实时线程操作系统（RT-Thread）是国内RT-Thread工作室精心打造的开源实时操作系统，历时4年的呕心沥血开发，力图突破国内没有小型开源实时操作系统的局面，它不仅仅是一款开源意义的实时操作系统，也是一款产品级别的实时操作系统，它已经被国内十多所企业所采用，被证明是一款能够长时间稳定持续运行的操作系统。
实时线程操作系统从0.2.4正式版发布以来，目前已经一年多了，0.3.0开发分支在稳步进行中，亦收到来自国内十数个缺陷反馈、补丁修正，从针对STM32的beta1版本、beta2版本到LM3S的beta1版本，它总是力求发布一个稳定的版本，向着0.3.0正式版、稳定版迈进，而现在，就是RT-Thread开发工作室献上的0.3.0第一候选版，面向ST STM32微控制器（ARM公司的最新Cortex-M3构架处理器）。
The Real-time Thread Operating System is an open source real-time operating system developed by the RT-Thread Studio based in China, after four years' fully concentrated development. It is aimed to change the current situation in China that there is no domestic owned Intellectual Patent (IP) in the small scale open source real-time operating system area. It is a real-time operating system not only on the open source level but also on the commercial standard level. Having been used by more than ten companies in China, it proved to be an operating system running stably for a long time.
It has been one year since our RT-Thread official version 0.2.4 has been released. The version 0.3.0 branch is currently under development. We have received lot of feedbacks from our customers, and have been fixing bugs as well as making big progress. From the beta 1 and beta 2 versions of STM32, to the beta 1 version of LM3S, we kept developing step by step towards the stable official Release 0.3.0. Now, RT-Thread Studio is proud to announce that the first 0.3.0 release candidate edition has been released. It is developed for the ST STM32 microcontroller (the latest processor with Cortex-M3 Architecture developed by ARM).
这个版本自0.3.0 beta2版本以来的更新记录：
内核:
- 添加rt_memory_info函数用于获得系统内存信息情况;
- 添加rt_calloc函数声明;
- 添加minilibc小型C库，仅用于GCC编译环境;
- 添加GCC编译支持，采用scons构建系统;
- 添加software timer的实现;
- 更改semaphore和mutex值为无符号值;
- 更改邮箱、消息队列超时值为0，当再次计算出下一超时点为负数时;
- 更改内存池钩子函数参数;
- 移除不存在的钩子函数，添加缺少的对象钩子函数声明;
- 从IPC中移除fast_event;
- 修正event clear的bug;
- 修正memory重新分配的bug;
- 修正串口初始化的问题;
- 修正mutex_release bug;
- 修正周期性定时器在超时时停止自身的bug;
- 修正内存池初始化的bug;
- 修正设备初始化函数中激活参数的bug;
- 修正RT_IPC_FLAG_PRIO处理的bug;
LwIP轻型TCP/IP协议栈：
- 升级LwIP到1.3.1版本;
- 在LwIP中添加list_if，set_if，set_dns命令;
- 更改DHCP休眠时间为微秒;
- 修正LwIP DHCP选项问题;
- 修正lwip_select函数返回值问题;
文件系统：
- 添加ELM FatFs文件系统;
- 修正EFSL的编译警告;
- 修正closedir中不释放fd的bug;
- 修正lseek中SEEK_END处理的bug;
FinSH shell:
- finsh添加退格键的支持;
- finsh添加历史记录、符号自动完成的支持;
- 修正finsh不能使用USART2的问题;
STM32相关:
- 升级ST固件库到3.1.0;
- STM32添加LD、MD、HD、CL设备的支持;
- STM32上添加DM9000A、STM32F107以太网驱动;
- 修正rt_serial_getc函数的bug;
- 修正CM3上下文切换时被高优先级中断抢占的问题;
- 修正rt_realloc函数中关于内存使用统计的bug;
- 修正当缓冲中不存在数据时rt_serial_read的bug;
- 修正serial发送中断的bug;
- 修正Keil MDK 3.5以下版本编译错误的问题;
这个版本是0.3.0正式版本的候选版本，原使用beta1或beta2版本的用户，强烈建议更新的新的版本来。欢迎反馈您的信息给RT-Thread论坛。
官网：http://www.rt-thread.org/web/
王中云 于 2009-12-29 21:16:32发表:
鼓掌
beipian 于 2009-12-29 20:36:45发表:
路过支持