OS Components

NuttX is very feature-rich RTOS and is thus composed of various different subsystems. The following sections explain how each of these main RTOS components work and can be used. For detailed documentation on the specific API used in this case, you can head to the reference.

Contents:

• Binary Loader
  • Binary Loader Interface
  • Symbol Tables
  • Configuration Variables
• Concurrency
  • Related Subdirectories
• Device Drivers
  • Character Device Drivers
  • Block Device Drivers
  • Specialized Device Drivers
  • Thermal Framework
  • Lower-half and upper-half
  • Subdirectories of nuttx/drivers
  • Skeleton Files
  • Drivers Early Initialization
• NXFLAT
  • Overview
  • NXFLAT Toolchain
  • Appendix A: No GOT Operation
  • Appendix B: PIC Text Workaround
• NX Graphics Subsystem
  • Objectives
  • Organization
  • NX Header Files
• On-Demand Paging
  • Kernel Build Implementation
  • Legacy Implementation
• Audio Subsystem
  • Files in nuttx/audio
  • Related Header Files
  • Configuration Settings
  • Related Subdirectories
• NuttX File System
  • Virtual File System (VFS)
  • File systems
• NuttX libraries
  • libc
  • libdsp
  • libm
  • libxx
  • libnx
• Network Support
  • 6LoWPAN
  • SocketCAN
  • “Raw” packet socket support
  • IP Packet Filter
  • Network Address Translation (NAT)
  • Network Devices
  • Network Drivers
  • MDIO Bus Driver
  • CONFIG_NET_GUARDSIZE
  • Netlink Route support
  • SLIP
  • Work Queue Deadlocks
  • TCP Network Performance
  • Delayed ACK and TCP Performance
  • NuttX TCP State Machine Notes
• Memory Management
  • Shared Memory Support
  • Standard Memory Management Functions
  • Granule Allocator
  • Page Allocator
  • Shared Memory Management
  • I/O Buffers
• Syscall Layer
  • Header Files
  • Variadic Functions
  • Auto-Generated Files
  • Sub-Directories
  • mksyscall
• Host Tools
  • abi_check.py
  • bdf-convert.c
  • checkkconfig.py
  • checkpatch.sh
  • cmpconfig.c
  • configure.sh, configure.bat, configure.c, cfgparser.c, cfgparser.h
  • convert-comments.c
  • define.sh, define.bat
  • detab.c
  • discover.py
  • flash_writer.py
  • gencromfs.c
  • ide_exporter.py
  • incdir.sh, incdir.bat, incdir.c
  • indent.sh
  • initialconfig.c
  • kconfig.bat
  • kconfig2html.c
  • Libraries.mk, FlatLibs.mk, ProtectedLibs.mk, KernelLib.mk
  • link.[sh|bat], copydir.[sh|bat], unlink.[sh|bat]
  • lowhex.c
  • Makefile.host
  • Makefile.[unix|win]
  • mkconfig.c, cfgdefine.c, cfgdefine.h
  • mkconfigvars.sh
  • mkctags.sh
  • mkdeps.c, cnvwindeps.c, mkwindeps.sh, mknulldeps.sh
  • mkexport.sh, Export.mk
  • mkfsdata.pl
  • mkromfsimg.sh
  • mksymtab.c, cvsparser.c, cvsparser.h
  • mksyscall.c, cvsparser.c, cvsparser.h
  • mkversion.c, cfgdefine.c, cfgdefine.h
  • netusb.sh
  • nxstyle.c
  • nxtagspkgsfetch.sh
  • parsetrace.py
  • pic32mx
  • refresh.sh
  • rmcr.c
  • sethost.sh
  • showsize.sh
  • simbridge.sh
  • simhostroute.sh
  • testbuild.sh
  • uncrustify.cfg
  • zds
  • zipme.sh
  • mkpasswd — Build-time /etc/passwd Generation
• Architecture-Specific Code
  • Directory Structure in arch/
  • Summary of Files
  • Supported Architectures
• Boards Support
  • Board-Specific Configurations
  • boards/ Directory Structure
  • Summary of Files
  • Configuration Variables
  • Supported Boards
  • Configuring NuttX
  • Adding a New Board Configuration
  • Building Symbol Tables
• CMake Support
• OpenAMP Support
• Video Subsystem
• Crypto API Subsystem
  • Overview
  • Supported Algorithms
  • Usage
  • Asymmetric Cryptography
• Wireless Subsystem