+Requirement Model
- +Blinking LED
- +UART
+Logical Function Model
- Controller
- LED
- PC
- Button
- Blinking LED
- UART
+Software Model
- +Software
  - +Button
    - ButtonRead
    - +run_readButton
      - press_cnt
  - +LED
    - drv_LED
    - run_LED
  - +UART
- +RTE
  - +Activation Engine
    - Button Timebase
    - LED timebase
  - +Signal Layer
    - HWI LED
    - HWI_Button
    - button state
    - button_edge
    - button_cnt
    - HWO_UART
    - +Signal-Pools
      - Button
  - +System States
    - Blink
    - UART
    - +State-Handler
- +RTOS
  - Button
  - LED
  - UART
- +Linkage
  - +Output-Sections
  - +Protection-Sets
    - BaseProtection
    - UART
- +DataTypes
+Hardware Model
- +Nucelo-F446RE
  - +STM32F446RE
    - Arm® Cortex®-M4
    - main
    - +GPIO
      - PA5
      - PC13-TAMPER-RTC
    - USART
  - Button
  - LED
+Testing Model
- +Item Tests
  - (Test_128) Smoke-Test
- +Functional Tests
  - +Blinking LED
    - (Test_132) Regular blink
    - (Test_133) LED permanent ON
  - +UART
    - (Test_134) UART functional/system test

OutDriver

drv_LED

Hardware write-Interface towards the LED

Warnings

Safety (1)

Safety Warnings for OutDriver drv_LED.
Safety warnings are related to the Requirements Layer, especially the SIL

drv_LED has a SIL required of SIL_1 but a SIL achieved of QM

Diagrams

Relationships

Requirements Model

Logical Function Model

Software Model

Hardware Model

Safety

Required
The highest SIL derived from SafetyRequirements,Technical Functions and calling Runnables. SIL derived	SIL_1
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	SIL_1
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

Name

drv_LED

Type

OutDriver

Description

Hardware write-Interface towards the LED

User-ID

OutDriver_19

UID

_YB_lAOTWEeyrV5NXTwe27Q

software unit configuration

Parent

LED

WCET

Stack

ROM

driver configuration

DataType

uRTE_boolean_t

Is Synchronous

true

Hardware Components (1)

Hardware the driver communicates with.

Component	Type	Start	End	SIL required	SIL achieved	Sub-Components	Technical Functions	sub Technical Functions	Requirements	sub Requirements
PA5 LD2 [Green Led] on the Nucelo Board	Periphery	GPIOA_BASE	GPIOB_BASE - 1	SIL_1	QM		Blinking LED

Requirement Layer

(Safety)Requirements (1)

(Safety)Requirements referencing to OutDriver drv_LED.

(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_110 - Hardware Interfacing How to read and write data form and to hardware.	UART	SafetyRequirement_110	Thomas Barth	Thu Jun 09 20:50:22 CEST 2022			0.0	Thomas Barth	product	functional	approved		System_Function	QM	derived	QM			ButtonRead drv_LED								SafetyRequirement_111 - SignalLayer features Requirement_95 - UART

Functional Layer

Technical Functions (1)

Technical functions referencing to OutDriver drv_LED.

Function	LFB	Software	Hardware	Other Software	SIL required	SIL achieved	SIL justification	sub Technical Functions	Requirements	sub Requirements
Blinking LED An LED shall blink to indicate that the system is alive and responding.	Button Controller LED	run_LED drv_LED run_readButton ButtonRead	PA5		SIL_1	QM		Blinking LED UART	Requirement_32 - LED Blink Requirement_93 - LED Button SafetyRequirement_95 - Runnable activation by cyclic events Requirement_95 - UART	Requirement_32 - LED Blink Requirement_93 - LED Button SafetyRequirement_110 - Hardware Interfacing SafetyRequirement_111 - SignalLayer features Requirement_95 - UART SafetyRequirement_94 - Global variables Requirement_95 - UART

Software Layer

Data-Signals (1)

DataSignals directly using OutDriver drv_LED.

Signal	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)
HWI LED Hardware interface for the LED	local in .rtos.task.LED	run_LED		LED	Blink UART		0	0	false	false	false	false	false	-	QM	0	false	uRTE_boolean_t			-	drv_LED

Data-Signals (2)

DataSignals which are in the source chain of OutDriver drv_LED.

Signal	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)
button state A representation of the current button state	local in .rtos.task.Button .rtos.task.LED .rtos.task.UART	run_readButton	run_LED run_UART_send	Button LED UART	Blink UART	SafetyRequirement_93 - Runnable activation by signal events Requirement_95 - UART SafetyRequirement_95 - Runnable activation by cyclic events Requirement_95 - UART SafetyRequirement_96 - Inter-task communication SafetyRequirement_97 - local and global signals Requirement_95 - UART SafetyRequirement_111 - SignalLayer features Requirement_95 - UART SafetyRequirement_97 - local and global signals Requirement_95 - UART	0	105	false	false	false	false	false	SIL_1	QM	false	false	uRTE_boolean_t			-		Runnable_run_UART_send_TPortIN_1 in run_UART_send
HWI_Button Hardware interface for the button	local in .rtos.task.Button		run_readButton	Button	Blink UART		0	2	false	false	false	false	false	-	QM	false	false	uRTE_boolean_t			ButtonRead

Runnables (1)

Runnables which directly use Out-signals with which OutDriver drv_LED is associated

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_LED Controls the LED signal and thus the LED	LED			Blinking LED	Requirement_32 - LED Blink Requirement_93 - LED Button	Runnable	LED	0	0	0			SIL_1	QM	Blinking LED	SafetyRequirement_110 - Hardware Interfacing SafetyRequirement_111 - SignalLayer features Requirement_95 - UART	false	Blink UART	Runnable_00_blink_Tick		Runnable_blink_Button_IN	Runnable_00_blink_OUT

Runnables (2)

Runnables which are in the source chain of OutDriver drv_LED.

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_LED Controls the LED signal and thus the LED	LED			Blinking LED	Requirement_32 - LED Blink Requirement_93 - LED Button	Runnable	LED	0	0	0			SIL_1	QM	Blinking LED	SafetyRequirement_110 - Hardware Interfacing SafetyRequirement_111 - SignalLayer features Requirement_95 - UART	false	Blink UART	Runnable_00_blink_Tick		Runnable_blink_Button_IN	Runnable_00_blink_OUT
run_readButton Acquires the button state periodically and provides button signals	Button			Blinking LED UART	SafetyRequirement_94 - Global variables Requirement_95 - UART	Runnable	Button	0	0	0	press_cnt		SIL_1	QM	Blinking LED UART	SafetyRequirement_110 - Hardware Interfacing SafetyRequirement_111 - SignalLayer features Requirement_95 - UART	false	Blink UART	Runnable_run_readButton_Tick	Runnable_run_readButton_Edge_OUT	run_readButton_HW_IN	Runnable_run_readButton_Button_OUT Runnable_run_readButton_button_pressed_cnt

Hardware Layer

Hardware Components (2)

Hardware OutDriver drv_LED is associated with. Including executing CPUs, hardware referenced by its protectionSets and its direct hardware references.

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
PA5 LD2 [Green Led] on the Nucelo Board	Periphery	GPIOA_BASE	GPIOB_BASE - 1	SIL_1	QM		Blinking LED