Single-Tasking Programs

Both embedded and standard C programs start execution with the main C function. In an embedded application, main is usually implemented as an endless loop and can be thought of as a single task which is executed continuously. For example:

void main (void)
{
while (1)               /* repeat forever */
  {
  do_something ();      /* execute the do_something 'task' */
  }
}

In this example, the do_something function can be thought of as a single task. Since there is only one task that executes, there is no need for multitasking capability or a multitasking operating system.