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# -*- coding: utf-8 -*-
#
# AWL simulator - System-blocks
#
# Copyright 2012-2015 Michael Buesch <m@bues.ch>
#
# This program 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 of the License, or
# (at your option) any later version.
#
# This program 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 program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
#from awlsim.core.instructions.insn_generic_call cimport * #@cy
from awlsim.core.instructions.insn_generic_call import * #@nocy
from awlsim.core.systemblocks.error_codes import *
from awlsim.core.blocks import *
from awlsim.core.identifier import *
from awlsim.awlcompiler.translator import *
class SystemBlock(StaticCodeBlock):
# The block identification. To be overridden by the subclass.
# The tuple is: (number, name, short_description)
name = (-1, "<unknown>", None)
BLOCKTYPESTR = "SystemBlock"
isSystemBlock = True
def __init__(self, cpu, interface):
insns = [
AwlInsn_GENERIC_CALL(cpu, self.run),
]
StaticCodeBlock.__init__(self, insns, self.name[0], interface)
self.cpu = cpu
def run(self):
# Reimplement this method
raise NotImplementedError
# Fetch the value of a block-interface field.
def fetchInterfaceFieldByName(self, name):
return self.cpu.fetch(self.__interfaceOpers[name])
# Store a value to a block-interface field.
def storeInterfaceFieldByName(self, name, value):
return self.cpu.store(self.__interfaceOpers[name], value)
# Resolve hard wired symbolic accesses
# (i.e. accesses not done in AWL instructions)
def resolveSymbols(self):
super(SystemBlock, self).resolveSymbols()
resolver = AwlSymResolver(self.cpu)
self.__interfaceOpers = {}
for field in self.interface.fields_IN_OUT_INOUT_STAT:
# Create a scratch-operator for the access.
offset = AwlOffset(None, None)
offset.identChain = AwlDataIdentChain.parseString(field.name)
oper = AwlOperator(AwlOperator.NAMED_LOCAL, 0,
offset)
# Resolve the scratch-operator.
oper = resolver.resolveNamedLocal(block=self, insn=None,
oper=oper, pointer=False)
# Store the scratch operator for later use.
self.__interfaceOpers[field.name] = oper
class SFBInterface(FBInterface):
pass
class SFB(SystemBlock):
"""SFB base class.
"""
BLOCKTYPESTR = "SFB"
isFB = True
def __init__(self, cpu):
SystemBlock.__init__(self, cpu, SFBInterface())
class SFCInterface(FCInterface):
pass
class SFC(SystemBlock):
"""SFC base class.
"""
BLOCKTYPESTR = "SFC"
isFC = True
def __init__(self, cpu):
SystemBlock.__init__(self, cpu, SFCInterface())
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