用C语言编写的GSM-SIM驱动程序包，包含目前常用的GSM短消的发送以及GPRS的实现，针对各个GSM模块编写不同的驱动程序。-Using C language GSM-SIM driver package, including the currently used GSM short of sending as well as the elimination of the achievement of GPRS, GSM module prepared for each different