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Real-Time Concepts for Embedded SystemsFor now, note that the RTOS abstracts the application code from the hardware and provides software objects and services that facilitate embedded-systems application development. 3.4.3 Application Software Initialization After the RTOS is initialized and running with the required components, control is transferred to a user-defined application. This transfer takes place when the RTOS code calls a predefined function (that is RTOS dependent) which is implemented by the user-defined application. At this point, the RTOS services are available. This application also goes through initialization, during which all necessary objects, services, data structures, variables, and other constructs are declared and implemented. For a simple, user application such as the hello world application, all the work can be done in this function. This user-defined application (maybe the hello world application) might finally produce its impressive output. On the other hand, for a complex application, it will create task or tasks to perform the work ...» |
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