RT-Thread v3.0.3 has been released. The change log since v3.0.2:

Kernel

• Add scheduler protection when do cleanup for a detached thread;
• Fix the object_find issue when enable module feature;
• Improve POSIX signal support and add rt_signal_wait function and POSIX sigwait interface;
• When enable finsh shell, rtthread.h header file includes the API file of finsh. Therefore, the application code can use command export feature without finsh.h file;
• Improve the comments of rtdbg.h file. In RT-Thread, just use following code to add debug log feature:

    #define DBG_ENABLE

    #define DBG_SECTION_NAME    "[ MOD]"
    #define DBG_LEVEL           DBG_INFO
    #define DBG_COLOR
    #include <rtdbg.h>

When close the DBG_ENABLE definition, the debug log will be closed. Otherwise, the dbg_log(level, fmt, ...) can be used to print debug information.

DBG_SECTION_NAME - The prefix information for each log line; DBG_LEVEL - The debug log level; DBG_COLOR - Whether use color log in console.

Components

• Fix the flag issue of fopen in GNU GCC;
• Fix the pthread_detach issue when used for a detached pthread;
• Fix the _TIMESPEC_DEFINED issue in IAR 8;
• Add libc_stdio_get_console() interface for returns the fd of console;
• Move UI engine component as a standalone package;
• Add a unify TF/SD card driver on SPI device bus;
• Add soft-RTC device, therefore device can synchronize with network time and maintains the time with OS tick later;
• Change the open/fcntl/ioctl API to POSIX standard interface;
• Fix ramfs issue when update with RTT 3.0.x;
• Fix the elm fatfs umount issue; (liu2guang)
• ignore the O_CREAT flag when open a device file;
• Improve VCOM class driver in USB stack; (ChunfengMu, Aubr.Cool)

BSP

• Fix the potential issue when enable Cortex-M hardware FPU;
• Add v2m-mps2 bsp, which is used in Keil MDK5 for Cortex-M4/M7/M23/M33 simulation;
• Add sdcard driver for stm32f10x-HAL;(liu2guang)
• Improve GNU GCC support for stm32f10x-HAL;(Xeon Xu)
• simulator bsp can be used in Windows/Visual C++ and update SDL to v2.0.7;
• Add gk7102 bsp by gokemicro;(gokemicro)
• Add allwinner F1C100s ARM9 bsp;(uestczyh222)
• Fix some issues in peripherals drive library of NXP LPC54608/i.MX RT; (Valeriy Van)

Tools

• scons building script will automatically add _REENT_SMALL macro when enable newlib nano;
• Modify building script for Python 3.x and scons 3.0