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ChangeLog.md

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# RT-Thread v3.1.2 Change Log
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## Kernel
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* nothing
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## Components
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* When formatting the file system, adds FM_SFD option to create a volume in SFD format for FatFs; (HubretXie)
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* Add file system handle pointer in `struct dfs_fd' structure;
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* Fix stdio fd issue when POSIX api is used; (gbcwbz)
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* Fix the `fd_is_open()` issue: when the sub-path is the same in different mounted filesystem.
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* Change the critical lock/unlock to dfs_lock/unlock in `getcwd()` function of DFS (the critical lock/unlock is different in SMP environment);
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* Fix the `aio_result` issue, which is returned by `aio_read_work` in AIO; (fullhan)
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* Fix the mmap issue when the addr parameter is NULL; (fullhan)
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* Modify the `_sys_istty` function in armlibc to correctly handle STDIN/STDOUT/STDERR; (gbcwbz)
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* Modify the `_write_r` function in newlib to correctly handle stdout.
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* Fix the at_socket issue when socket is a null pointer; (thomas onegd)
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* Fix the select event issue in `at_recvfrom()` function in at_socket;
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* Divide SAL into `sal_socket_ops/sal_proto_ops` and sal_proto_ops is implemented with gethostbyname/getaddrinfo ops etc.
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* Add socket TLS layer in SAL, that is, upper application can be supported by encrypted transmission without considering lowlevel TLS at all.
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* Fix the length issue of `ulog_strcpy`, which should be not exceed `ULOG_LINE_BUF_SIZE`;
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* Add the macro definition of hexadecimal log output to ulog; (HubretXie)
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* Add uTest component. The uTest is a unit test framework on RT-Thread, and can also be used for automatic testing on board with external Python scripts.
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* Fix some compilation warnings and enumeration mismatches in drivers/audio;
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* Fix the `can_rx/can_tx` issue, which is not cleared to NULL when CAN device is closed in drivers/can; (xeonxu)
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* Fix drivers/hwtimer, time acquisition issue with counting down mode;
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* Add drivers/adc driver framework;
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* Fix the tick compensation issue when enable interrupt too early; (geniusgogo)
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* Add `RT_SERIAL_USING_DMA` option in drivers/serial;
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* Add QSPI support in drivers/spi framework;
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* Add QSPI support in SFUD (based on the QSPI peripheral of stm32); SFUD is upgraded to version 1.1.0;
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* Optimize SPI take/release function call in spi_msd;
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* Fix the `blk_size` issue in `rt_rbb_blk_alloc()`;
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* Fix the FS USB issue in `_get_descriptor` function;
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* Fix the empty password issue in AP mode of drivers/wlan;
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* Fix the return type issue in drivers/wlan;
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* Remove the duplicate opening file check when open a file;
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# BSP
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* Change the name parameter to `cosnt char *` in `rt_hw_interrupt_install` function; (liruncong)
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* Fix `$` warning issue in Kconfig files of each BSP;
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* Add the LPC54114-lite BSP, including GPIO, I2C, SDCard, SPI, SPI Flash, UART driver;
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* Add Nuvoton-M487 BSP, including UART, EMAC driver; (Bluebear 233)
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* Fix the CAN driver issue in STM32F4XX-HAL BSP; (xeonxu)
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* Fix UART DMA settings issue in STM32F10x/STM32F40x BSP; (zhouchuanfu)
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* Fix the HEAP_BEGIN definition issue in STM32H743-Nucleo BSP; (nongxiaoming)
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* Fix GPIO configuration issue in stm32f10x-HAL; (Wu Han)
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* Change stm32f107 BSP as main function entry; (whj4674672)
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* Fix the serial interrupt handling issue in stm32f10x BSP;
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* Add PWM, RTC and watchdog drivers to stm32f10x-HAL BSP; (XXXXzzzz000)
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* Fix the watchdog driver issue in stm32f4xx-HAL BSP; (XXXXzzzz000)
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* Use lwIP version 2.x in stm32f40x/stm32f107 BSP.
