这是用Red Hat9.0的交叉编译器编程，在32位ARM920T核的高速ARM 处理器AT91RM9200 以及其他外围扩展电路的开发板上实现的一个简单的计算功能，主要目的是给初学者提供借鉴。-This is the Red Hat9.0 with the cross compiler programming, in 32-bit ARM920T core high-speed ARM processor, as well as other external AT91RM9200 development board to expand the circuit to achieve a simple calculation of functions, the main purpose is to provide reference for beginners .