Design And Implementation Of Vehicle Real Time Communication System Based On Embedded System

In today’s rapid development of science and technology, communicationtechnology will be applied to the vehicle control system, so that people can stay athome to achieve control of the vehicle, which is an inevitable trend. In the future, thevehicle communication system has broad market prospects.The main function of the vehicle real-time communication system is the userremote control vehicle. Completion of the communication between the vehicle andthe user is the basic function of the system in this paper. This system adoptsautomatic SMS way to communicate with users, and connects to the vehicle controlchip via a serial bus network. In order to realize the function of the system, the systemneeds to be divided: the module of communication with the user, the module ofcommunication with the vehicle, master control module, storage module, positioningmodule, etc. The system software is based on the ITRON real-time operating system,and uses the multiple tasks to achieve different function module. The vehiclereal-time communication system needs to be connected to the network of the vehicleelectronic devices through the serial bus. To solve this problem, we designed andimplemented the drivers of serial bus of the vehicle communication system. AT thesame time, in order to realize the function of the system automatically send andreceive messages, this paper adopts the AT command to interact with the GSMmodule, so that the microprocessor control GSM module to send and receivemessages. The system is applied in vehicle, so it needs to ensure real-time. In thispaper, obstructive according to ITRON system design of multi task pollingmechanism of ITRON system, concurrent multi task processing. And system uses theSMS effectiveness discrimination mechanism to check messages. In this paper, weuse MMS to carry the image file for system upgrade. This is a try about multimediaapplication. At the same time, the system upgrade uses the AB upgrade method. Thismethod can keep the system working even the upgrade failed.In this paper, the vehicle real-time communication system has been showed.Through the display, this system is stable and reliable. For the user control commandmessage, the system can make real-time response in20seconds, and the current state of the vehicle will return to the user. When system is in idle state, it can quickly entera low-power mode to save power. This ensures that even if the vehicle does not startfor a long time, the battery will still work inside the vehicle. The structure of thesystem designed in this article is clear, the function is specific, and is in the leadingdomestic level.