Design of real-time clock based on ARM embedded system

Lijuan Liao

College of Computer Science and Technology, TaiyuanUniversity of Technology, 030024, China

Real-time clock of ARM processor has disadvantages such as dependence on the processor, low interrupt level and unadjustable accuracy. Linux embedded system based on ARM processor is provided with independent real-time clock using X1227 real-time clock chip. In addition, the work presents transplant of uCLinux system in S3C2440A, procedure of system boot loader and frame of Linux character device driver, thus achieving design of RTC driver based on I2C protocol of uCLinux system.