Design And Implementation Of Car Audio Software Based On Bluetooth Communication

Because motorists continuously pursue elegance and the high quality of professional car audio sound which likes sitting in the luxurious hall, with the increasing popularity of cars, the distributors and service providers are dedicated to the superior service which is to provide perfect scheme of the car audio optimization aiming to every motorists getting the highest new enjoy of seeing and hearing when they are driving. Car audio separating from other vehicle products has formed a technical service industry owing its own characteristic.. The Bluetooth using FH and TDMA technology and realizing the IEEE802.15 standards, works in the 2.4 GHz frequency band. Thanks to the advantages such as small size and low power consumption of Bluetooth, it can easily come true to integrate it into almost any digital equipment. The application field of Bluetooth is very wide, which is used a lot in many types of equipment including mobile phone, PDA, notebook computers, printers, digital cameras and other products nowadays. With the application of Bluetooth technology being in audio and video transmission system, a kind of Bluetooth audio streaming player which is used to enhance the entertainment experience has been gradually applied in vehicle-mounted entertainment system. And as the development of automobile industry, the security and convenience of automobile has been paid more attention. Bluetooth system has been widely used in the automotive sector due to the two aspects coming true promoted by the advances of Bluetooth technology.This paper proposes a software layer design method which is based on the Bluetooth protocol stack. This method is more flexible and more expansible than the traditional software design method, which is very suitable for software upgrading and maintenance. Then based on software layer design method and using C language code, we design to realize the function such as hands-free, function setting, mobile phone music playing and so on. The article explores all levels characteristics of the Bluetooth module, optimizing and downsizing the two layers of classic structure, to complete the overall function of car audio Bluetooth module and the design of the process. The Bluetooth system is mainly formed by the input control layer, the application layer and the hardware control layer. During the implementation of all the levels of the Bluetooth module, this paper has always adhered to the design idea that is the Modularization of Software Function and the Layering of the Software Module, using the design method based on the Bluetooth protocol stack and using the traditional method of mode migration and the improvement of engine mechanism to practice the design idea of Modularization and layering. The core of this paper puts forward to a system framework of three levels to provide good solution for the application and development of Bluetooth in car audio software. Based on the functional requirements of the three levels frame structure with audio software, and according to the characteristics of the Bluetooth instructions agreement, we design the system. This article first introduces the general framework of the system and then it is introduced according to the level of the division. In conclusion, debugging based on the total structure of the system, the experimental results show the design requirements conformed to the actual requirements which has good stability and reliability.