes.c_uint32, lambda x:x.value), |
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141 "LINT" : (ctypes.c_int64, lambda x:x.value), |
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142 "ULINT" : (ctypes.c_uint64, lambda x:x.value), |
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143 "LWORD" : (ctypes.c_uint64, lambda x:x.value), |
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144 "REAL" : (ctypes.c_float, lambda x:x.value), |
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145 "LREAL" : (ctypes.c_double, lambda x:x.value), |
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146 } |
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147 |
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148 def GetTraceVariables(self): |
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149 """ |
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150 Return a list of variables, corresponding to the list of required idx |
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151 """ |
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152 if self.PLCStatus == "Started": |
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153 self.PLClibraryLock.acquire() |
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154 tick = self._WaitDebugData() |
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155 #PLCprint("Debug tick : %d"%tick) |
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156 if tick == 2**32 - 1: |
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157 tick = -1 |
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158 res = None |
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159 else: |
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160 idx = ctypes.c_int() |
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161 typename = ctypes.c_char_p() |
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162 res = [] |
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163 |
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164 for given_idx in self._Idxs: |
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165 buffer=self._IterDebugData(ctypes.byref(idx), ctypes.byref(typename)) |
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166 c_type,unpack_func = self.TypeTranslator.get(typename.value, (None,None)) |
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167 if c_type is not None and given_idx == idx.value: |
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168 res.append(unpack_func(ctypes.cast(buffer, |
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169 ctypes.POINTER(c_type)).contents)) |
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170 else: |
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171 PLCprint("Debug error idx : %d, expected_idx %d, type : %s"%(idx.value, given_idx,typename.value)) |
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172 res.append(None) |
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173 self._FreeDebugData() |
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174 self.PLClibraryLock.release() |
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175 return tick, res |
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176 return -1, None |
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177 |