嵌入式指纹采集系统的研究与设计----指纹采集与综合设计毕业设计.doc

嵌入式指纹采集系统的研究与设计——指纹采集与综合设计 摘 要 μC/OS-Ⅱ操作系统来构建一个嵌入式指纹采集系统。 而后，根据设计要求对指纹芯片进行了选型，确定了系统的总体设计方案，设计了硬件开发平台；在软件方面，编写并调试了 FPS200驱动程序、指纹采集程序、串行通信程序等。 最后，文中对调试过程中碰到的一些问题进行了阐述，给出了解决方法，并对进一步优化系统提出了建议。 关键词：μC/OS-Ⅱ；ARM615The Investigation and Design of Embedded Fingerprint Acquisition System——Fingerprint Acquisition and Comprehensive Design Abstract Fingerprint data acquisition is the most pivotal sector in the fingerprint identification technology. As the rapid development of fingerprint sensors and the wide application of related technology, high quality fingerprint image acquisition will become a significant issue. This paper did some elementary research on embedded automated fingerprint acquisition system, it mainly includes the following several aspects: Firstly, this paper analyses the study actuality and development direction of this task, and explains the necessity of this task. Thinking of the high performance and low cost of ARM-chip, in this paper we construct an embedded fingerprint acquisition system based on the EasyARM615 and μC/OS-Ⅱ. Secondly, this paper selects the fingerprint chips, confirms the system overall concept, designs the hardware of the system. As the software aspect, we have designed the FPS200 driver, the fingerprint gathering procedure, the communication serial procedure and so on. At last, this paper elaborates some problems encountered in system debugging, gives methods how to solve them, and some suggestions for system optimization are also provided. Key words: FPS200; Fingerprint Acquisition; μC/OS-Ⅱ; ARM615 目 录 摘 要 I Abstract II 第一章 引 言 1 1.1 指纹识别技术概述 1 1.2 课题研究的目的和意义 2 1.3 指纹采集发展历史及研究现状 3 1.3论文的主要内容 4 第二章 指纹采集系统总体设计 5 2.1 指纹采集系统方案分析 5 2.2 系统总体设计 7 2.2.1 设计思想 7 2.2.2 硬件设计 7 2.2.3 软件设计 8 2.3 指纹识别原理 8 2.4 指纹采集技术概述 9 2.5 本章小结 12 第三章 指纹采集系统硬件设计 13 3.1 指纹传感器与处理器接口设计 13 3.1.1 FPS200的结构与性能 14 3.1.2 FPS200输出模式选择 17 3.1.3 FPS200与处理器接口电路设计 18 3.2 ARM处理器及外围接口电路设计 19 3.2.1 LM3S615芯片 19 3.2.2 电源电路设计 20 3.2.3 JTAG电路设计 21 3.3 UART通信接口电路设计 22 3.4 本章小结 23