Rest bus simulation scripting API

Contents

• Rest bus simulation scripting API

  • Prerequisites

  • Creating ECU nodes by Drag and Drop

  • ECU Node properties

  • Starting and stopping ECU nodes

  • Auto fire functionality

  • Activating and deactivation services

  • Properties of services, methods, events, fields and eventgroups

  • Example using trigger() method

  • Example using on_value_changed() method

  • Example using call() method

  • Example using on_method_called() method

  • Example using on_receiving() method

Prerequisites

Create a new project and configure the Hardware device(s) as a first step.

Creating ECU nodes by Drag and Drop

After adding an Ethernet database, drag and drop an ECU to the Nodes element.

ECU Node properties

Select the created ECU node and open the Properties View to show and change the adjustments to simulate the ECU:

• Ip and MAC addresses

• Vlan

• Used port

• Activation/deactivation of

  1. SOME/IP manager

  2. SOME/IP-SD manager

  3. ARP responder

  4. ICMP responder

• Use packetizing for sending SOME/IP Events

• Cyclic auto fire including the delays

  

Starting and stopping ECU nodes

There are three ways on how to start and stop ECU nodes:

1. Start all ECU nodes via context menu of Nodes element.

2. Start only one ECU node via context menu of an ECU node.

3. Start Nodes in scripts.

Auto fire functionality

Auto fire: Feature for sending cyclically SOME/IP events

1. The delay can be specified on ECU level, service level and/or event level

• Priority is as follows: event > service > ecu

2. The activation of this feature is set only on event level via the property Auto Fire

• By default this feature is enabled

• But the Auto Fire Delay is set to 0 ms, which means deactivated

Activating and deactivation services

• By default all services of the ECU node are deactivated, i.e. after the creation of a node, the user should activate the needed services. Otherwise nothing will happen when simulation is started

• Each service, method, event, field and eventgroup has an enable flag which specifies whether the element is activated or not

• In order to activate everything, right click on the provided and/ or consumed services element and select Activate all

  Activate all	Activate all the services including its events, methods, fields and event groups
  Deactivate all	De-activates all services including its events, methods, fields and event groups
  Activate all services	Activates only the services without their events, etc
  Deactivate all services	Deactivates all services

Properties of services, methods, events, fields and eventgroups

• Each service, method, event, field and event group has further information which is read out of the Fibex file and is used during the simulation

• This does not only include the timings for the startup and the main phase, but also the IP, ports, etc.

Figure 1: Service Properties

Figure 2: Method Properties

Figure 3: Field Properties

Figure 4: Event Properties

Figure 5: Event Group Properties

Example using trigger() method

from time import sleep
# enable service EnhancedTestabilityServiceHigh
ECU.enable("EnhancedTestabilityServiceHigh")
TESTER.enable("EnhancedTestabilityServiceHigh")
# enable Field InterfaceVersion
ECU.enable("EnhancedTestabilityServiceHigh.InterfaceVersion")
TESTER.enable("EnhancedTestabilityServiceHigh.InterfaceVersion")
print("Starting RBS node using the start() method")
ECU.start()
TESTER.start()
sleep(2)
print("triggering field")
ECU.trigger("EnhancedTestabilityServiceHigh.InterfaceVersion")
sleep(2)
# disable service EnhancedTestabilityServiceHigh
ECU.disable("EnhancedTestabilityServiceHigh")
TESTER.disable("EnhancedTestabilityServiceHigh")
# disable Field InterfaceVersion
ECU.disable("EnhancedTestabilityServiceHigh.InterfaceVersion")
TESTER.disable("EnhancedTestabilityServiceHigh.InterfaceVersion")
ECU.stop()
TESTER.stop()

Example using on_value_changed() method

from time import sleep
# --Functions
def on_value_changed(ecu, evt):
    global serv_name, old_val, new_val
    if evt.match("EnhancedTestabilityServiceHigh.InterfaceVersion"):
        print(evt.service_name)
        serv_name = evt.service_name
        print("old value")
        print(evt.old_value)
        old_val = evt.old_value
        print("new value")
        print(evt.new_value)
        new_val = evt.new_value

