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	2.1.0 / April 2016
Marketing target	Embedded devices
Platforms	ARM (ARM7, ARM9, Cortex-M3, Cortex-R4, Cortex-M4, Cortex-A), 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 Development Team based in China, after ten 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 micro controller 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]

• am335x
• am926
• amv6
• AT91SAM7S, AT91SAM7X
• Cortex: M0, M3, M4, R4, M7
• dm36x
• LPC214x, LPC24xx
• s3c24x0
• s3c44b0
• SEP4020
• Xilinx Zynq7000

AVR32

• UC3

Blackfin

• bf53x

IA32(X86)

M16C

• m16c62p

MIPS

• LOONGSON 1BC, 1C
• PIC32
• xburst

NIOS

• NIOS II

PPC

• ppc405

RX

unicore32

• sep6200

NEC V850

• 70f34

Xilinx

• MicroBlaze

See also

• Embedded system
• Microcontroller
• Single-board microcontroller

References

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

External links

• RT-Thread Official Homepage(Chinese)
• RT-Thread github homepage