PHiLIP on the HiL: Automated Multi-Platform OS Testing With External Reference Devices

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