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# -*- coding: utf-8 -*-
#
# AWL simulator - PyProfibus hardware interface
#
# Copyright 2013-2016 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_str("config",
defaultValue = "awlsimhw_pyprofibus.conf",
description = "Awlsim pyprofibus module config file."),
]
def __init__(self, sim, parameters={}):
AbstractHardwareInterface.__init__(self,
sim = sim,
parameters = parameters)
def __setupSlaves(self):
setPrmReq = self.pyprofibus.dp.DpTelegram_SetPrm_Req
dp1PrmMask = bytearray((setPrmReq.DPV1PRM0_FAILSAFE,
setPrmReq.DPV1PRM1_REDCFG,
0x00))
dp1PrmSet = bytearray((setPrmReq.DPV1PRM0_FAILSAFE,
setPrmReq.DPV1PRM1_REDCFG,
0x00))
for slaveConf in self.__conf.slaveConfs:
desc = self.pyprofibus.DpSlaveDesc(
identNumber = slaveConf.gsd.getIdentNumber(),
slaveAddr = slaveConf.addr)
desc.setCfgDataElements(slaveConf.gsd.getCfgDataElements())
if slaveConf.gsd.isDPV1():
desc.setUserPrmData(slaveConf.gsd.getUserPrmData(
dp1PrmMask = dp1PrmMask,
dp1PrmSet = dp1PrmSet))
else:
desc.setUserPrmData(slaveConf.gsd.getUserPrmData())
desc.setSyncMode(bool(slaveConf.syncMode))
desc.setFreezeMode(bool(slaveConf.freezeMode))
desc.setGroupMask(int(slaveConf.groupMask))
desc.setWatchdog(int(slaveConf.watchdogMs))
desc._awlsimSlaveConf = slaveConf
self.master.addSlave(desc)
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
import pyprofibus.phy_serial, pyprofibus.phy_dummy
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.__conf = self.pyprofibus.PbConf.fromFile(
self.getParamValueByName("config"))
phyType = self.__conf.phyType.lower().strip()
if phyType == "serial":
self.phy = self.pyprofibus.phy_serial.CpPhySerial(
debug = (self.__conf.debug >= 2),
port = self.__conf.phyDev)
elif phyType == "dummy_slave":
self.phy = self.pyprofibus.phy_dummy.CpPhyDummySlave(
debug = (self.__conf.debug >= 2))
else:
self.raiseException("Invalid phyType parameter value")
self.phy.setConfig(baudrate = self.__conf.phyBaud)
if self.__conf.dpMasterClass == 1:
DPM_cls = self.pyprofibus.DPM1
else:
DPM_cls = self.pyprofibus.DPM2
self.master = DPM_cls(phy = self.phy,
masterAddr = self.__conf.dpMasterAddr,
debug = (self.__conf.debug >= 1))
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()
except self.pyprofibus.conf.PbConfError as e:
self.raiseException("Profibus configuration 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
if not self.cachedInputs:
break
inputSize = slave._awlsimSlaveConf.inputSize
inData = self.cachedInputs.pop(0)
if not inData:
continue
if len(inData) > inputSize:
inData = inData[0:inputSize]
if len(inData) < inputSize:
inData += b'\0' * (inputSize - len(inData))
self.sim.cpu.storeInputRange(address, inData)
# Adjust the address base for the next slave.
address += inputSize
assert(not self.cachedInputs)
def writeOutputs(self):
try:
address = self.outputAddressBase
for slave in self.slaveList:
# Get the output data from the CPU
outputSize = slave._awlsimSlaveConf.outputSize
outData = self.sim.cpu.fetchOutputRange(address,
outputSize)
# Send it to the slave and request the input data.
inData = self.master.runSlave(slave, outData)
# Cache the input data for the readInputs() call.
self.cachedInputs.append(inData)
# Adjust the address base for the next slave.
address += outputSize
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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