AD7994与S3C2440的ⅡC接口及Linux下驱动程序的设计

The Design of the ⅡC Interface between AD7994 and S3C2440 and the Driver under Linux

IIC作为目前通用的总线技术,由于它的接线简单,传输速度快,已广泛应用在时钟、EEPROM、小型LCD等设备与CPU的接口中。通过把AD7994与S3C2440的IIC接口相连,并编写相应的Linux驱动程序,使得AD7994可以在S3C2440下正常工作。阐述了嵌入式下如何连接具有IIC接口的外围设备,并详细论述了Linux下IIC设备驱动程序的编写及应用过程。

Being as a common bus technology, IIC has been widely used in real-time clock, EEPROM, small LCD and other devices and the CPU interface because of its simple wiring and rapid transmission speed. Connecting the AD7994 with S3C2440＇s IIC interface and writing the corresponding 1Linux driver can make AD7994 normally work under the S3C2440. This paper expounds how to connect peripheral devices with IIC interface under embedded system, and discusses in detail the writing and applying process of IIC device drivers under Linux.