Digital Signage Information Release System Based On Sim5320a Wireless Module Terminal Design

Wireless communication is the mainstream direction of the development of communication technology. Nowadays, more and more electronic products integrate the3G WCDMA communication functions. Owing to the high cost of getting started with onboard the WCDMA chip and the long time of development cycles, using WCDMA wireless module to achieve wireless communication become a better choice. In the real-time Operating system for embedded μc/os, this article selects the SIMCom’s WCDMA/HSPDA SIM5302A module, combining with the USB interface which is easy to use, supporting high-speed and other characteristics to realize the method of controlling WCDMA wireless module communicating with the server. Analyzing the USB protocol, HTTP communication protocol and the AT command and contrarying to WCDMA wireless module’s USB interface application, on the one hand, the driver of the USB interface is completed in the driver layer and Operation module USB interface API interface functions are provided to the application layer. On the other hand, terminal can control AT command to communicate with the server at the application layer, pictures and videos are downloaded. The paper depicts the system of hardware design and software design, and3G WCDMA wireless communication module applying in embedded terminal products from the point of function and software design. At last the advantages of using the wireless communication module (USB interface) are summarized in this system.The paper researches the embedded wireless communication development platform based on ARM-μc/os, accomplishes part of the hardware and software design, realizes the SIM5320A wireless module communicating with the server normally, at the same time, providing a shortcut for the future development of applications based on this platform.