51 on a simple operating system, to create tasks, delete tasks, task scheduling, system delay, hang mission, send a message, waiting for news, CPU usage statistics, the system time, serial port to send, receive data and serial resource management functions. Simulation using Keil

OS51
....\51_00_OS
....\51_00_OS.hex
....\51_00_OS.M51
....\51_00_OS.Opt
....\51_00_OS.plg
....\51_00_OS.Uv2
....\51_00_OS_Opt.Bak
....\51_00_OS_Uv2.Bak
....\AT89X52.h
....\main.c
....\main.h
....\main.LST
....\main.OBJ
....\OS_core.c
....\OS_core.h
....\OS_core.LST
....\OS_core.OBJ
....\task_switch.C
....\task_switch.H
....\task_switch.ls1
....\task_switch.LST
....\task_switch.OBJ
....\task_switch.SRC
....\task_switch.__i
....\UART.c
....\UART.h
....\UART.LST
....\UART.OBJ
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