我换了两台电脑都没有通过，请问你的操作系统是什么？ 报错报的是不是： c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/bin/ld.exe: c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/lib/thumb/v7-m/nofp\libc_nano.a(lib_a-abort.o): in function `abort': abort.c:(.text.abort+0xa): undefined reference to `_exit' c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/bin/ld.exe: c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/lib/thumb/v7-m/nofp\libc_nano.a(lib_a-signalr.o): in function `_kill_r': signalr.c:(.text._kill_r+0xe): undefined reference to `_kill' c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/bin/ld.exe: c:/program files (x86)/on semiconductor/ide_v3.4.0.48/arm_tools/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/lib/thumb/v7-m/nofp\libc_nano.a(lib_a-signalr.o): in function `_getpid_r': signalr.c:(.text._getpid_r+0x0): undefined reference to `_getpid'

可以用单片机实现的多媒体播放器中使用RTOS，可分为相册显示任务、日期显示任务、音乐播放任务、网络处理任务（实现天气预报）、蓝牙连接（APP连接）等任务。使用RTOS可以使各任务运行互不冲突，实现产品在低成本条件下的功能多样化

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