摘 要随着科学技术的进展，人们的安全意识也越来越强，因为指纹具有唯一性和终生不变性，所以指纹识别成为代替传统身份识别最安全、可靠的方法之一。本设计基于飞思卡尔 Kinetis K60N512 系列单片机，指纹识别模块选择的是杭州城章科技的 R305F 模块，该模块带有高性能的 DSP 芯片，该 DSP 芯片内嵌完整的指纹识别算法和协议，具有指纹采集，指纹比对，指纹搜索和存储等功能。模块与单片机通过串口进行通讯。指纹识别系统通过 CH340G 芯片实现 TTL 电平向 RS-232 电平的转换，进而实现与 PC 机的交互，PC 机端经上位机显示指纹识别的结果。论文中介绍了基本算法的实现流程，同时介绍了 K60N512 芯片看门狗模块的基本原理以及启动流程等。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AbstractWith the development of science and technology, people's 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.Re...
