85 lines
4.4 KiB
Markdown
85 lines
4.4 KiB
Markdown
# RT-Thread #
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[中文页](README_zh.md) |
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[](https://github.com/RT-Thread/rt-thread/blob/master/LICENSE)
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[](https://github.com/RT-Thread/rt-thread/releases)
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[](https://travis-ci.org/RT-Thread/rt-thread)
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[](https://gitter.im/RT-Thread/rt-thread?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[](https://github.com/RT-Thread/rt-thread/pulls)
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[](https://github.com/RT-Thread/rt-thread/pulls)
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RT-Thread is an open source IoT operating system from China, which has strong scalability: from a tiny kernel running on a tiny core, for example ARM Cortex-M0, or Cortex-M3/4/7, to a rich feature system running on MIPS32, ARM Cortex-A8, ARM Cortex-A9 DualCore etc.
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## Overview ##
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RT-Thread RTOS like a traditional real-time operating system. The kernel has real-time multi-task scheduling, semaphore, mutex, mail box, message queue, signal etc. However, it has three different things:
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* Device Driver;
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* Component;
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* Dyanmic Module
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The device driver is more like a driver framework, UART, IIC, SPI, SDIO, USB device/host, EMAC, MTD NAND etc. The developer can easily add low level driver and board configuration, then combined with the upper framework, he/she can use lots of features.
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The Component is a software concept upon RT-Thread kernel, for example a shell (finsh/msh shell), virtual file system (FAT, YAFFS, UFFS, ROM/RAM file system etc), TCP/IP protocol stack (lwIP), POSIX (thread) interface etc. One component must be a directory under RT-Thread/Components and one component can be descripted by a SConscript file (then be compiled and linked into the system).
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The Dyanmic Module, formerly named as User Applicaion (UA) is a dyanmic loaded module or library, it can be compiled standalone without Kernel. Each Dyanmic Module has its own object list to manage thread/semaphore/kernel object which was created or initialized inside this UA. More information about UA, please visit another [git repo](https://github.com/RT-Thread/rtthread-apps).
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## Board Support Package ##
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RT-Thread RTOS can support many architectures:
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* ARM Cortex-M0
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* ARM Cortex-M3/M4/7
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* ARM Cortex-R4
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* ARM Cortex-A8/A9
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* ARM920T/ARM926 etc
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* MIPS32
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* x86
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* Andes
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* C-Sky
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* RISC-V
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* PowerPC
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## License ##
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RT-Thread is Open Source software under the Apache License 2.0 since RT-Thread v3.1.1. License and copyright information can be found within the code.
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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Since 9th of September 2018, PRs submitted by the community may be merged into the main line only after signing the Contributor License Agreement(CLA).
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## Usage ##
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RT-Thread RTOS uses [scons](http://www.scons.org) as building system. Therefore, please install scons and Python 2.7 firstly.
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So far, the RT-Thread scons building system support the command line compile or generate some IDE's project. There are some option varaibles in the scons building script (rtconfig.py):
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* ```CROSS_TOOL``` the compiler which you want to use, gcc/keil/iar.
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* ```EXEC_PATH``` the path of compiler.
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In SConstruct file:
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```RTT_ROOT``` This variable is the root directory of RT-Thread RTOS. If you build the porting in the bsp directory, you can use the default setting. Also, you can set the root directory in ```RTT_ROOT``` environment variable and not modify SConstruct files.
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When you set these variables correctly, you can use command:
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scons
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under BSP directory to simplely compile RT-Thread RTOS.
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If you want to generate the IDE's project file, you can use command:
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scons --target=mdk/mdk4/mdk5/iar/cb -s
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to generate the project file.
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NOTE: RT-Thread scons building system will tailor the system according to your rtconfig.h configuration header file. For example, if you disable the lwIP in the rtconfig.h by commenting the ```#define RT_USING_LWIP```, the generated project file should have no lwIP related files.
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## Contribution ##
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Please refer the contributors in the github. Thank all of RT-Thread Developers.
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