基于嵌入式Linux的A/D转换设备驱动设计  

Design of A/D Device Driver Based on Embedded Linux

作　　者：王济生[1] 刘国锦[2] 时斌[2] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏省南京市210097 [2]南京师范大学分析测试中心,江苏省南京市210097

出　　处：《信息化研究》2009年第5期29-31,共3页INFORMATIZATION RESEARCH

摘　　要：为了满足高精度、高速度的A/D转换应用需求,可以在嵌入式Linux系统中使用ADS7844作为A/D转换器。简述了12位串行A/D转换器ADS7844的结构和工作原理,并且以S3C2410为例介绍嵌入式微处理器外接A/D转换器(ADS7844)硬件电路及其在Linux2.6内核中驱动程序的设计。结果表明ADS7844设备驱动能很好地实现数据采集,并且具有很高的稳定性,ADS7844进行A/D转换速度非常快,精度也很高,达到了设计要求。To meet the application requirements of high-precision and high-speed, ADS7844 could be used as ADC device in embedded Linux system. This paper introduces the framework and principle of ADS7844, which is a 12-bit serial A/D converter, and analyses the circuit and linux device driver of A/D converter （ADS7844） based on ARM chip S3C2410. The implementation indicates that the driver supports A/ D conversion very well and steadily. The speed of A/D conversion by ADS7844 is extremely fast, and the precision is also very high. As the result, the design requirement are satisfied.

关 键 词：A/D转换 嵌入式 LINUX AD7844 

分 类 号：TP316.81[自动化与计算机技术—计算机软件与理论] TP273[自动化与计算机技术—计算机科学与技术]