ni.com

Automating Real-Time Testing for

Embedded Software Development

Javier Gutierrez

Business Development Manager

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Agenda

•  What is embedded software development?

•  What is Real-Time testing?

•  Manual Real-Time testing

•  Automated Real-Time testing

•  Scripting Real-Time tests

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Embedded Software Development

Embedded software development is the process used to create the software for a computer system (embedded system) designed to perform one or a few dedicated functions. For example, an engine control unit (ECU)

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Control System

+ -

Plant Controller error setpoint

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Embedded Software Development Process

Requirements

Gathering

Model Simulation

Rapid Prototyping

Code Generation and ECU Flashing

Hardware in the Loop Testing

(HIL)

Physical Testing

• Test Cells

Field Test

• Calibration

+ -

Controller Plant

+ -

Plant Controller

Tests

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Real-Time Testing (RTT)

Test that provides deterministic stimulus for reliability and accurate simulation of an environment

•  RTT Types:

•  Model in the loop (MIL)

•  Rapid Control Prototyping (RCP)

•  Hardware in the Loop (HIL)

•  Functional Testing / Test Cells

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Test Continuity

Simulated Real Stimulus, Data Logging, User Interface, Analysis

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Embedded Software Development Process

Requirements

Gathering

Model Simulation

Rapid Prototyping

Code Generation and ECU Flashing

Hardware in the Loop Testing

(HIL)

Physical Testing

• Test Cells

Field Test

• Calibration

+ -

Controller Plant

+ -

Plant Controller

MIL Testing

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Model In the Loop (MIL) Manual Testing

Requirements

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Requirements

Environmental Conditions

•  REQ_CoastalSummer_Conditions

Modify the engine model parameters to reflect coastal summer conditions:

Ambient Temperature = 90 deg

Ambient Pressure = 14.5 psi

•  REQ_MountainWinter_Conditions

Modify the engine model parameters to reflect mountain winter conditions:

Ambient Temperature = 20 deg

Ambient Pressure = 10.5 psi.

Stimulus and Analysis •  REQ_FTP1000_SpeedProfile

Exercise the engine, controller and application model closed loop with the FTP1000 speed profile.

•  REQ_NumExceptions_215

Analyze the load torque response vs engine speed. Then compare test results to Mask A. Number of exceptions (points outside the mask) should be less than 215.

The test system will be used to validate an engine controller model with different environmental parameter values.

Requirements

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Model In the Loop (MIL) Manual Testing

Requirements Models

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Engine Model Requirement

s Models

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Model In the Loop (MIL) Manual Testing

Requirements Models Stimulus Profile

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Engine FTP1000 Speed Profile

Time (s)

Engin

e Spe

ed (R

PM)

Requirements

Models Stimulus Profile

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Model In the Loop (MIL) Manual Testing

Requirements Models Stimulus Profile Analysis

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Speed/Torque Mask A Analysis Requirements Models Stimulus Profile Analysis

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Model In the Loop (MIL) Manual Testing

Requirements Models Stimulus Profile Analysis

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Application Software

NI Requirements Gateway •  Requirements traceability •  Impact analysis •  Coverage reporting

NI DIAdem •  Data management •  Data visualization •  Data Analysis and reporting

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Application Software

NI TestStand •  Test automation •  Production test optimization •  Batch test data collection and reporting

NI VeriStand •  Real-Time control, stimulus, and data logging •  Simulation automation and visualization •  Control algorithm prototyping

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Manual Testing Demo

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Model In the Loop (MIL) Automated Testing

Requirements Models Stimulus Profile Analysis

Stimulus Profile Analysis

Stimulus Profile Analysis

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Automation

Requirements

Models Stimulus Profiles Analysis

Model In the Loop (MIL) Automated Testing

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Automation Requirement

s Models Stimulus Profiles Analysis

Model In the Loop (MIL) Automated Testing

Workspace

Models

Stimulus Profile

Export Channels

Import Channels

Run Script

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Automation Sequence

Requirements

Model In the Loop (MIL) Automated Testing

Open VeriStand (VS)

Open VeriStand Config File

Set Model Parameters

Run Stimulus Profile

Open DIAdem

Export Log

Run Analysis Script

Close DIAdem

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Automated Demo

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Model In the Loop (MIL) Scripting Real-Time Tests

•  Abstract the complexity of the test sequence creation •  Define the test procedure

•  Provide a single tool that abstract other tools

•  Talk the same language as the user

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Model In the Loop (MIL) Scripting Real-Time Tests

Automated Test Sequence Scripting Test •  Use the NIGEL engine, controller

and application model DLLs as the models to validate

•  Use the CalibFile_CoastalSummer.csv as model parameters file

•  Use the engine 1000.et1 as the stimulus profile

•  Use the NIGEL_MaskA_Analysis.VBS as the analysis script and reporting

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Model In the Loop (MIL) Scripting Real-Time Tests

Scripting

Automation

Requirements Models Stimulus

Profiles Analysis

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MIL Scripting Demo

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Embedded Software Development Process

Requirements

Gathering

Model Simulation

Rapid Prototyping

Code Generation and ECU Flashing

Hardware in the Loop Testing

(HIL)

Physical Testing

• Test Cells

Field Test

• Calibration

+ -

Controller Plant

+ -

Plant Controller

MIL Testing

HIL Testing

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HIL Scripting Demo

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Questions?

javier.gutierrez@ni.com