Design And Implementation Of Camera Module In Android System

With the rapid development of mobile internet, more people start to use smart phones. In all of these operating systems for smart phone, android system, with google's supports and its open source characteristic, has been supported by various companies. Camera equipment as an essential component of smart phone, has become an important part of people's attention. About camera, android system provides better interfaces for camera applications in upper layer. But in android HAL layer and linux driver layer, there is no standard framework for camera module. As a result, this paper, developing and porting an android camera module in a development board as the background, introduces the development environment of android system and the porting of android, deeply analyzes and researches the HAL layer, camera controller driver and camera sensor driver, summarizes the working principle and working flow of camera module in android system, and realizes the HAL layer and linux driver layer of the camera module in a development board based on V4L2 standard and regular character device model.