Image Capture And Display System Of Windows CE-Based

The large data of the real-time image which is collected and displayed on the operating system has wide applicable prospect in many fields such as monitoring, identification and multi-media.The data transmission distance by usb interface is short, it is easily influenced by environmental factors. Compared with usb interface, ITU-R BT.601 video interface has longer transmission distance, independent synchronism lines reduce the data transmission stability. ITU-R BT.656 video interface embeds the synchronism signals into the stream of images data, and it improves the stability of the data transmission.On S3C2440 which is an ARM processor made by SAMSUNG and Windows CE 5.0 system, this paper use SPI to configure external DSP processor called BF561, GPIO module to analogⅡC interface sequence and configure external images collection processor called ADV7180, CAMIF module which used to be a high speed transmission interface collect ITU-R BT.656 video interface images data, LCDCDMA and DirectShow interface which is supported by Windows CE 5.0 show the collected images directly.This paper research ITU-R BT.601 and ITU-R BT.656 video interface, the theory of CAMIF module which is a peripheral device in S3C2440 processor to realize receive and deal with the images,ⅡC interface sequence, the theory of SPI communication, the interrupt configuration of S3C2440, the theory of show directly and DirectShow in Windows CE 5.0, the register of DirectShow and the compiling and runtime environment configuration, the data transmission theory of DirectShow interface, memory and hardware device management, the theory of stream driver and static interrupt, the communication theory between S3C2440 and BF561, the structure, difficulty of transplant, the theory of program, the compiling and runtime environment configuration, the approach of debug the kernel, the multithreading environment, theory of interrupt.This paper's work is Windows CE 5.0 system transplant on S3C2440 platform, drivers development and test. The Windows CE 5.0 system which is transplanted has many function contain that the big size of images receive which are enlarged by CAMIF module, touch plane calibration after system is activated, default surface which supports Chinese language input, DirectShow interface core, the display component, storage card,usb interface,touch plane,uart drivers, SPI and CAMIF interrupt handle in OAL layer, SPI,CAMIF and GPIO stream drivers, the images players which support show directly and DirectShow interface independently, the DirectShow component which support CAMIF driver. This paper test the CAMIF clippig,zoom and rotate functions, Windows CE 5.0 kernel interrupt response time, real-time properties of CAMIF receive images, the communication's highest speed that GPIO analog IIC video interface.