The Remotely Upgrade Of LED Display Based On The Wireless Network

With the rapid development of social networking, a wireless communication network layer of things, one of the major means of communication in the community has become the most major means of communication. Faced with a variety of wireless communication, select a category applied to an appropriate wireless network products also extraordinarily important. Dot Matrix LED electronic display is a combination of computer technology, large-scale display systems microelectronic technology, information processing technology. It has many advantages, not only bright colors, and stable, longer life expectancy, it has gradually become the first choice for many media outdoor work. From the 1980s to the present, related technologies and industries have made progress by leaps and bounds, and now has become an important media publishing equipment. In order to meet the software update flaw, easy routine maintenance, remote software upgrade feature is an essential part.In the embedded world, the original burner through programmed into the microcontroller, but in practical application, the staff in order to complete an online upgrade, the software is done through the serial port. But from the structure, power and other aspects to consider, if an SCM application has occupied most of the memory space, you want to re-open the temporary space to store upgrade program has been difficult to achieve, so this paper proposes a possible software upgrade, the upgrade to be completed, has some real value.In this paper, it takes the design of the LED display as background, to resolve remotely upgrade software of the LED display and provide convenience for the purpose, the problems encountered in the actual test experiment, described in detail the idea to upgrade systems and processes. The first chapter introduces the research background, significance and work. Second chapter details the various types of wireless networks and standards, analyzes the development prospects of the wireless network, advantages and disadvantages of various types of wireless networks, select the appropriate wireless communication. After introduces the basic principles of the online upgrade, including Bootloader, Flash memory, microcontroller upgrade file formats, and so on. The third chapter describes two communication ZIGBEE and GPRS, ZIGBEE communications network built and tested. Complete server via GPRS DTU module-to-client communication.The fourth chapter describes the line programmable function Bootloader and Flash memory, analyzes the current mainstream software upgrade implementation, based on Freescale 8-bit microcontroller, using specific design model for software upgrades.This article provides an online update system based on wireless network. And it played a certain help to the daily maintenance upgrade for LED display of outdoor areas.