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- Task Scheduler – cooperative multitasking for Arduino microcontrollers
- Version 1.8.1: 2015-10-22
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- OVERVIEW:
- A lightweight implementation of cooperative multitasking (task scheduling) supporting:
- 1. Periodic task execution (with dynamic execution period in milliseconds)
- 2. Number of iterations (n times)
- 3. Execution of tasks in predefined sequence
- 4. Dynamic change of task execution parameters (frequency, number of iterations, callback function)
- 5. Power saving via entering IDLE sleep mode between tasks are scheduled to run
- 6. Support for task invocation via Status Request object
- 7. Support for task IDs and Control Points for error handling and watchdog timer
- Changelog:
- v1.0.0:
- 2015-02-24 - Initial release
- 2015-02-28 - added delay() and disableOnLastIteration() functions
- 2015-03-25 - changed scheduler execute() function for a more precise delay calculation:
- 1. Do not delay if any of the tasks ran (making request for immediate execution redundant)
- 2. Delay is invoked only if none of the tasks ran
- 3. Delay is based on the min anticipated wait until next task _AND_ the runtime of execute function itself.
- 2015-05-11 - added restart() and restartDelayed() functions to restart tasks which are on hold after running all iterations
- 2015-05-19 - completely removed delay from the scheduler since there are no power saving there. using 1 ms sleep instead
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- v1.4.1:
- 2015-09-15 - more careful placement of AVR-specific includes for sleep functions (compatibility with DUE)
- sleep on idle run is no longer a default and should be explicitly compiled with _TASK_SLEEP_ON_IDLE_RUN defined
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- v1.5.0:
- 2015-09-20 - access to currently executing task (for callback functions)
- 2015-09-20 - pass scheduler as a parameter to the task constructor to append the task to the end of the chain
- 2015-09-20 - option to create a task already enabled
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- v1.5.1:
- 2015-09-21 - bug fix: incorrect handling of active tasks via set() and setIterations().
- Thanks to Hannes Morgenstern for catching this one
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- v1.6.0:
- 2015-09-22 - revert back to having all tasks disable on last iteration.
- 2015-09-22 - deprecated disableOnLastIteration method as a result
- 2015-10-01 - made version numbers semver compliant (documentation only)
- v1.7.0:
- 2015-10-08 - introduced callback run counter - callback functions can branch on the iteration number.
- 2015-10-11 - enableIfNot() - enable a task only if it is not already enabled. Returns true if was already enabled, false if was disabled.
- 2015-10-11 - disable() returns previous enable state (true if was enabled, false if was already disabled)
- 2015-10-11 - introduced callback functions "on enable" and "on disable". On enable runs every time enable is called, on disable runs only if task was enabled
- 2015-10-12 - new Task method: forceNextIteration() - makes next iteration happen immediately during the next pass regardless how much time is left
- v1.8.0:
- 2015-10-13 - support for status request objects allowing tasks waiting on requests
- 2015-10-13 - moved to a single header file to allow compilation control via #defines from the main sketch
- v1.8.1:
- 2015-10-22 - implement Task id and control points to support identification of failure points for watchdog timer logging
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