A Linear-CCD Dataacquisition System Based On AT91RM9200

Linear-CCD image sensor is widely applied in many areas, includingindustry, military and civilian use, etc. The information of video images aresampled fleetly, saved and processed, which adopts both the technique of theembedded system and linear-CCD, is an important way of linear-CCD dataacquisition.There are many differences among linear-CCD driving circuits of differentfactories and brands, and finished linear-CCD driving circuit is too expensive,which brings too much inconvenience to the CCD user, so in this dissertation Idesign linear-CCD driving circuit with CPLD(Complicated Programmed LogicDevice), which can produce linear-CCD driving pulses fleetlyand expediently.High precision and portable application is a problem which is the mostimportant in this dissertation. Due to that, using the AT91RM9200 as the coreprocessor, a kind of real-time data acquisition system based on 32bits embeddedARM processor is put forward. ARM9TDMI is a RISC processor core with higheffectiveness and low power waste. AT91RM9200 adopts ARM9TDMI as itskernel is a micro controller with high-performance, cost-effective. Therefore,AT91RM9200 is especiallyfit for embedded products.The system comprises three parts: The CCD driving module with CPLD asthe core is the first part. Programming the CPLD is to produce CCD drivingpulses and synchronized communication signals. The analog to digital modulewith A/D converter as the core is the second part. After preprocessing, the outputvideo signals are transmitted into 12-bit digital data. The data processing modulewith ARM processor as the core is the third part, which processes the CCD videosignals.The focus of this dissertation research is to develop the hardware of thewhole system, and at the base that the debug process of the unit circuit isintroduced in proper sequence, I compile and simulating the system operationsoftware.Then the experiment results are analyzed and presented.