一键多功能按键识别技术：在我们生活中，我们很容易通过这个叫张三，那个叫李四，另外一个是王五；那是因为每个人有不同的名子，我们就很快认出，同样，对于要通过一个按键来识别每种不同的功能，我们给每个不同的功能模块用不同的ID号标识，这样，每按下一次按键，ID的值是不相同的，所以单片机就很容易识别不同功能的身份了。-A key function key recognition technology in our life, we can easily by the name Zhang San, the name is Li Si, another is Wang Wu　it is because everyone has a different name, we will soon know, also, for a button to pass to identify the different functions of each different. The ID mark, for we have different functions to each module, each time you press the button, the value of ID is not the same, so SCM is easy to identify the identity of the different functions.