基于B/S结构的读卡器驱动的研究

提出了一种基于B/S结构读卡器驱动的软件模型，该驱动模型是基于B/S驱动开发模式的，较基于C/S驱动开发模式具有可维护性高、可扩充性好等优点.首先给出了基于B/S结构读卡器驱动的软件模型；其次介绍了读卡器驱动的工作原理，分析了主机和读卡器通信中错误问题，并对出现的错误进行了有效地解决；最后对读磁道信息不稳定问题进行了研究，引入多线程处理机制来优化驱动程序.这样做的好处是在读卡器执行命令的过程中，可以再次发送命令来取消上次命令的执行，提高了程序执行的效率.

Research of card-reader driver program based on the B/S structure

Card-reader driver software model based on the B/S structure has been proposed.The model has advantages of high maintainability and expansibility compared with the C/S pattern.The working principle of card-reader driver was introduced,and the communication problem between the computer and card-reader was analyzed and resolved.Multithreading technology has been adopted to optimize the driver for solving the problem of reading tracks information unsteadiness.The advantage of using this method is that card-reader can give another commend to cancel execution of the last commend in the process of card-reader running command,improving the efficiency of running program.