简单的linux 下的uart串口读写测试程序员代码，再rs3 rs4 arm9 下调试通过-simple linux under the uart serial literacy tests programmers code, rs3 rs4 again under debugging through arm9

《arm9嵌入式系统开发与实践》光盘资料，包括uart,DMA,IIC,GPRS驱动程序-" Arm9 embedded system development and practice of" CD-ROM, including the uart, DMA, IIC, GPRS driver

在ARM9等开发板上调试GSM等串口模块的工具，实现最基本的minicom功能，程序本身会为每条命令加上\r，如果不需要，请自己修改程序，无退格功能。-ARM9 development board such as in GSM and other debugging tools for serial modules, minicom to achieve the most basic functions, the process itself for each command with \ r,