基于DSP和USB的图像采集系统的研究/Researching of image sampling system based on DSP and USB
Image processing system has been widely used in many very important situations in modern society. The image processing system we used nowadays are mainly based on image processing card,which has to turn to the high computing speed and large memory capacity of computer to accomplish the work related to image processing. This way is very simple,but then the shortcomings such as bulky ,expensive and unstable to the designed system are also coming along. To avoid these disadvantages, we put forward a complete "embedded" image processing system in the thesis. This image processing system is based on DSP, which can accomplish some work such as image sampling，converting，processing and displaying without computer. This is a complete "embedded" system.
The core device of this "embedded" image processing system is a high performance fixed-point digital signal processor (DSP) produced by TI corporation-TMS320C6711,which has so powerful hard structure and variable tough function instructions ,along with its super computing speed of 1600MIPS that it can realize the complete "embedded". According to the features of image processing, we have applied some peripherals such as A/D converter, First In First Out RAM, Synchronous Dynamic RAM,FLASH ROM and USB master/slave interface so on in this system in order to achieve our goals of image sampling ,processing and displaying,which can isolate this image processing system from others ,and realize the completely "embedded".The design includes two parts:The hardware and software.each part go into particulars.
The paper mainly concerns about:
(1)The hardware project selection of the image sampling and transmission system.
(2) The hardware design of the image sampling and transmission system. Including the selection of chips, image sampling, design of expanded Memory, USB interface design.
(3) Design of the system driver, including the software of USB’driver in Windows. and USB master control programming by DSP,
(4) Design of software including USB firmware,application program interface in WINDOWS and data sampling processing in DSP.