The present invention is to develop a real-time operating system kernel (Kernel) and independent of the application, to which the present invention is, the real-time operating system in a multi-threaded (Multi Thread) method using the real time operating system (Real Time Operating System), unlike the prior art methods are constrained at the time of application development in the operating system kernel, in a multi-threaded system, real-time operating system operating system layer and application layer between the position of the common developer OSAL (Common Operating System Adaptation Layer) for each operating system function function API (Application Program Interface) function for each package, and after that, the application developed for generating the necessary API functions related tasks extracted from the common library OSAL generated the task and, according to the menu screen generated by the display task to OSD (On Screen Display), will be developed in the application without constraints of each of the operating system kernel.
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