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* Fix the link issue when enable CmBacktrace package in stm32f4xx-HAL BSP; (xeonxu)
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* Support Audio and microphones features in stm32f429-apollo BSP;
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* Enable dlmodule support in x86 BSP; (SASANO Takayoshi)
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* Addd uTest section in the link script of qemu-vexpress-a9/stm32f429-atk-apollo BSP for automatic testing;
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* Change the license to Apache License v2.0 in Godson 1C BSP; (sundm75)
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* Add the new BSP framework for STM32 serial chip, such as STM32 G0/F0/L0/F1/F4/F7/H7. In new BSP framework, the SoC drivers is reused. And in same time, lots of STM32 boards are supportted with new BSP framework:
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* STM32F091-Nucleo Development Board BSP
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* STM32F411-Nucleo Development Board BSP
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* STM32L432-Nucleo Development Board BSP; (sun_shine)
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* STM32F407-Discovery Development Board BSP
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* STM32F446-Nucleo Development Board BSP; (andeyqi)
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* STM32F746-Discovery Development Board BSP; (jinsheng)
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* STM32F767-Nucleo Development Board BSP; (e31207077)
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* STM32G071-Nucleo Development Board BSP;
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* ATK STM32F103 NANO Development Board BSP
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* ATK STM32F407 Explorer Development Board BSP
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* ATK STM32F429 Apollo Development Board BSP
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* ATK STM32F767 Apollo Development Board BSP
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* ATK STM32L475 Pandora IoT Development Board BSP
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* Fire STM32F103 Arbitrary Development Board BSP
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* Fire STM32F429 Challenger Development Board BSP
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* Fire STM32F767 Challenger Development Board BSP; (Hao Zhu)
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* ArmFly STM32F429-v6 Development Board BSP
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* STM32F103 iBox development board BSP; (dingo1688)
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* Dofly STM32F103 Development Board; (FindYGL)
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* STM32F107 uC/Eval Development Board BSP; (whj4674672)
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* and more, there are more developers involved for stm32 BSP framework, they are HubretXie, Hao Zhu, e190, etc. to improve the STM32 public driver.
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* Add SWM320 BSP of Synwit.cn, including GPIO, HW Timer, I2C, Watchdog, PWM, RTC, SPI, UART, etc.; (provided and maintained by Synwit)
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* Add TI TMS320F28379D BSP, the first DSP chip supported on RT-Thread; (xuzhuoyi)
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* Fix USB driver issue in X1000; (Zhou YanJie)
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# Tool
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* Provide more inforamtion when the tool chain does not exist;
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* Add a draft Segger Embedded Studio project file generation command. Note that the tool chain in SES is a special version not the newlib.
