Abstract:

The data interfaces of Mobile terminals are not identical,which causes great inconvenience in data exchange.In order to expand the applications of audio interface,a special communication protocol is designed to ensure the reliability of the analog signal transmission.Coding and decoding of digital data are realized based on the embedded system and the control software,which can be downloaded onto cellphones.There are some useful explorations into the thread design,transmission algorithm and agreement on the format.Experiment shows that our design meets the requirement of the synchronization of serial communications.

Key words: audio interface;data transmission;module design;data format