The Design And Realization Of Display Module Based On The ALPINE Car Audio

In recent years along with automobile industry starting, automobile multimedia technology also becomes vigorous development; the present automobile multimedia mainly concentrates in the aspect of seeing and hearing technology. But the car audio technology becomes maturity; it evolved the electronic vehicles system of comprehensive multimedia from the initial car radio, which has the seeing and hearing entertainment, the communication navigation, assistance driving and many kinds of functions. The car audio brought seeing and hearing effect of higher clarity, more perfect hearing feeling and longer playing. The embedded technology causes the intellectualization, the microminiaturization, multi-purpose of the car audio to become the reality gradually in the car audio domain.The car audio is an automobile appendage, in the premise of automobile normal using, which provides the high grade sound for the user. This is the primary mission of car audio. The car audio system this article elaborated is MN101E16K SCM based on MN101E series SCM which produced by the Panasonic company, uses the advanced data media technology in the world, involves technology areas of digital signal processing and digital sound synthesis, and has the good reliability and the probability.Firstly the paper has carried on the brief introduction to the car audio elementary knowledge as well as the software system, and then in detail elaborated the car audio software system task and the task priority management, as well as software programming realization of the DISPLAY module.The system task management is the core of the entire software, and directly influences product performance and quality. The division of task decided the system whether can run normally, moreover, relates ROM, RAM capacity questions. Core technologies of the embedded operating system Candy OS which is this design used, is based on the present popular RTOS real-time operating system. This also enabled present the car audio software system achieve in a new altitude of the embedded software, used the hardware resources fully in each kind of car audio, formed even more perfect and friendly car audio. Candy OS uses preemptive dispatch law to the different priority task and Time Slice rotates dispatch law to the same priority task.The DISPLAY module is an extremely important part of the car audio, it is directly related with each module, the software and hardware unified, has applied each kind of technology which the development of car audio software...