uRTEDemo_03_Nucleo-F446RE_SystemStates_10_Model

Runnable

run_readButton

Acquires the button state periodically and provides button signals

Warnings

Safety (1)

Safety Warnings for Runnable run_readButton.
Safety warnings are related to the Requirements Layer, especially the SIL

Multiple Technical functions for run_readButton: Blinking LED, UART

Diagrams

Requirements Model
Logical Function Model
Software Model
Hardware Model

Safety

Required
SIL derived QM
overwrite (SIL_manual) derived
reason (SIL_manual_reason)
SIL QM
Achieved
SIL achieved QM
justification

Properties

Base
Namerun_readButton
Type Runnable
Description

Acquires the button state periodically and provides button signals
User-IDRunnable_36
UID_QXUQ0OZhEeyZ2OzYlvU4PA
software unit configuration
Parent Button
WCET 0
Stack 0
ROM 0

Global Variables (1)

global variables for this function

Global Variable Container DataType Requirements public (S) InitValue Storage Protection Set (S) SIL req SIL ach
press_cnt

internal counter for button press duration

 run_readButton uRTE_uint16_t - 0 .button - QM QM
runnable configuration
Has a return value false

System-States (2)

Systemstates the runnable is active in.

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
Ports

Ingoing Trigger Ports (1)

Trigger IN ports attached runnable run_readButton.

Port Events Signal event source Container Task Guard Order
Runnable_run_readButton_Tick
run_readButton Button
0

Outgoing Trigger Ports (1)

Trigger OUT ports attached to runnable run_readButton.

Port Signal event target Container
Runnable_run_readButton_Edge_OUT run_readButton

Ingoing Data Ports (1)

Data IN ports attached to runnable run_readButton.

Port Signals Source Container
run_readButton_HW_IN run_readButton

Outgoing Data Ports (2)

Data OUT ports attached to runnable run_readButton.

Port Signals Target Container
Runnable_run_readButton_Button_OUT run_readButton
Runnable_run_readButton_button_pressed_cnt run_readButton

Requirement Layer

(Safety)Requirements (1)

(Safety)Requirements referencing to runnable run_readButton.

(Safety)Requirement Parent User-ID Author Creation Date Start Date Deadline Expense Responsibe Category Type Status Function Type SIL derived SIL manual SIL effective Tests Technical Functions Software Hardware Signals Global variables Activation events Use-Cases User-Stories Refining Conflicting refined by conflicted by
(SafetyRequirement_94) Global variables

Global variables can store data for Runnables and other Software Functions.
The memory protection will automatically be generated.
The actual declaration is implemented as user-code to allow the use of non-trivial datatypes and operations.

 SafetyRequirement_94 Thomas Barth Wed Jun 08 17:34:15 CEST 2022 0.0 Thomas Barth product functional implemented System_Function QM derived QM

(Safety)Requirements to guards and drivers (1)

(Safety)Requirements referencing to guards, functions and drivers

(Safety)Requirement Parent User-ID Author Creation Date Start Date Deadline Expense Responsibe Category Type Status Function Type SIL derived SIL manual SIL effective Tests Technical Functions Software Hardware Signals Global variables Activation events Use-Cases User-Stories Refining Conflicting refined by conflicted by
(SafetyRequirement_110) Hardware Interfacing

How to read and write data form and to hardware.

 SafetyRequirement_110 Thomas Barth Thu Jun 09 20:50:22 CEST 2022 0.0 Thomas Barth product functional approved System_Function QM derived QM

Functional Layer

Technical Functions (2)

Technical functions referencing to runnable run_readButton.

Function LFB Software Hardware Technical Functions sub Technical Functions Requirements sub Requirements
Blinking LED

An LED shall blink to indicate that the system is alive and responding.
UART

If the button is pressed, UART messages indicating the press duration are sent.

Technical functions to guards and drivers (2)

Technical functions referencing to guards, functions and drivers of runnable run_readButton.

Function LFB Software Hardware Technical Functions sub Technical Functions Requirements sub Requirements
Blinking LED

An LED shall blink to indicate that the system is alive and responding.
UART

If the button is pressed, UART messages indicating the press duration are sent.

Software Layer

IN Signals (1)

Ingoing signals of runnable run_readButton.

Signal Type Storage Runnables OUT Runnables IN Tasks SystemStates Requirements miminum Age maximum Age Checksum Force Sync Inline ISR API effective inline SIL req SIL ach 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
-

OUT Signals (3)

Outgoing signals of runnable run_readButton.

