毕业设计 基于ARM的图像采集系统的设计

关键词：嵌入式；图像采集；ARM；STM32；OV7670
辽宁科技大学本科生毕业设计（论文）
第 II页
Based on ARM of image collection system design
Abstract
In recent years, with the progress of science and technology as well as human people to safe, convenient and the pursuit of quality of life, image acquisition is increasingly being applied to intelligent household, image recognition, environment monitor, etc. This article through studies the current digital image acquisition system research and development trend, design a kind of based on embedded ARM of portable digital image acquisition system, and the system some problems in the design process are also discussed, this paper lays emphasis on the research of the system hardware design and software realization. In this paper the design of embedded image acquisition system is used to ARM Cortex-M3 core STM32 as the master chip, main control chip control OV7670 CMOS sensor for first image collection, then the main control chip will control the image data storage into the FIFO memory AL422B, finally the image through the main controller collection to the touch screen display, or to store in SD card. This image acquisition system with just one ARM chips will achieve the function of OV7670 control, timing synchronization, data acquisition and processing, and other functions, system with low cost, compact structure, the function is strong. At the same time because the design of the low power consumption and low voltage sensor processor chips, the system of power consumption is low, the system can easily transplanted into the embedded mobile devices, has certain practical value.
2 总体设计.............................................................................................................3
2.1 功能需求...................................................................................................................... 3 2.2 系统工作原理.............................................................................................................. 3 2.3 系统软硬件规划.......................................................................................................... 4
2.3.1 硬件规划........................................................................................................... 4 2.3.2 软件规划........................................................................................................... 5
3.2.1 处理器............................................................................................................... 7 3.2.2 摄像头............................................................................................................... 8 3.2.3 显示面板........................................................................................................... 8 3.2.4 先进先出数据缓冲器（FIFO）.......................................................................9 3.2.5 电阻式触摸屏感应芯片................................................................................... 9 3.2.6 电源芯片......................................................................................................... 10 3.3 原理图........................................................................................................................ 10 3.3.1 电源电路......................................................................................................... 10 3.3.2 摄像头及数据缓冲电路................................................................................. 10 3.3.3 处理器电路......................................................................................................11 3.3.4 触摸屏电路..................................................................................................... 12 3.4 PCB 设计.................................................................................................................... 13
Hale Waihona Puke Keyword: flushbonading ; image data acquisition ; ARM ; STM32; system design
辽宁科技大学本科生毕业设计（论文）
第 III页
目录
摘要........................................................................................................................ I
辽宁科技大学本科生毕业设计（论文）
第 I页
基于 ARM 的图像采集系统的设计
摘要
近年来，随着人类科技的不断进步以及人们对安全、方便、快捷的优质生活的不断 追求，图像采集已经越来越多地被应用到智能家居、图像识别、环境监控等领域。本文 通过研究当前数字图像采集系统的研究成果和发展趋势，设计了一种基于嵌入式 ARM 的便携式数字图像采集系统,并对该系统设计过程中的若干问题进行了简单探讨，论文重 点研究了系统的硬件设计和软件实现。本文所设计的嵌入式图像采集系统是采用以 ARM Cortex-M3 为内核的 STM32 作为主控芯片，主控芯片先控制 CMOS 传感器 OV7670 进行图像采集，然后由主控芯片控制其将图像数据存放入 FIFO 存储器 AL422B 中，最 后将采集的图像通过主控制器显示到触摸屏上，或者存储到 SD 卡内。该图像采集系统 仅用一个 ARM 芯片就实现了对 OV7670 的功能控制、时序同步、数据采集与处理等功 能，系统成本低，结构紧凑，功能强大。同时由于本设计采用低电压低功耗的传感器及 处理器芯片，使整个系统的功耗很低，可以很容易将该系统移植到嵌入式移动设备上， 具有一定的实用价值。