利用单片机的IS P功能重新对单片机编程，植入串口读数程序。
Then the ISP function of MCU was used to program the MCU once again and plant serial read number program.
我们的应用程序有多个在大多数情况下只和数据库“A”打交道的服务层方法；它们偶尔也会从数据库“B”中获取只读数据。
Our application has several service layer methods which only deal with database “A” in most instances; however occasionally they also retrieve read-only data from database “B”.
为了说明这些基本组件，我们将使用处理色度计(用三基色法读数测量颜色的设备)读数的应用程序中一段简单的xml片段。
In order to illustrate these basic components, we will use a simple XML fragment from an application dealing with readings from colorimeters (devices that measure colors using tri-stimulus readings).
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