Signal Type Storage Runnables OUT Runnables IN Tasks SystemStates Requirements miminum Age maximum Age Checksum Force Sync Inline ISR API effective inline SIL req SIL ach 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)
button state

A representation of the current button state

 Data local in
0 105 false false false false false SIL_1 QM false false uRTE_boolean_t
-
-
button_cnt

contains the number of seconds, the button has been pressed

 Data global in
Button		 0 202 true false false false false QM QM 0 false button_cnt_t
-
-
button_edge

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

 Event local in
0 0 false false false false false QM QM - - - - - - - - -

Software units (1)

Software units which are associated with runnable run_readButton.

Unit Parent Function calls Technical Functions Requirements Type Tasks WCET Stack ROM Globals ProtectionSets SIL req SIL ach sub Technical Functions (R) sub Requirements (R) Has a return value (R) SystemStates (R) Ingoing Trigger Ports (R) Outgoing Trigger Ports (R) Ingoing Data Ports (R) Outgoing Data Ports (R) Signals (D) Runnables (D) DataType (D) Is Synchronous (D) Hardware (D) Ports (G) Callers (F) Return Type (F) Parameters (F)
ButtonRead

Reads the current button state from hardware

 Button
InDriver 0 0 0
QM QM - - - - - - - - uRTE_boolean_t true - - - -

Tasks (1)

Tasks runnable run_readButton is executed by.

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

DataTypes (3)

Datatypes runnable run_readButton is associated with.

Type Atomic Primitive Initial value Typedef path Signals Drivers Global Variables
button_cnt_t

Saves the number of ticks an button has been pressed

 false false 0 generated at src_rte\signals\types\button_cnt_t_type.h
uRTE_boolean_t

This type used by uRTE internally and is avaiable for general purpose. Its save to delete this type if it is not needed.

 true true 0 generated at src_rte\signals\types\uRTE_boolean_t_type.h
uRTE_uint16_t

This type used by uRTE internally and is avaiable for general purpose. Its save to delete this type if it is not needed.

 true true 0 generated at src_rte\signals\types\uRTE_uint16_t_type.h

Activation-Events (1)

Activation Events triggering the execution of runnable run_readButton.

Event Type Cycle Time (C) Offset (C) Task-Init (S) Requirements Ports Runnables Tasks SystemStates SIL req SIL ach
Button Timebase

Timebase for button read operations

 CyclicEvent 200 0 - SIL_1 QM

Runnables triggered (2)

Runnables triggered by runnable run_readButton.

Unit Parent Function calls Technical Functions Requirements Type Tasks WCET Stack ROM Globals ProtectionSets SIL req SIL ach sub Technical Functions sub Requirements) Has a return value SystemStates Ingoing Trigger Ports Outgoing Trigger Ports Ingoing Data Ports Outgoing Data Ports
run_UART_send

Sends UART messages periodically via the UART signal

 UART
Runnable 0 0 0
QM QM
true
  • Runnable_run_UART_send_TPortIN_1
  • Runnable_run_UART_send_DPortIN_1
  • Runnable_run_UART_send_DPortIN_2
  • Runnable_run_UART_send_UART_OUT
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
QM QM
true
  • Runnable_run_UART_WakeUP

Runnables receiving data (2)

Runnables receiving data from runnable run_readButton.

Unit Parent Function calls Technical Functions Requirements Type Tasks WCET Stack ROM Globals ProtectionSets SIL req SIL ach sub Technical Functions sub Requirements) Has a return value SystemStates Ingoing Trigger Ports Outgoing Trigger Ports Ingoing Data Ports Outgoing Data Ports
run_LED

Controls the LED signal and thus the LED

 LED
Runnable 0 0 0
- QM false
  • Runnable_00_blink_Tick
  • Runnable_blink_Button_IN
  • Runnable_00_blink_OUT
run_UART_send

Sends UART messages periodically via the UART signal

 UART
Runnable 0 0 0
QM QM
true
  • Runnable_run_UART_send_TPortIN_1
  • Runnable_run_UART_send_DPortIN_1
  • Runnable_run_UART_send_DPortIN_2
  • Runnable_run_UART_send_UART_OUT

Hardware Layer

Hardware Components (2)

Hardware runnable run_readButton is associated with. Including executing CPUs, hardware referenced by its protectionSets and driver hardware of connecting signals.

Component Type Start End SIL req SIL ach 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
PC13-TAMPER-RTC

B1 [Blue PushButton] on the Nucleo Board

 Periphery GPIOC_BASE GPIOD_BASE - 1 - QM