RT-Thread

RT-Thread

Developer	Bernard Xiong & RT-Thread Team
OS family	Real-time operating systems
Working state	Current
Source model	Open source
Latest release	1.1.1 / June 2013
Marketing target	Embedded devices
Platforms	ARM (ARM7, ARM9, Cortex-M3, Cortex-R4, Cortex-M4), AVR32, x86, M16C, NIOS, MIPS
Kernel type	Single Kernel
License	GPLv2
Official website	www.rt-thread.org

RT-Thread^[1][2] is an open source real-time operating system for embedded devices. It is distributed under the GPLv2 licence. RT-Thread is developed by the RT-Thread Studio based in China, after five years' fully concentrated development. It is aimed to change the current situation in China that there is no well used open source real-time operating system in the microcontroller area.

RT-Thread kernel

• Object oriented real-time core (while remaining the elegant and flexible style of C Programming Language);
• 8, 32 or 256 priority scheduling multi-thread scheduling; Using the round-robin policy ensures that all threads having the same priority level will be scheduled equally;
• Synchronization of threads: semaphore and mutual exclusion semaphore (mutex) to prevent priority inversion;
• Complete and efficient support for communication between threads, including mailbox, message queues, event flag;
• Static memory management supports thread suspend/resume when it allocates/frees a memory block and thread-safe dynamic heap management;
• A device driver framework to provide standard interface to high level application;

FinSH shell

• Command line that accepts C-like expression;
• Access system core functions directly via command line like C Programming Language grammar;
• Access system global variables directly via command line like C Programming Language grammar;
• Command history records and automatic complete for the Command Prompt;

Device File System

• Virtual File System optimised for small device
• POSIX style API;
• Support the different implementation of file systems
• Wrapper for ELM Chan's FatFs filesystem.

TCP/IP protocol stack

LwIP is a lightweight TCP/IP protocol stack with the following capabilities.

• Standard BSD Socket interface.
• IP, ICMP, UDP, TCP supported.
• DNS, DHCP, PPP supported.
• TFTP, HTTP, FTP supported (refer to the netutil component).

RT-Thread/GUI

• Integrated with RT-Thread;
• Multi-Thread supported;
• Multi-Window supported;
• Rich Widgets such as: label, button, checkbox, radiobox, etc.
• Client/Server Architecture hai;
• Client: Workbench/View/Window Architecture;
• Chinese GB2312 display.

CPU architectures

The following CPU architectures are supported:
ARM^[3]

• AT91SAM7S, AT91SAM7X
• AT91SAM926x
• FM3
• LM3S
• LPC1100, LPC122x, LPC17xx
• LPC214x, LPC24xx
• NUC1xx
• PK40X25
• S3C24x0
• S3C44B0
• SEP4020
• STM F1, F2, F4
• AM335X
• RM48X50

AVR32

• AVR32UC3

IA32(X86)

M16C

MIPS

• JZ47xx
• LOONGSON
• LOONGSON 1B

PIC32

NIOS

• NIOS II

NEC

• NEC V850

See also

• Embedded system
• Microcontroller
• Single-board microcontroller

References

1. "RT-Thread 启动下一代RTOS演化".
2. "RT-Thread English".
3. "RT-Thread.org- Connected Community - ARM".

External links

• RT-Thread Official Homepage(Chinese)
• RT-Thread Official Homepage(English)
• RT-Thread Documentation
• RT-Thread Source Code on code.google.com