The Design Of GPRS Data Terminal Based On Embedded Linux

With the rapidly developing of the embedded and wireless communication technology, data terminals that depend on the wireless data transmission network and based on the platform of embedded systems, have been more widely used. Remote Data collection also has been developed to use wireless communications network to achieve real-time data transmission. The paper makes the research and design based on ARM's intelligent data terminals in the background of this thesis. The terminal can collect the information of the end-user data equipment, utilize a wireless communication module connecting the wireless data terminals to mobile network, Will be able to use mobile phones and wireless data terminals for communications conveniently. The advantage of this method is that either the wireless terminals send messages to the administer with the collected data information or warning information, or the administer issue an order to implement wireless data terminals long-distance control. Considering some systems require a smaller amount of the data transmission, the paper chooses the SMS as a carrier, develops the wireless data terminal systems based on the embedded and GPRS.In this paper, the design of wireless data terminal system is based on the S3C2410 processor, use the embedded ARM Linux-2.4.18 as the operating system. It uses the Feynman Company's MiniGUI as graphics application software, and uses the BenQ Company's GPRS module M22 as wireless communications module. The implement of the system including the building of the terminal hardware platform, the design of data collection with ARM, the establishment of the software development environment, the design of embedded Linux system, as well as the realization of software applications program. In the above-mentioned hardware and software platform for the Linux system used by the serial and BenQ M22 communication module features, using C programming designed to achieve this task the serial driver, made available to the application layer in order to achieve the lowest serial communication and the operation interface of module is called. On this basis, the GPRS module initialization, application design, to achieve as well as the interface to send and receive SMS text messages codec, reasonable and effective use of AT commands and gave control to send and receive text messages.