Open Source Summit India 2025

This talk would highlight the importance of open source health devices and how we used Zephyr across several hardware platforms to develop these devices. We will draw on experiences from our projects including HealthyPi 5, HealthyPi 6 and the wearable HealthyPi Move, all open source hardware and software. More specifically how Zephyr enabled the use of practically a single codebase across three different microcontroller platforms in different form factors.

This session will be about my current and ongoing experience at Texas Instruments where I have been working on enabling Zephyr for AM243x platform, a multiprocessor heterogeneous evaluation module with both Cortex-R and Cortex-M cores and all the challenges I have faced in the process. This includes adding board support, device trees, device drivers, as well as testing the peripherals to ensure proper function on Zephyr. I will also be walking through the process of writing a device driver and the device driver model for Zephyr, and my experience and the challenges I encountered in doing so. The talk will also include the gaps and challenges involved in booting a heterogeneous SoC, the limitations I faced with MCUBoot as a bootloader for Zephyr, the potential alternatives, and the solution involving TI's RTOS bootloader. The aforementioned topics may serve as a reference guide for enabling more heterogeneous SoCs in the future.

Twister, as Zephyr RTOS’s test runner, operates by automating the testing pipeline—discovering test cases, building them for target platforms, executing them on hardware or simulators, and reporting results. In this presentation will talk about how twister works like test case identification, configuration and build executing on hardware and how results are being collected