Fingerprint Acquisition System Hardware And Software Design Of The Usb Interface

Identification based on the human fingerprint is an important research direction in pattern recognition field. The acquisition and transfer of the fingerprint image have a serious effect on the fingerprint recognition system .As an interface of the PC ,USB has many excellent characteristics: connect conveniently, not need locate and install program, not need shut down and restart PC when plugged in; real plug and play; high speed( USB1.1 protocol has 12Mb/s speed); not need hardware resource, no hardware conflict, auto test and configure.The process of the hardware circuit design, the firmware program and driver develop of the fingerprint recognition system is described in detail based on the USB 1.1 protocol in the paper. To match timing requirement of the acquisition and USB transfer speed, and to simplify hardware design, EDA and CPLD technology are used in the paper.