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Oct 08, 2021 - Oct 15, 2021

Internet Technologies group will present a paper about "PHiLIP on the HiL: Automated Multi-platform OS Testing with External Reference Devices" at ACM SIGBED International Conference on Embedded Software (EMSOFT), which is part of the Embedded Systems Week (ESWEEK). Since 2001, EMSOFT has been the premier venue for cutting-edge research in the design and analysis of software that interacts with physical processes, with a long-standing tradition for results on cyber-physical systems, which compose computation, networking, and physical dynamics.

  • Kevin Weiss, Michel Rottleuthner, Thomas C. Schmidt, Matthias Wählisch,
    PHiLIP on the HiL: Automated Multi-platform OS Testing with External Reference Devices,
    ACM Transactions on Embedded Computing Systems, ACM, 2021. accepted for publication
     PDF Website BibTeX Abstract

The paper will be published as fast-track in ACM Transactions on Embedded Computing Systems (TECS).


Developing an operating system ( OS ) for low-end embedded devices requires continuous adaptation to new hardware architectures and components, while serviceability of features needs to be assured for each individual platform under tight resource constraints. It is challenging to design a versatile and accurate heterogeneous test environment that is agile enough to cover a continuous evolution of the code base and platforms. This mission is even more challenging when organized in an agile open-source community process with many contributors such as for the RIOT OS. Hardware in the Loop (HiL) testing and Continuous Integration (CI) are automatable approaches to verify functionality, prevent regressions, and improve the overall quality at development speed in large community projects. In this paper, we present PHiLIP (Primitive Hardware in the Loop Integration Product), an open-source external reference device together with tools that validate the system software while it controls hardware and interprets physical signals. Instead of focusing on a specific test setting, PHiLIP takes the approach of a tool-assisted agile HiL test process, designed for continuous evolution and deployment cycles. We explain its design, describe how it supports HiL tests, evaluate performance metrics, and report on practical experiences of employing PHiLIP in an automated CI test infrastructure. Our initial deployment comprises 22 unique platforms, each of which executes 98 peripheral tests every night. PHiLIP allows for easy extension of low-cost, adaptive testing infrastructures but serves testing techniques and tools to a much wider range of applications.

Time & Location

Oct 08, 2021 - Oct 15, 2021