嵌入式Linux下AD7714与SPI接口及驱动的实现

摘要

SPI总线是一种同步串行外设接口,因其结构简单、传输高效等优点得到广泛应用.以三星ARM9微处理器S3C2440与嵌入式操作系统Linux2.6为开发平台,详细分析了基于SPI的模数转换芯片AD7714的驱动程序开发过程以及编译和加载过程,并将该驱动用于差示扫描量热仪,测试结果表明该驱动运行正常,采样结果准确.%The SPI bus is a sort of synchronized serial peripheral interface,it is widely used for its simple slructrue and efficient transmission. Based on the platform of ARM9 microprocessor 53C2440 and embedded operation system Linux2. 6, this paper detailed analyzed the Linux device driver development, compile and insmod of AD7714 based on SPI. This driver is used in the project of differential acanning calorimeter, the test result shows the driver works normal and the sample result is accurate.