Software Engineering for Embedded Systems, 2nd Edition

6

Operating Systems

Jean J. Labrosse    Founder and Chief Architect, Micrium LLC, Weston, FL, United States

Abstract

Real-time systems are systems in which correctness and timeliness of computed values are at the forefront; there are two types—hard and soft real-time systems.

Keywords

Ethernet; Fragmentation; Kernels; Preemptive; Stack size; Task

Chapter Outline

• 1 Foreground/Background Systems    
• 2 Real-Time Kernels    
• 3 RTOS (Real-Time Operating System)    
  • 3.1 Critical Sections    
  • 3.2 Task Management    
• 4 Assigning Task Priorities    
• 5 Determining the Size of a Stack    
  • 5.1 The Idle Task    
  • 5.2 Priority Levels    
  • 5.3 The Ready List    
• 6 Preemptive Scheduling    
• 7 Scheduling Points    
• 8 Round-Robin Scheduling    
• 9 Context Switching    
• 10 Interrupt Management ...