IC card device driver module code

The IC card commonly used by the common telephone we have adopted is used as an example, and the entire IC card device driver module is explained by implementing the code. (1) Determination of data structure Edit the header file icdata.h, determine the public data structure applied in the drive module program. The ultimate goal of the drive module is to read and write card data processing, so the standardized data structure is required. You can define a data structure to realize the storage area, data address index, control flag, etc. of the card data, such as: Be In this way in the drive module, only Struct ICDATA ICCDATA is only required; a statement defines all of the card tachill data structures; and IC_FOPS defines the device operation mapping function structure. From this data structure, we implemented an open, read, write, and monitoring function of IC card devices. (2) Hardware interface control line control subunies These functions are used as control of signals such as card reset, clock. Be The above is one of the hardware control interface operation functions for the hardware system platform we developed, and is used to control the reset signal of the IC card. For different hardware platforms, the internal operation method is not the same. Similar other operation functions are: Be (3) Implementation of module initialization functions Be The module initialization function is an essential processing function in the module development process, used to implement the initialization of the device, interrupt initialization, processing, equipment registration, etc. In the above function, first applied initicData (& ICDATA) to implement the initialization of the card data, and then defined queue data. The binding, interrupt application, and interrupt initialization of the interrupt processing function are again performed. Finally, an application for IC card character equipment is realized. The device is named IC. , Reading the full text, the technology area About μClinux transplantation on ARM7 S3C4510B Multi-looped into charge and discharge controller design Interrupt service routines for ARM embedded systems LED dimming engine design based on 8-bit MCU How to display Chinese characters, ASCII characters and color graphics on the LCD monitor

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