Task Manager - Cross platform build support

In summary, task manager supports a wide range of hardware, including nearly every official Arduino board, most ESP boards, many mbed version 5 and 6 boards with or without an RTOS. We mainly test mbed with STM32 and nrf52 hardware.

What boards does TaskManagerIO support?

• For mbed we support both RTOS and BareMetal versions 5 and 6, and we test on several STM32 boards. Locking uses CAS to ensure proper cross core locking.
• For nrf52840 Arduino we rely on the fact that it uses CMSIS and access the underlying CAS locking.
• For ESP32 we use the underlying CAS capabilities to ensure cross core locking
• On ESP boards we call yield more often within the run loop to prevent watchdog resets.

Are there differences between platforms

We have tried as hard as we can to avoid any user-level differences in task manager between platforms. It should work close to identically on all platforms that we support.

How does platform determination work

Whenever you include TaskManagerIO.h this pulls in TaskPlatformDeps.h to work out what platform you’re building for, and to create suitable thread safety and CAS or Atomic based locking constructs for that platform. Again the thread safety is so that you can put events into task manager from any thread, or trigger events from interrupts. You should only ever call runLoop from a single thread, usually for the default taskManager instance that would be the loop() method on Arduino, or main() on mbed.