The first thing that should be done in the handler OPEN routine is to set the pointers and lengths of the IO Information Feedback data structures. 应该在Handlder程序OPEN例程中完成的第一件事是设置IOInformationFeedback数据结构的指针和长度。
It invokes the card driver's event handler routine during events like card insertion, card removal, and low battery. 它在一些事件(比如卡插入、卡移出以及低电量)发生时调用卡驱动程序的事件处理程序例程。
When the number of ticks reaches zero for a timer, it calls the timeout handler routine to handle the corresponding timeout for that connection. 当计时器的计时单元数达到零时,它将调用超时处理程序例程为该连接处理相应的超时。
When the SWI handler gets a request for a particular routine number it finds the position of the routine and executes it, passing any data. 当SWI处理程序得到对特定的例程编号的一个请求的时候,它找到这个例程的位置并执行它,并传递(有关的)任何数据。
Don't worry if you're not sure what each and every element of the event handler routine does. 您可能不知道这个事件处理程序例程的每个元素都是用来做什么的,不过不必担心。