Getting Strange New Displays and Sensors Running on Zephyr for Open Health Devi...
summary
Open-source patient monitors and a smartwatch run a single codebase across RP2040, nRF5340 and STM32+ESP32 hardware using Zephyr; dozens of custom drivers were written (about ten sensor drivers and several display drivers like SH8601 and IL9881). Data pipeline uses Zbus events and RTIO, with earlier sampling at 128/256 Hz moved to 2,000 samples per second per channel on the M4, and issues encountered include nRF53 XIP keeping flash alive and blocking I2C/SPI RTIO calls.
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chapters (16)
- 0:00Open health devices and Proto Central
- 3:22Open source hardware in medical devices
- 7:10Health devices and Zephyr's role
- 11:06Nordic's Zephyr adoption
- 12:50Scaling health devices with Zephyr
- 15:46Multi-threaded sensor data in Zephyr
- 17:12Nordic nRF5340 challenges
- 19:00Multi-core systems in Zephyr
- 20:27Display interfaces and complexities
- 23:20Display drivers for Zephyr
- 25:29MIPI DSI and video mode displays
- 27:35Displays with LVGL in Zephyr
- 30:06Out-of-tree sensor drivers in Zephyr
- 31:56Asynchronous sensor data with RTIO
- 33:45Lessons from Zephyr drivers
- 34:49Conclusion and future
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