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# -*- coding: utf-8 -*-
#
# AWL simulator - PyProfibus hardware interface
#
# Copyright 2013-2014 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.hardware import *
from awlsim.core.util import *
class HardwareInterface(AbstractHardwareInterface):
name = "PyProfibus"
# Hardware-specific parameters
paramDescs = [
HwParamDesc_int("debug",
minValue = 0,
description = "Debug level."),
HwParamDesc_int("baud",
defaultValue = 19200,
minValue = 9600, maxValue = 12000000,
description = "The PROFIBUS baud rate."),
HwParamDesc_int("masterClass",
defaultValue = 1,
minValue = 1, maxValue = 2,
description = "The DP-Master class."),
HwParamDesc_int("masterAddr",
defaultValue = 1,
minValue = 0, maxValue = 126,
description = "The DP-Address of the master."),
HwParamDesc_int("spiDev",
minValue = 0,
description = "The SPI device number."),
HwParamDesc_int("spiChip",
minValue = 0,
description = "The SPI device chip-select number."),
]
def __init__(self, sim, parameters={}):
AbstractHardwareInterface.__init__(self,
sim = sim,
parameters = parameters)
def __setupSlaves(self):
#TODO: Rewrite. Must be configurable.
et200s = self.pyprofibus.DpSlaveDesc(identNumber = 0x806A,
slaveAddr = 8,
inputAddressRangeSize = 1,
outputAddressRangeSize = 2)
for elem in (self.pyprofibus.DpCfgDataElement(0),
self.pyprofibus.DpCfgDataElement(0x20),
self.pyprofibus.DpCfgDataElement(0x20),
self.pyprofibus.DpCfgDataElement(0x10)):
et200s.chkCfgTelegram.addCfgDataElement(elem)
et200s.setPrmTelegram.addUserPrmData([0x11 | 0x40])
et200s.setSyncMode(True)
et200s.setFreezeMode(True)
et200s.setGroupMask(1)
et200s.setWatchdog(5000)
self.master.addSlave(et200s)
def __cleanup(self):
if self.master:
self.master.destroy()
self.master = None
self.phy = None
self.cachedInputs = []
def doStartup(self):
# Import the PROFIBUS hardware access modules
# and keep references to it.
try:
import pyprofibus
self.pyprofibus = pyprofibus
except (ImportError, RuntimeError) as e:
self.raiseException("Failed to import PROFIBUS protocol stack "
"module 'pyprofibus':\n%s" % str(e))
# Initialize the DPM
self.phy = None
self.master = None
try:
self.phy = self.pyprofibus.CpPhy(device = self.getParam("spiDev"),
chipselect = self.getParam("spiChip"),
debug = True if (self.getParam("debug") >= 2) else False)
self.phy.profibusSetPhyConfig(baudrate = self.getParam("baud"))
if self.getParam("masterClass") == 1:
DPM_cls = self.pyprofibus.DPM1
else:
DPM_cls = self.pyprofibus.DPM2
self.master = DPM_cls(phy = self.phy,
masterAddr = self.getParam("masterAddr"),
debug = True if (self.getParam("debug") >= 1) else False)
self.__setupSlaves()
self.master.initialize()
self.slaveList = self.master.getSlaveList()
self.cachedInputs = [None] * len(self.slaveList)
except self.pyprofibus.PhyError as e:
self.raiseException("Profibus-PHY error: %s" % str(e))
self.__cleanup()
except self.pyprofibus.DpError as e:
self.raiseException("Profibus-DP error: %s" % str(e))
self.__cleanup()
except self.pyprofibus.FdlError as e:
self.raiseException("Profibus-FDL error: %s" % str(e))
self.__cleanup()
def doShutdown(self):
self.__cleanup()
def readInputs(self):
address = self.inputAddressBase
for slave in self.slaveList:
# Get the cached slave-data
inData = self.cachedInputs.pop(0)
if not inData:
continue
if len(inData) != slave.inputAddressRangeSize:
self.raiseException("Input data from slave '%s' has "
"invalid length %d (expected %d)" %\
(str(slave), len(inData),
slave.inputAddressRangeSize))
self.sim.cpu.storeInputRange(address, inData)
# Adjust the address base for the next slave.
address += slave.inputAddressRangeSize
assert(not self.cachedInputs)
def writeOutputs(self):
try:
address = self.outputAddressBase
for slave in self.slaveList:
# Get the output data from the CPU
outData = self.sim.cpu.fetchOutputRange(address,
slave.outputAddressRangeSize)
# Send it to the slave and request the input data.
inData = self.master.dataExchange(slave.slaveAddr,
outData)
# Cache the input data for the readInputs() call.
self.cachedInputs.append(inData)
# Adjust the address base for the next slave.
address += slave.outputAddressRangeSize
except self.pyprofibus.ProfibusError as e:
self.raiseException("Hardware error: %s" % str(e))
def directReadInput(self, accessWidth, accessOffset):
return None#TODO
def directWriteOutput(self, accessWidth, accessOffset, data):
return False#TODO
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