Hardware Design Of Andriod Oscilloscope Based On S5PV210

With the continuous development of technology, all kinds of electronicproducts are more and more designed on miniaturization and precision, thefrequency of electronic signal is more and more high, and then, the signalintegrity is more and more influential for electronic equipment to work normally.As signal measurement necessities, the range of application for the oscilloscopeis not limited to the laboratory, while the desktop oscilloscope is not suitable forexterior tasks of the engineers because of the limited volume, and so we need themini hand-held oscilloscopes.At the same time, the functions of the traditional oscilloscopes on signalmeasurement are not enough and can not satisfy the needs of the engineers. Onlymore digital, more intelligent and more multi-functional oscilloscopes canbe preferred by engineers. In addition to signal measurement, the functions ontesting data storage, data analysis comparison, data modeling, remote datainteraction and cloud computing and so on are the development direction foroscilloscopes. As open operation system with powerful functions and easy todevelopment, Android system is suitable for the requirements of a multi-functionoscilloscope software.This project aims to design a Android portable digital oscilloscope, the mainjob of this paper is the hardware design of the oscilloscope. The main content ofthe paper is divided into two parts:(1) The hardware design of Android core board. In this design, Android coreboard adopts the Samsung’s chip named S5PV210as the core processor whichhas basic frequency up to1GHz. we use1GB DDR2memory and256MBFLASH for constituting the minimum system to provide powerful hardwareprocessing capacity for the whole system. The core plate adopts the7inchesLCD liquid crystal display, and uses the capacitive touch screen. The core boardalso provides many interfaces like USB ports, serial ports, Ethernet port, SDIOports and others which can be combined with various peripherals to realizefunction expansion.(2) The hardware design of the data acquisition board and the Logic designof the FPGA. In the design, we use a FPGA named EP3C16F256from thecompany-ALTERA as the core FPGA of the data acquisition board, and useAD9286as the A/D converter. The external waveform which is imported into theoscilloscope is processed by digital attenuation, differential amplifier, AD sampling and so on, finally is inputed into the FPGA as a digital signal form.Based on the logic design of FPGA, we complete the functions of data sampling,caching, controlling trigger channels configuring peripheral devices and so on.