基于A8處理器的圖像采集與觸摸屏處理的技術研究
[Abstract]:In recent years, smart electronic terminal devices have been widely used in our life, making our life colorful, but also gradually changing our life. As a free and open source operating system, Android has portability. Customizable and good user experience and other characteristics. Widely used in various smart terminal devices, such as smart phones, electronic photo frames, tablets, MP3 and so on. As the input device of these terminal devices, touch screen has been paid more and more attention to. It has many characteristics such as durable, quick reaction, saving space, easy to operate and so on. It is an attractive multimedia interactive device, which can transform all kinds of intelligent terminal products. The hardware platform of this thesis is based on Samsung S5PV210 main chip. S5PV210 uses the ARM Cortex-A8 kernel with main frequency up to 1 G Hz. The software platform adopts the free and open source version 2.3 of Android operating system, which mainly realizes the development of camera module controller and sensor driver. In the touch screen module, the algorithm to prevent the malicious operation of the touch screen calibration and the five-point calibration algorithm are designed and implemented. This paper first analyzes the performance of hardware platform and the structure of Android system based on Linux kernel, constructs the development environment of the project, and carries out the transplant of Android system on the development board. Secondly, after analyzing the hardware and system architecture of the camera, the controller driver and sensor driver of the camera module on the development board are developed. The interrupt registration function and register interface configuration of touch screen are realized in touch screen module, and the algorithm principle and implementation method to prevent malicious operation of touch screen calibration in the sampling process of touch screen calibration are introduced. Five sets of filtered sampling data are processed by the five point calibration algorithm to ensure the accuracy of calibration coefficient. The event type triggered by the touch action is defined during the running of the system.
【學位授予單位】:哈爾濱工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:TP334.3;TP316
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