uRTEDemo_03_Nucleo-F446RE_SystemStates_10_Model

SignalEventObject

button_edge

Fired whenever the button is pressed (but not if it is released)

Diagrams

Relationships

Requirements Model
Logical Function Model
Software Model
Hardware Model

Safety

Required
The highest SIL derived from SafetyRequirements.
SIL derived 		QM
This attribute allows to overwrite the derived SIL level. The result is the SIL effective attribute.
SIL manual 		derived
The reason why the derived SIL is ignored and an explicit SIL is set.
reason
The SIL required for this implementation unit is defined by the derived SIL but can be overwritten by "SIL manual".
SIL required 		QM
Achieved
The achieved SIL for this implementation unit. Has to be provided by the user.
SIL achieved 		QM
A justification why a certain SIL was achieved.
justification

Properties

Base
The name of this object. Certain classes of objects require this field to be unique. Please consider that this field might be used in code and thus must not contain special characters.
Name 		button_edge
The type of this object within the uRTE model
Type 		SignalEventObject
A descriptive text for this object. Please consider that this field might be used in code and thus must not contain special characters.
Description

Fired whenever the button is pressed (but not if it is released)
A user defined ID which can be freely chosen. Please consider that this field might be used in code and thus must not contain special characters.
User-ID 		SignalEventObject_57
Each object within the uRTE model has a unique ID, this is the ID for this object
UID 		_29lu0OZoEeyZ2OzYlvU4PA
signal configuration
The minimum age of the signal. If the value is other than 0 then the signal will not be valid if the minimum age is not reached.
miminum Age 		0
The maximum age of the signal. If the value is other than 0 then the signal will not be valid if the maximum age is reached.
maximum Age 		0
Lokal signals are stored in all stacks of all tasks using them, global signals are stored as global data-objects.
Storage (isLocal) 		local signal
if the checksum feature is enabled, the signals content (meta-data and payload) will be protected by a user defined hash alogrithm. The hash is calculated after every write operation to the signal and is checked with every read operation.
Checksum 		false
Depending on how a signal is configured and used, the generator can decide wether an change of the signal shall be signaled by sending a trigger or a deep copy of the signal to the corresponding tasks. If this flag is set, the generator will choose deep copy sychronization over notification where possible.
Force Sync 		false
Determines if the signal code shall be inlined. Might be overwritten by the Signalpool or the SignalLayer
Inline 		false
The inline property might be overwritten by the signalPool or the SignalLayer. This is the effective inline.
effective inline 		false
If this flag is set, an API will be generated with which the signal can be used from an ISR context. This option works along with the global "signal_ISR_API" option.
Has ISR API 		false
The ISR property might be overwritten by the global configuration. This is the effective ISR API status.
effective ISR API 		deactivated for all signals
Triggers

OnTrigger (1)

TriggerPorts associated with this event signal.

Port Events Signal event source Container Task Guard Order
Runnable_run_UART_WakeUP

If an event comes in, the runnable shall switch the state to UART to start the periodic sending
run_UART_wakeUp UART
0

Requirement Layer

Hazard Scenarios (1)

Hazard Scenarios for associated Hazardous Events.

Hazard Scenario Parent Hazard Events
Potential customers don't like the tool

This would be very sad.

Hazardous Events (2)

Hazardous Events for associated Safety Goals.

Hazardous Event Parent Probability Controllability Effect SIL Safety-Goals
Complexity

The user might think µRTE is hard to use.

 QM
Unknown features

The customer might not see the full spectrum of features µRTE comes with.

 QM

Safetygoals (1)

Safety Goals linking to the Requirements.

Safety Goal Parent Function Type SIL derived SIL manual SIL required Safe State Safety Requirements
Show most important features in an lightweight demo

An small demo model with the most important features shall show the most important features of µRTE.

 System_Function QM derived QM Show slides

(Safety)Requirements (1)

Requirements referencing to signal button_edge.

