Scheduling

This package supports a common interface for running tasks and background threads. This support is included with kasl/scheduling.h; three functions are provided:

• void kasl::scheduleThread adds a thread to be scheduled. This should be called before startScheduler.
• void kasl::startScheduler initialises the scheduler.
• void kasl::runScheduler runs an interation of the scheduler. This should be placed in the main loop.

Platform specific notes

• Atmel SAMD boards (src/scheduling_atmelsamd.cc):
  • startScheduler and runScheduler are nops provided to keep a common interface for code that needs to run on multiple architectures.
  • The standard Arduino Scheduler is used.
  • There isn’t a hard limit on the number of threads that can be run.
• Other boards (src/scheduling_default.cc):
  • There is a limit to the number of tasks that can be scheduled; this is controlled by the MAX_TASKS define, with a default of 8. This can be tuned to save memory, e.g. on the AVR boards.
  • Threads are scheduled to run every SCHEDULER_FREQUENCY milliseconds; the default is 50.
  • These settings can be changed under build_flags in the environment. See examples/schedutest for an example.