This paper introduces the general principle of fingerprint recognition, and elaborates on the module structure and function of CPU S3C2440A and HB7121B; and gives the connection between S3C2440A and fingerprint reader HB7121B, completing the hardware design of fingerprint reader. At the same time, the embedding of Linux operating system and the writing of application software are discussed, and the software design of fingerprint reader is completed. This design introduces ARM9 technology into the field of fingerprint recognition, which will promote the application of ARM technology and the development of fingerprint recognition.
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