Cortex-M/R 内核启动流程之执行阶段

  The software of an embedded application is typically implemented as a loop which is either interrupt-driven or uses polling for controlling external interaction or internal events. For an interrupt-driven system, the interrupts are typically initialized at the beginning of the main function.嵌入式应用程序的软件通常实现为循环，该循环可以是中断驱动的，也可以使用轮询来控制外部交互或内部事件。 对于中断驱动的系统，中断通常在主函数的开头初始化。
1 k; r' G; I+ C/ H) ?  In a system with real-time behavior and where responsiveness is critical, a multi-task system might be required. This means that your application software should be complemented with a real-time operating system. In this case, the RTOS and the different tasks must also be initialized at the beginning of the main function. 在具有实时行为且响应性至关重要的系统中，可能需要多任务系统。 这意味着您的应用程序软件应该配备实时操作系统。 在这种情况下，还必须在main函数的开头初始化RTOS和不同的任务。