详细讨论了在打印过程中遇到外部中断时的程序处理方法。

It has detailed discuss for the program process methods when meeting with external interrupt during the printing procedure.

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当流程长时间运行时，您可以向任何范围添加事件处理程序(长时间运行是指流程不能被中断并且可以等待外部异步输入)。

You can add an event handler to any scope when a process is long running (as we will explain, long running means that the process is interruptible and can wait for external asynchronous inputs).

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在硬件设计主要介绍系统组成中的外部存储器模块与视频输入输出模块，介绍了使用片上支持库编写DM642中视频驱动程序的方法，以及编写过程中DM642中断和直接存储器存取（DMA）的应用；

The hardware chapter introduces the external memory module and video I/O module, programs video-driver for the DM642 by using CSL, discuss the applications of interrupt and direct memory access (DMA).

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