TinyGo 4 — Cooperative soft-RT tasks

TinyGo elective 4 — Cooperative multi-task table

Elective · ~3h
Goal: Run ≥3 periodic tasks cooperatively; demonstrate starvation when one task hogs the CPU; write RT conclusions.

Theory

Model	Meaning
Cooperative	Task runs until yield; bad task starves others
Preemptive RTOS	Timer IRQ switches tasks
This lab	if now >= task.Next { run; next += period }

TinyGo here is not FreeRTOS. Learn limits honestly.

Lab

1. Task table: blink 500 ms, heartbeat UART 1 s, sensor 100 ms.
   
2. Idle Sleep(1ms) in outer loop.
   
3. Inject bad task with long Sleep; observe heartbeat jitter.
   
4. NOTES.md: when cooperative is enough vs interrupts/RTOS.

Full code: monorepo Go project 44.

Checkpoint

• ≥3 periods running
  
• Bad-task experiment documented
  
• NOTES.md with conclusions

Next elective

TinyGo 5 — I2C monitor (96-tinygo-05-…).