The Design Of Front End For High Speed Portable Data Acquisition System Based On ARM9 And FPGA

Data Acquisition is the basic measure for accessing information. As an important branch of information sciences, it bases on sensor, signal measuring, processing, and computer technology. It mainly concerns with data collection, data store, data processing and control. As said, it is a practicality technology.In this thesis, a design philosophy of high speed data acquisition system is brought forward. This high speed data acquisition system includes computer and data acquisition front. This thesis introduces the design and implement of the portable high speed front for the data acquisition system based on ARM9 and FPGA. The main functions of this front are converting two channels of analog signal into digital signal (many kinds of frequencies can be selected), displaying static waveform and providing high speed data transporting interface to computer.The hardware of this design uses S3C2410 as the main controller, which is based on ARM920T core and produced by Sumsung. Because translation speed of data is very high, FPGA EP2C8Q208 is used as data collection's direct controller, which is produced by Altera.A/D conversion chips are LTC2245, which has 14 bits width and 10Msps conversion speed. IEEE1394a bus is used to communicate with computer.Firstly this thesis introduces the history and status quo of the data acquisition, then brings forward a design program of data acquisition system which includes the front based on ARM9 and FPGA and computer. After that it also introduces the overall structure of this design and provides the detailed hardware design. On the base of that the software system based on ARM9's bare machine is completed, which includes many kinds of peripherals'drivers and application software. The connector time sequence and control logic implemented by FPGA and described by VHDL are also completed.