Embedded Data Acquisition And Processing System Based On ARM

With deep-going development of computer, network and micro-electronics technologies, as well as design of SoC and development of embedded OS, embedded system is increasingly widely used in industrial control equipment, mobile communication device, household appliance and consuming electronics, etc.As an application of data acquisition and processing, embedded system is researched in this thesis, hardware and software is designed, debugged and implemented with structured and modularized scheme. A universal testing platform is developed, integrating embedded control, fast data acquisition and processing and friendly human machine interactive interface.Hardware circuit for data acquisition is designed based on QT2410 develop board with ARM9 microprocessor S3C2410X at the core, including 8-channel analog input and 16-bit digital I/O channel. Programme modules including timing and continuous acquisition of AD7892, digital I/O, LCD display and touch screen control are designed with ADS, as well as simple processing and FFT. Experimental result shows that the sampling rate of AD7892 can reach upwards of 100 kSPS, being real time to some extent.By virtue of embedded Linux transplanted to ARM, device drivers and applications for GPIO, key, LCD module and data acquisition circuits are developed. The last part of this thesis introduces the transplant and development of MiniGUI, and graphics programme is designed for data acquisition and processing, real-time display of waveform. Practice has proved that MiniGUI is extremely efficient, stable, lightweight and friendly with high reliability.Embedded data acquisition and processing system based on ARM has well-defined architecture, good universality and extensibility. It could provide an integrated hardware and software solution for various embedded applications. Also, it has a wide application prospect in the field of industrial measurement and control.