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#!/usr/bin/env python3
#
# Simple pyprofibus dummy example using dummy PHY.
# This example can be run without any PB hardware.
#
import sys
sys.path.insert(0, "..")
import pyprofibus
def main(confdir=".", watchdog=None):
master = None
try:
# Parse the config file.
config = pyprofibus.PbConf.fromFile(confdir + "/example_dummy_twoslaves.conf")
# Create a DP master.
master = config.makeDPM()
# Create the slave descriptions.
outData = {}
for slaveConf in config.slaveConfs:
slaveDesc = slaveConf.makeDpSlaveDesc()
# Set User_Prm_Data
dp1PrmMask = bytearray((pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
dp1PrmSet = bytearray((pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
slaveDesc.setUserPrmData(slaveConf.gsd.getUserPrmData(dp1PrmMask=dp1PrmMask,
dp1PrmSet=dp1PrmSet))
# Register the slave at the DPM
master.addSlave(slaveDesc)
# Set initial output data.
outData[slaveDesc.name] = bytearray((0x42, 0x24))
# Initialize the DPM
master.initialize()
# Run the slave state machine.
while True:
# Write the output data.
for slaveDesc in master.getSlaveList():
slaveDesc.setMasterOutData(outData[slaveDesc.name])
# Run slave state machines.
handledSlaveDesc = master.run()
# Get the in-data (receive)
if handledSlaveDesc:
inData = handledSlaveDesc.getMasterInData()
if inData is not None:
# In our example the output data shall be the inverted input.
outData[handledSlaveDesc.name][0] = inData[1]
outData[handledSlaveDesc.name][1] = inData[0]
# Feed the system watchdog, if it is available.
if watchdog is not None:
watchdog()
except pyprofibus.ProfibusError as e:
print("Terminating: %s" % str(e))
return 1
finally:
if master:
master.destroy()
return 0
if __name__ == "__main__":
import sys
sys.exit(main())
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