# Enable the service EnhancedTestabilityServiceHigh
ECU.enable("EnhancedTestabilityServiceHigh")
TESTER.enable("EnhancedTestabilityServiceHigh")
# Enable the field InterfaceVersion
ECU.enable("EnhancedTestabilityServiceHigh.InterfaceVersion")
TESTER.enable("EnhancedTestabilityServiceHigh.InterfaceVersion")
print("Starting RBS node using the start() method")
ECU.start()
TESTER.start()
sleep(2)
value = {'majorVersion': 2, 'minorVersion': 3}
TESTER.on_value_changed += on_value_changed
ECU.set_value("EnhancedTestabilityServiceHigh.InterfaceVersion", value)
ECU.trigger("EnhancedTestabilityServiceHigh.InterfaceVersion")
sleep(5)
# disable the service EnhancedTestabilityServiceHigh
ECU.disable("EnhancedTestabilityServiceHigh")
TESTER.disable("EnhancedTestabilityServiceHigh")
# disable the field InterfaceVersion
ECU.disable("EnhancedTestabilityServiceHigh.InterfaceVersion")
TESTER.disable("EnhancedTestabilityServiceHigh.InterfaceVersion")
ECU.stop()
TESTER.stop()

Example using call() method

from time import sleep
# enable service EnhancedTestabilityServiceHigh
ECU.enable('EnhancedTestabilityServiceHigh')
TESTER.enable('EnhancedTestabilityServiceHigh')
# enable method checkByteOrder
ECU.enable('EnhancedTestabilityServiceHigh.checkByteOrder')
TESTER.enable('EnhancedTestabilityServiceHigh.checkByteOrder')

print("Starting RBS node using the start() method")
ECU.start()
TESTER.start()
sleep(3)
ret = TESTER.call('EnhancedTestabilityServiceHigh.checkByteOrder', {'summandUINT8':2, 'summandUINT16':4})
print(ret)
sleep(3)
# disable service EnhancedTestabilityServiceHigh
ECU.disable('EnhancedTestabilityServiceHigh')
TESTER.disable('EnhancedTestabilityServiceHigh')
# disable field checkByteOrder
ECU.disable('EnhancedTestabilityServiceHigh.checkByteOrder')
TESTER.disable('EnhancedTestabilityServiceHigh.checkByteOrder')
ECU.stop()
TESTER.stop()

Example using on_method_called() method

# coding: utf-8
from time import sleep
def on_method_called(ecu, call):
    if call.match("EnhancedTestabilityServiceLow.echoENUM"):
        print(call.service_name)
        print(call.request)
        call.response = {'enumerationReturnElement': 'One'}
        
ECU.enable("EnhancedTestabilityServiceLow")
TESTER.enable("EnhancedTestabilityServiceLow")

ECU.enable('EnhancedTestabilityServiceLow.echoENUM')
TESTER.enable('EnhancedTestabilityServiceLow.echoENUM')

ECU.start()
TESTER.start()
ECU.on_method_called +=on_method_called
sleep(3)
response = TESTER.call('EnhancedTestabilityServiceLow.echoENUM', {'enumerationElement': 'Four'})
print(response)
sleep(5)
ECU.disable("EnhancedTestabilityServiceLow")
TESTER.disable("EnhancedTestabilityServiceLow")
ECU.disable("EnhancedTestabilityServiceLow.echoENUM")
TESTER.disable("EnhancedTestabilityServiceLow.echoENUM")
ECU.stop()
TESTER.stop()
    

Example using on_receiving() method

def on_receiving(ecu, e):
    if e.protocol == "someip":
        if ecu.port_connection.vlan.outer_vlan != e.message.vlan_tag.outer_vlan:
            e.message = None

ecus = [ECU, TESTER, ECU_1, TESTER_1]

try:
    for ecu in ecus:
        ecu.on_receiving +=on_receiving
    tc_wait_for_return()
finally:
    for ecu in ecus:
        ecu.on_receiving -=on_receiving