DSP Automatic Fingerprint Identification System Hardware Platform-based Design

In the modern age, wherever you are, people will encounter the situations which need your identifications. However, traditional identification techniques based on symbol gradually behave ability not equal to there ambition because of the threaten of fabricating certifications and cracking code. Since, identification techniques based on biological characteristics, especially the fingerprint identification technology, have been developed quickly. One of the applications of fingerprint verification is to make auto fingerprint identification system (AFIS). In this thesis, a hardware platform of this kind of system is established, which consists of six modules, that is, Management Portion (including C6711B DSP and memories), Input Channel (used to collect fingerprint image), Output Channel (USB interface), Human-Machine Communicating Equipment (LCD and keyboard), Debugger Interface (JTAG), Power Manager and Supervisor Circuit. The basic function such as registering of fingerprint and matching is completed independently. An embedded Versatile Real-Time Executive (VRTX) is developed in this system by using DSP/BIOS^TM provided by TI. Scheduling of tasks, transferring of semaphores and processing of soft/hard interrupts is completed so that these can improve reliability of system, reduce cost greatly and shorten the period of development. The arithmetic of fingerprint identification and its hardware system is depicted briefly in the first two chapters of this thesis. In the third chapter, the detail architecture of the platform as well as the solutions of all the six modules in hardware and software is discussed. Additionally, some experiences during debugging are expressed. Moreover, how to eliminate reflect and crosstalk, ensure the integrity of signal in high-speed digital circuit designing is expatiated. In the fourth chapter, how to develop an embedded Versatile Real-Time Executive by using DSP/BIOS^TM, and how to solidify codes in this system is expatiated. While, some problems the author has encountered during debugging and some application notes about DSP/BIOS^TM are offered in this thesis. Moreover, some API (Application Programming Interfaces) functions are used so that shorten development period. In the end, the future work is described briefly.