Missing a deadline is undesirable but not catastrophic; the data still has value (e.g., video streaming, digital cameras). Task Scheduling and Priority
The system boots from the entry point (reset vector) and begins execution. Conclusion
Efficient design relies on a Real-Time Operating System (RTOS) to manage tasks. Missing a deadline is undesirable but not catastrophic;
A fail-safe mechanism where the software must "kick the dog" (reset a timer) at regular intervals. If the software freezes due to a bug or EMI, the timer expires and forces a hardware reset. 3. Developing and "Installing" the System
Modern RTES utilize a layered approach to decouple hardware from software: A fail-safe mechanism where the software must "kick
Code that talks to the silicon. Middleware/RTOS: Managing concurrency and memory. Application Layer: The specific business logic. Memory Management
Unlike general-purpose computing (like a PC), where the goal is high average throughput, RTES prioritizes . A deterministic system guarantees a specific response time (latency) for every event, regardless of the system load. Hard vs. Soft Real-Time Developing and "Installing" the System Modern RTES utilize
Dynamic memory allocation ( malloc/free ) is generally discouraged in hard real-time systems because it is non-deterministic and can lead to memory fragmentation. Instead, engineers use or Memory Pools of fixed-size blocks. The Watchdog Timer (WDT)
Real-Time Embedded Systems: Design Principles and Engineering Practices
Use a programmer utility to write the binary to the microcontroller's non-volatile flash memory.