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# -*- coding: utf-8 -*-
#
# AWL simulator - SFCs
#
# Copyright 2012-2013 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 awlsim.systemblocks import *
from awlsim.util import *
class SFCm1(SFC):
"""SFC -1: __NOP"""
def __init__(self, cpu):
SFC.__init__(self, cpu, -1)
def run(self):
pass # No operation
class SFCm2(SFC):
"""SFC -2: __REBOOT"""
def __init__(self, cpu):
SFC.__init__(self, cpu, -2)
self.interface.addField_IN(
BlockInterface.Field(name = "REBOOT_TYPE",
dataType = AwlDataType.makeByName("INT"))
)
def run(self):
rebootType = wordToSignedPyInt(self.fetchInterfaceFieldByName("REBOOT_TYPE"))
if rebootType == 1:
raise MaintenanceRequest(MaintenanceRequest.TYPE_SOFTREBOOT,
"SFC -2 soft reboot request")
else:
raise AwlSimError("SFC -2: Unknown REBOOT_TYPE %d" % rebootType)
class SFCm3(SFC):
"""SFC -3: __SHUTDOWN"""
def __init__(self, cpu):
SFC.__init__(self, cpu, -3)
self.interface.addField_IN(
BlockInterface.Field(name = "SHUTDOWN_TYPE",
dataType = AwlDataType.makeByName("INT"))
)
def run(self):
shutdownType = wordToSignedPyInt(self.fetchInterfaceFieldByName("SHUTDOWN_TYPE"))
if shutdownType == 1:
raise MaintenanceRequest(MaintenanceRequest.TYPE_SHUTDOWN,
"SFC -3 shutdown request")
else:
raise AwlSimError("SFC -3: Unknown SHUTDOWN_TYPE %d" % shutdownType)
class SFC64(SFC):
"""SFC 64: TIME_TCK"""
def __init__(self, cpu):
SFC.__init__(self, cpu, 64)
self.interface.addField_OUT(
BlockInterface.Field(name = "RET_VAL",
dataType = AwlDataType.makeByName("TIME"))
)
def run(self):
# Return a 31-bit millisecond representation of "now".
self.storeInterfaceFieldByName("RET_VAL",
int(self.cpu.now * 1000) & 0x7FFFFFFF)
SFC_table = {
-1 : SFCm1,
-2 : SFCm2,
-3 : SFCm3,
64 : SFC64,
}
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