In this experiment, reflecting the priority of embedded real-time kernel preemptive scheduling strategy, and appear as mutually exclusive access to shared resources and priority inversion phenomenon occurs

Exp5 priority\Exp5.mcp
.............\...._Data\CWSettingsWindows.stg
.............\.........\Debug\Exp5.axf
.............\.........\.....\ObjectCode\cpu.o
.............\.........\.....\..........\drivers.o
.............\.........\.....\..........\exception.o
.............\.........\.....\..........\heap.o
.............\.........\.....\..........\isr.o
.............\.........\.....\..........\lib.o
.............\.........\.....\..........\main.o
.............\.........\.....\..........\OSAddTask.o
.............\.........\.....\..........\os_core.o
.............\.........\.....\..........\os_cpu_a.o
.............\.........\.....\..........\os_cpu_c.o
.............\.........\.....\..........\os_dbg.o
.............\.........\.....\..........\os_flag.o
.............\.........\.....\..........\os_mbox.o
.............\.........\.....\..........\os_mem.o
.............\.........\.....\..........\os_mutex.o
.............\.........\.....\..........\os_q.o
.............\.........\.....\..........\os_sem.o
.............\.........\.....\..........\os_task.o
.............\.........\.....\..........\os_time.o
.............\.........\.....\..........\pagetable.o
.............\.........\.....\..........\retarget.o
.............\.........\.....\..........\serial-2410.o
.............\.........\.....\..........\stack.o
.............\.........\.....\..........\Startup.o
.............\.........\.....\..........\Uart.o
.............\.........\.....\..........\UHAL.o
.............\.........\.....\system.bin
.............\.........\.....\TargetDataWindows.tdt
.............\.........\Release\TargetDataWindows.tdt
.............\inc\bitfield.h
.............\...\drivers.h
.............\...\..v\cpu.h
.............\...\...\gpio.h
.............\...\...\reg2410.h
.............\...\...\Serial.h
.............\...\macro.h
.............\...\sys\io.h
.............\...\...\lib.h
.............\...\...\Loadfile.h
.............\...\...\sysdrv.h
.............\...\...\uart.h
.............\...\sysconfig.h
.............\..it\exception.s
.............\....\heap.s
.............\....\pagetable.s
.............\....\readme.txt
.............\....\retarget.c
.............\....\scat_ram.scf
.............\....\scat_ram_release.scf
.............\....\scat_rom.scf
.............\....\stack.s
.............\res\U12x12.fnt
.............\...\U16x16.fnt
.............\...\U24x24.fnt
.............\src\drv\cpu.c
.............\...\...\drivers.c
.............\...\...\serial-2410.c
.............\...\GUI\DirectDisplay.h
.............\...\...\display.h
.............\...\...\Figure.h
.............\...\...\gui.h
.............\...\main.c
.............\...\sys\lib.c
.............\...\...\Uart.c
.............\.tartup\2410addr.s
.............\.......\Startup.s
.............\ucos-ii\ADD\control.h
.............\.......\...\List.h
.............\.......\...\osaddition.h
.............\.......\...\OSAddTask.c
.............\.......\...\OSAddTask.h
.............\.......\arch\os_cpu.h
.............\.......\....\os_cpu_a.s
.............\.......\....\os_cpu_c.c
.............\.......\includes.h
.............\.......\os_cfg.h
.............\.......\os_core.c
.............\.......\os_dbg.c
.............\.......\os_flag.c
.............\.......\os_mbox.c
.............\.......\os_mem.c
.............\.......\os_mutex.c
.............\.......\os_q.c
.............\.......\os_sem.c
.............\.......\os_task.c
.............\.......\os_time.c
.............\.......\ucos_ii.h
.............\.......\.hal\isr.c
.............\.......\....\isr.h
.............\.......\....\UHAL.c
.............\.......\....\uhal.h
.............\Exp5_Data\Debug\ObjectCode
.............\.........\Debug
.............\.........\Release
.............\inc\drv
.............\...\sys

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