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Comparing ISR Handling in FreeRTOS, ChibiOS, and CooCox CoOS for ARM Cortex-M Projects?

Hey guys, I’m evaluating open-source RTOS options for an ARM Cortex-M project. While FreeRTOS, ChibiOS, and CooCox CoOS seem to offer similar features, I’m curious about real-world experiences.

Specifically, how do these RTOS handle ISR interactions e.g., ChibiOS’s “`chSysLockFromIsr“` vs. CooCox CoOS’s preemptable service request queue?

Any insights on these or other open-source RTOS options for ARM Cortex-M would be greatly appreciated!

@Middleware & OS

  1. electro_coco#0000

    FreeRtos has interrupt safe apis which check for whether premeption is aasked or not

  2. josephogbonna#0

    Here’s a brief summary:

    – FreeRTOS: Uses software timers and a widely-used API, with a large community.
    – ChibiOS: Offers a lightweight, flexible approach with hybrid scheduling.
    – CooCox CoOS: Provides a simple API and low power consumption.
    – Zephyr RTOS: Features a modern, modular architecture with efficient resource usage.
    – Apache Mynewt OS: Offers a modular, extensible design with a small footprint.

    Consider your project’s specific needs when choosing an RTOS.

  3. josephogbonna#0

    But I will say you go for FreeRTOS or Zephyr RTOS

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