于基单片机的指纹识别系统设计本科论文.doc

摘 要 随着科学技术的发展人们的安全意识也越来越强代替传统身份识别最安全可靠的方法之一 结果表明，该套指纹识别系统算法性能可靠，指纹识别率高，可以实现预先制定的目标，完成指纹识别的功能。 关键词：指纹识别；飞思卡尔单片机；串口 Abstract With the development of science and technology, peoples safety consciousness is becoming more and more strong, the fingerprint has the uniqueness and invariance for life, so the fingerprint identification is instead of the traditional identification is one of the most safe and reliable methods. This design is based on Freescale Kinetis K60N512 series microcontroller, fingerprint identification module is the product of Growup company, the module with high performance DSP chip, and the DSP chip with complete fingerprint identification algorithm and protocol, fingerprint’s acquisition, fingerprint’s search and storage, and other functions.Module and microcontroller communication through the serial port.Fingerprint identification system use CH340G chip change TTL level to RS-232 level, and then realize the interaction with a PC, the PC shows the result of fingerprint identification.The thesis introduces the basic algorithm implementation process, at the same time, this article introduces the basic principle of the watchdog module inside K60N512 chip and the start process.Results show that the algorithm of fingerprint identification system is reliable, fingerprint recognition rate is high, and can achieve target of fingerprint identification. Key Words: Fingerprint identification,Freescale Kinetis,UART 目 录 摘 要 I Abstract II 1 绪论 1 1.1 选题背景和研究意义 1 1.2 国内外研究现状 1 2 指纹识别的基本原理 1 2.1 指纹图像的采集 1 2.2 指纹图像预处理 2 2.3 指纹图像特征点的提取 4 2.4 指纹图像伪细节点的处理 4 2.5 指纹特征匹配 5 2.6 评价指纹识别系统算法性能的指标 5 3 课题的内容和目标 6 3.1 指纹识别系统的硬件设计 6 3.2 本设计所使用单片机简介 6 3.3 本设计所使用的指纹模块简介 7 4 主程序分析 7 4.1 Cotex-M4内核寄存器简介 8 4.2 Cotex-M4中断机制 8 4.3 K60N512启动代码分析 9 4.4 K60N512看门狗程序分析 11 4.5 Flash软件构件简介 11 4.6 Kinetis 的FlexBus模块简介 11 4.7 K60N512异步接收器/发送器(UART)简介 11 4.8 指纹模块指令介绍 12 4.8.1 指纹图像获取 12 4.8.2 生成特征 15 4.8.3 生成模板 15 4.8.4 储存模板 16 4.8.5 高速有哪些信誉好的足球投注网站 16 4.9 补充说明 17 结 论 18 致