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* Fix the IAR library link command issue when use scons command line under;
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* Fix the BSP path issue in scons `str(Dir('#'))`;
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* Add `scons --pyconfig-silent` command to add some Kconfig configurations and to generate `.config` and `rtconfig.h` files;
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* Update the `scons --dist` command to adapt to the new BSP framework;
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* Modify the mkromfs.py script. Fix the corresponding C code generation When the romfs contains empty files or empty folders;
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* Fix the issue of version string comparison issue for GNU GCC version in utils.py;
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* ENV updated to V1.1.0
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* Provide better prompt information to improve user experience;
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* Add `system32` path to environment variables to avoid the `cmd` command cannot be found;
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* Add `PYTHONHOME` variable to environment variables to avoid PYTHON environment issue;
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# RT-Thread v3.1.1 Change Log
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## Kernel
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* 修正USB host代码的编译错误;
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* 修正sensor框架回调函数的问题;
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* 修正pin设备注册时的设备名称问题;
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而v2.1.0 alpha这个技术预览版则沿着最初设定的roadmap技术路线进行,这其中主要包括:
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* lwip更深度的集成:把它集成到RT-Thread的文件系统接口中,这样Linux/Unix下的一些socket网络应用能够更顺利的移植到RT-Thread上,也为以后可以应用到更多地方的select接口铺路。
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以下是自v2.0.0 RC版本以来的详细更改记录。后续我还会给出v2.0.0版本自v1.2.x版本的主要不同、看点,以及给出下一个版本的roadmap规划。
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## 内核
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* console以RT_DEVICE_FLAG_STREAM参数打开字符设备;
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* 在rt_memheap_free中加入更多的断言检查;
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* 添加VBUS组件用于Linux与RT-Thread系统之间,RT-Thread与RT-Thread系统之间通信(睿赛德服务公司捐赠);
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* 增加lwIP/NAT组件,可以做多个网口间的地址转换(Hicard);
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* 增加lwIP/DHCP服务端,用于向客户端分配IP地址(睿赛德服务公司提供);
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## BSP
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* 修正LPC4357串口驱动初始化时过早打开中断的问题(nongxiaoming);
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* 启动timer前,对timer进行强制移除;
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* 在执行soft timer超时函数时,打开调度器锁;
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* 新增块设备的自动刷新参数,RT_DEVICE_CTRL_BLK_AUTOREFRESH;
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## 工具
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* 修正scons命令编译时,选择keil mdk (armcc)编译器时,命令行太长编译失败的问题;
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# RT-Thread 2.0.0 Alpha更改说明
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发布时间:2014/4/8
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RT-Thread 2.0.0分支的第一个技术预览版本,仅用于展示2.0.0发展分支的演化动向(按照roadmap,2.0.0这个分支会有一部分RT-Thread和Linux互补性的技术,为Linux增加更好的实时性,为RT-Thread增加更多的功能性,这份技术预览版正是朝着这个目标而努力),欢迎反馈建议和问题。
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## 组件
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# RT-Thread 1.2.1更改说明
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发布时间: 2014/4/8
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在原有的1.2.0版本的bug修正版本,也是1.2.0系列的第一个修正版本,原则上不添加任何的新功能,我们尽量会按照每个季度一个修订版本的方式推进。大家在使用的过程中有什么问题还请反馈给我们,这些问题很可能会在下个版本中修正!
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以下是更改记录:
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发布时间: 2014/1/6
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实现roadmap中提到的大部分内容
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1,文档方面已完成《RT-Thread编程手册》,同时还有论坛上jiezhi童鞋的《一起来学RT-Thread系列连载教程》
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2,BSP分支方面新增cortext-A8(beaglebone),cortext-R4(rm48x50),UNITY-2(SEP6200),lpc408x的移植
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# RT-Thread 1.2.0RC更改说明
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发布时间: 2013/10/10/ 10:19
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主要说明: 该版本新增ARM Cortex-A8的支持(BeagleBone),新增UNITY-2内核的支持(SEP6200),新增Ymodem协议。
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变更履历
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版本: RT-Thread 1.2.0 Beta 版本
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发布时间: 2013/6/30
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进过开发人员三个月的努力,RT-Thread 1.2.0 Beta 版本如期发布。
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该版本默认采用lwIP 1.4.1协议栈,USB device stack也进一步完善。加入 log_trace 子系统,加入组件初始化升级版本,加入 ARM Cortex-R 的移植。
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版本: RT-Thread 1.2.0 Alpha版本
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发布时间: 2013/4/10
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遵循2013年RT-Thread roadmap,RT-Thread 1.2.0 Alpha版本发布,Alpha意味着此版本为技术预览版,仅用于展示RT-Thread 1.2.0未来的发展方向,并不适合于开发正式产品。RT-Thread 1.2.0版本是1.1.x系列的下一个分支,这个分支主要体现的是RT-Thread 1.x系列的文档情况。当然也有一些功能、代码方面的增强。
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伴随着新版本的到来,RT-Thread有几个重大的转变:

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