Implementation Details

Contents:

• Linux Processes vs NuttX Tasks
  • NuttX Build Types
  • Initialization of Global Variables
  • Global Variables and Multiple Task Copies
  • Memory Clean-Up
• Critical Sections
  • Types and Effects of Critical Sections
  • Single CPU Critical Sections
  • SMP Critical Sections
  • The Critical Section Monitor
  • IRQ Monitor and Worst Case Response Time
• Per-Thread Interrupt Controls
• Effects of Disabling Interrupts or Pre-Emption on Response Latency
  • Rate Monotonic Scheduling
• Bottom-Half Interrupt Handlers
  • RTOS Interrupts
  • Extending interrupt processing
  • High Priority Work Queue
  • Setting Up Bottom Half Interrupt Processing
• The NuttX Simulation
  • How the Simulator is Built
  • The nuttx.rel Blob
  • The $(HOSTOBJ) Blob
  • Accessing Host Devices Using FIFOs?
  • Toward a General Design
  • What is Wrong With That?
  • Simulated Interrupts
  • Supported Devices