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Design and Implementation of a GPS Vehicle Navigation System Terminal Software

WANG Ming-yan,LIU Xu,ZHANG Qi-shan,WU Jin-pei(School of Electronics and Information Engineering,BeiHang University,Beijing 100083,China)  
The vehicle navigation system was constituted by three parts:navigation and control center,vehicular terminal and GPRS communication network.The hardware of vehicular terminal was based on ARM CPU,and the Operating System was embedded Linux.The terminal software had two parallel threads.And the main function modules included data reading,data processing and voice output modules.The data-reading module read the GPS data from GPS receiver serial port.The data processing module judged whether there was an information point should be output.And the voice output module managed to output unabridged and correct voice information by queuing for the voice.In practice,the software can run well.
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