摘要
本文介绍了GPRS模块从上电到连接到网络的一般过程及其相应AT指令,以ATMega128单片机作为DTU的控制器,GPRS模块采用华为GTM900C。重点介绍了在不嵌入操作系统情况下的DTU应用软件实现过程,主要包括:DTU的AT模式、命令模式及透传模式三种数据传输方式的具体实现方法,串口数据处理方法,其他一些DTU基本功能的实现方法。
The general process of connection to the network by GPRS module and its corresponding AT command are described in this paper.ATMega128 MCU is put as the controller of DTU,and GPRS module uses GTM900C made by Huawei.The paper focuses on the implementation process of DTU application software without embedded operating system.The main content cover three data transfer modes including AT mode,command mode and transparent mode.It also presents data processing method of serial port and some other implement methods of DTU basic function.
出处
《仪器仪表用户》
2013年第5期87-89,共3页
Instrumentation
