说明：  这仅仅是一个用于演示ICCAVR中调用汇编语言中断函数的实例，这个演示的处理方法也可以用于一般非中断汇编函数的调用。本实例中演示了字节变量和字变量在汇编中的引用和运算处理
(this is only a demo ICCAVR Calling assembly language interrupt function examples, the presentation approach also can be used for general non-interrupted compilation function call. This example demonstrates a variable byte characters and variables in the compilation of the application and processing operations)