Embedded Ccd Camera Acquisition System Based On Arm And Linux Study

Based on the ARM processor and embedded Linux operation system,embedded system technique is used to develope the CCD camera system,which breaks the restriction of distance, minimizes the system capacity andmakes the system intelligent and networking. The system has the activemeaning to expend the application field of CCD camera and enhance theflexibility. The dissertation mainly focused on the following research works:The structure, operating principle and output signals of CCD camera arepresented, and the principle and choosing principle of ARM processor and thecharacteristic of Linux operation system are presented. Base on those aninnovated method to design the sampling system is presented by the ARMprocessor and Linux operation system.The hardware of system is completed by the method of core card andinterface care. The hardware contains ARM core module, communicationmodule, human interface module, logic transition module, power module andcamera interface module. The camera interface module, which is the key pointof system, is designed by the FPGA IC EP1C6T144C8 and the ARM processorS3C2410. Data sampling is completed by the signal service demand modelDMA operation and the data processing module in FPGA, the asynchronousFIFO is the core of data processing module.The design and development of embedded software has been elaboratedin detail. Embedded software consisted of the building of Linuxcross-development environment, the transplant of bootloader and the Linuxkernel, the building of file system, the driver program of camera interface,building method of the Qt/Embedded environment, designing and transplatingthe application in the QT environment and the building of embedded WEBserver.Finally the testing of system is presented. The camera sampling system,the FPGA developing board and the CCD camera designed by the COERI arecombined to tesing the system. The testing contains the measurement of interface, the measurement of driver program of interface and themeasurement of whole system. The results of testing show the camerainterface works stabile and dependable, and the sampling rate is more than4Mb/s, and the interface driver works well, which realizes the control ofcamera interface in Linux. The results also show that the sampling system canrealize the image sampling of CCD camera and realize the combination oflocal display and long distance monitor.