具備連網印表機之嵌入式配接器系統設計與實現

隨著資訊科技的不斷演進，印表機的傳輸方式也逐漸被無線傳輸技術取代。此外，在即時列印的需求以及環保意識抬頭下，熱感式列印方式已逐漸被淘汰，使得無線列印或是嵌入式列印裝置的需求不斷地提升。因此，本研究目的在於整合有線與無線的即時列印功能，並設計出一套具備連網印表機的嵌入式配接器系統。本系統包含兩個部份：嵌入式列印伺服器與Pictbridge配接裝置。其中嵌入式列印伺服器的核心平台是採用ARM Cortex A8系列的Samsung S5PV210處理器，並使用高移植性與穩定性的Android作業系統。其中，在嵌入式列印伺服器上移植SPI介面與觸控式螢幕的驅動程式，並使用Android應用程式框架層的API，來設計一個可提供使用者便利操作的人機互動之介面程式。而Pictbridge配接裝置主要是建立和Pictbridge印表機之間的連結，並根據實際應用可區分為有線與無線兩部份。有線部分是根據Pictbridge標準來實現，並利用Pictbridge特性來達到即時列印的功能。因此，無須透過電腦即可完成嵌入式列印功能。另一個無線部分則是使用Wi-Fi模組，並以Wi-Fi直連的方式直接將影像資料傳送至印表機端實現列印功能。使用者可以透過Android嵌入式平台來選擇與設定列印方式。最後，經實際測試與驗證，證明本研究能夠實現有線與無線傳輸列印功能。除了提供連網列印功能的可攜性之外，更大幅地減少連網列印功能的複雜性與建置的成本。

關鍵字

Android ； Pictbridge ； Wi-Fi直連；嵌入式系統

並列摘要

With the evolution of information technology, the transmission of the printer is gradually being replaced by wireless transmission technology. Owing to the increasing demand for immediate printing and the rise of environmental consciousness, the traditional thermal printing methods have gradually been eliminated, replacing with the up-to-date wireless printing device and the embedded printing device. Therefore, this study aims to integrate wired and wireless instant printing functionality and the embedded adapter system with networked printer for immediate printing function. The system consists of two parts: an Embedded Print Server and Pictbridge Adapter Device. The core platform of the system is using ARM Cortex A8 Series Samsung S5PV210 processor and the Android operating system with high portability and stability. The SPI interface and touch screen’drivers are porting on embedded adapter system. The Android Application Framework layer is utilized to develop the user interface program which provids convenient operation of human-computer interaction. The Pictbridge Adapter Device is primarily to establish a link between the Pictbridge printers, according to the practical application, can be divided into two parts, both wired and wireless type. The wired part is achieved in accordance with Pictbridge standard, and Pictbridge functionality is utilized to achieve instant print without using computers. The other part is the use of a wireless Wi-Fi module and Wi-Fi Direct connect to the image data directly sending to the printer side to implement printing. The printing mode could be selected and set via Android embedded platform. Finally, the wired and wireless transmission of printing capabilities is implemented in the system through actual testing and verification. The results confirms the system improves the networking printing features portability and, more significantly reduce the complexity and building costs of printing features networking.