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# -*- coding: utf-8 -*-
#
# AWL simulator - Organization Block temp variable presets
#
# 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 __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
import math
from awlsim.core.util import *
class OBTempPresets(object):
"""Abstract Organization Block temporary-variable presets handler."""
def __init__(self, obNumber, cpu):
self.obNumber = obNumber
self.cpu = cpu
def tempUnderflow(self):
raise AwlSimError("Localdata (TEMP) area in "
"OB %d is too small." % self.obNumber)
# Write the TempPresets.
# localdata is the TEMP-data array.
# This method is to be overloaded in the subclass.
def generate(self, localdata):
raise NotImplementedError
class OBTempPresets_dummy(OBTempPresets):
"""Dummy-presets handler. This handler does nothing."""
def __init__(self, cpu):
OBTempPresets.__init__(self, -1, cpu)
def generate(self, localdata):
pass
class OB1TempPresets(OBTempPresets):
"""OB 1 temp-presets handler."""
def __init__(self, cpu):
OBTempPresets.__init__(self, 1, cpu)
def generate(self, localdata):
cpu, ceil = self.cpu, math.ceil
try:
avgMs = min(0x7FFF, int(ceil(cpu.avgCycleTime * 1000)))
minMs = min(0x7FFF, int(ceil(cpu.minCycleTime * 1000)))
maxMs = min(0x7FFF, int(ceil(cpu.maxCycleTime * 1000)))
# Sanitize times
minMs = min(minMs, maxMs)
avgMs = min(max(avgMs, minMs), maxMs)
# Byte 0: OB1_EV_CLASS
localdata[0] = 0x11
# Byte 1: OB1_SCAN_1
localdata[1] = 0x03
# Byte 2: OB1_PRIORITY
localdata[2] = 0x01
# Byte 3: OB1_OB_NUMBR
localdata[3] = 0x01
# Byte 4: OB1_RESERVED_1
localdata[4] = 0x00
# Byte 5: OB1_RESERVED_2
localdata[5] = 0x00
# Byte 6-7: OB1_PREV_CYCLE
# We write the average cycle time instead
# of the previous cycle time,
# because we don't measure each cycle.
localdata[6] = (avgMs >> 8) & 0xFF
localdata[7] = avgMs & 0xFF
# Byte 8-9: OB1_MIN_CYCLE
localdata[8] = (minMs >> 8) & 0xFF
localdata[9] = minMs & 0xFF
# Byte 10-11: OB1_MAX_CYCLE
localdata[10] = (maxMs >> 8) & 0xFF
localdata[11] = maxMs & 0xFF
# Byte 12-19: OB1_DATE_TIME
cpu.makeCurrentDateAndTime(localdata, 12)
except IndexError:
self.tempUnderflow()
OBTempPresets_table = {
1 : OB1TempPresets,
}
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