Driver Design Of Transportation Card Based On Linux

Most of the city’s buses have been used electronic ticket with RFID technology, an electronic ticket that generally adopts the non-contact IC card, which has the advantages of convenient use, high safety, and secure payment. Microprocessor of card reader was51single chip or STM32,which could not be supported by the operating system. Therefore, the data to transport server need use the USB or serial port, an complex operation that can not meet the needs of public transit system.This paper analyzes the development status of bus card reader, introduce the principle and application scope of RFID particularly and studies the communication protocol between the card reader and IC card. What’s more, this paper puts forward to high frequency processor bus card reader that uses S3C6410as the core CPU, takes FM1702as card reading module, and writes Mifarel S50card.Through the M534chip to control the PSAM card, the high frequency processor bus card reader uses CH452to display the module chip drive LED screen, which is based on the hardware module, loading the Linux2.6.28.6operating system, programming the UBOOT and file system, writing the driver of card and display module, and transplanting the service of SFTP, OPENSSH, Wpasupplicant. Through the wireless WIFI, the staff can manipulate the reader remotely, so that the operation of data transmission is more convenient, simple and fast.Based on the driver design, we can also use multi-programming, taking interaction of reader card and server to realize rich applications. My design has a great value to develop bus transportation...