(Safety)Requirement Parent User-ID Author Creation Date Start Date Deadline Expense Responsibe Category Type Status Justification Function Type SIL derived SIL manual SIL required Tests Technical Functions Software Other SW Hardware Signals Global variables Activation events Use-Cases User-Stories Refining Conflicting refined by conflicted by
SafetyRequirement_96 - Inter-task communication

µRTE easily can transmit events and data between tasks

 SafetyRequirement_96 Thomas Barth Wed Jun 08 17:46:14 CEST 2022 0.0 Thomas Barth product functional implemented System_Function QM derived QM

Software Layer

Data-Out Runnables (1)

Runnables in which signal button_edge is an output.

Unit Parent Function calls other Software Elements Technical Functions Requirements Type Tasks WCET Stack ROM Globals ProtectionSets SIL required SIL achieved sub Technical Functions sub Requirements) Has a return value SystemStates Ingoing Trigger Ports Outgoing Trigger Ports Ingoing Data Ports Outgoing Data Ports
run_readButton

Acquires the button state periodically and provides button signals

 Button
Runnable 0 0 0
SIL_1 QM false
  • Runnable_run_readButton_Tick
  • Runnable_run_readButton_Edge_OUT
  • run_readButton_HW_IN
  • Runnable_run_readButton_Button_OUT
  • Runnable_run_readButton_button_pressed_cnt

Data-In Runnables (1)

Runnables in which signal button_edge is an input.

Unit Parent Function calls other Software Elements Technical Functions Requirements Type Tasks WCET Stack ROM Globals ProtectionSets SIL required SIL achieved sub Technical Functions sub Requirements) Has a return value SystemStates Ingoing Trigger Ports Outgoing Trigger Ports Ingoing Data Ports Outgoing Data Ports
run_UART_wakeUp

Runnable to switch into the UART state if there is an event in the Blink State.
This runnable does not use hardware signals but accesses hardware directly and is therefore associated with
an protection set grandting access to hardware.

 UART
Runnable 0 0 0
SIL_1 QM
true
  • Runnable_run_UART_WakeUP

Input signals (1)

Signals that are input to runnables for which signal button_edge is an output.

Signal Type Storage Runnables OUT Runnables IN Tasks SystemStates Requirements miminum Age maximum Age Checksum Force Sync Inline ISR API effective inline SIL required SIL achieved Initial value (D) Pointer access (D) Datatype (D) Alt-In (D) Alt-Out (D) In-Driver (D) Out-Driver (D) OnData (D) OnError (D) OnTrigger (E)
HWI_Button

Hardware interface for the button

 Data local in
0 2 false false false false false - QM false false uRTE_boolean_t
ButtonRead
-

Tasks (2)

Tasks in which signal button_edge is used.

Task Core SIL Priority Software States Signals Init Hardware OutputSections Own TimeBase Stack
Button

Task responsible for reading the button state

 Arm® Cortex®-M4 SIL_1 6 - false .rtos.task.Button
UART

Task responsible for sending out UART protocolls

 Arm® Cortex®-M4 SIL_1 5 - false .rtos.task.UART

System-States (2)

SystemStates in which signal button_edge is used.

State isStart Runnables Tasks
Blink

In this state, an LED will blink.

 true
UART

A state that is entered if the user has pressed the button. Here, periodic UART messages are sent.

 false

Hardware Layer

Hardware Components (2)

Associated hardware for signal button_edge. Cores executing the associated runnables, memory used, peripherals interfaced.

Component Type Start End SIL required SIL achieved Sub-Components Technical Functions sub Technical Functions Requirements sub Requirements
Arm® Cortex®-M4

Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator) allowing 0-wait state execution from Flash memory, frequency up to 180 MHz, MPU, 225 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions

 Core - - - QM
main

The STM32F446RE RAM module

 RAM 0x20000000 0x2001ffff - QM