ADCS.flight_software.tasks.task module

class ADCS.flight_software.tasks.task.Task(name, callback, rate_hz, wcet, priority, enabled=True)[source]

Bases: object

Periodic task definition for a time-triggered single-core scheduler.

This class models a cooperative, non-preemptive, periodic task intended to be executed by a time-triggered scheduler such as TTC_Single_Core.

Each task is characterized by:

  • A fixed execution period \(T\)

  • A fixed worst-case execution time (WCET) \(C\)

  • A static priority

  • A callback function representing the task body

The execution period is derived from the configured rate:

\[T = \frac{1}{f}\]

where \(f\) is the task rate in Hertz.

Scheduling and execution assumptions:

  • Tasks are non-preemptive

  • If a task executes, it consumes exactly its WCET

  • If insufficient CPU budget exists, the task is skipped

  • WCET overruns are not modeled at this level

  • Task releases are consumed only upon execution

This abstraction is designed for:

  • Deterministic schedulability analysis

  • TTC (Time-Triggered Cooperative) flight software

  • Offline simulation and testing

Parameters:

  • name (str)

  • callback (Callable)

  • rate_hz (float)

  • wcet (float)

  • priority (int)

  • enabled (bool)