Studying On The Control System For DDS AWG Based On ARM

As a basic electronic equipment, signal generators are used widely in both teaching and research area, or in engineering technical support. Carrying on study deeply in signal generating from theory to technology has a positive meaning either in terms of teaching and research perspective, or from the engineering point of view of security services. With the continuous progress in computer technology and microelectronics technology, arbitrary waveform generator (AWG), which is a new type of signal generator, was invented. Direct Digital Synthesis (DDS) is a new method of frequency synthesis, which is a revolution in the field of frequency synthesis. With the development of digital intergrated circuits'technology and microelectronic technology, direct digital frequency synthesis technology is increasingly revealing its advantages. Arbitrary wavefrom generator on a basis of DDS technology has a series of particular virtues, including stable and accurate frequency of output, high quality waveform and wide bandwidth, which is an important research direction of AWG.This paper mainly carryed on design and studying for the development of man-machine control systerm for AWG. Firstly the thesis describes several aspects of DDS in tetail. It concerned basic theory, primary architecture, main features, etc. Also, it makes a summary of development status quo of AWG. According to the research result above, the hardware and software design plan of the DDS AWG man-machine control system are set up.Paper finished design of schematic hardware circuits, design of man-machine operating windows, and software development of ARM control system of AWG, which provided a feasible realization for mam-machine system of DDS AWG. For hardware, system used a high-end 32-bit embedded microprocessor as the main controller, and used TFT color LCD, whose resolution was 320x240, to display man-machine operating windows. For software, paper built up a man-machine control system for AWG. It was easy to operate, and was equipped with elaborate illumination. It could use Chinese and English languages also. Besides, paper developed a serial communication interface, which allowed upper terminal to control AWG, and to download arbitrary waveform data to AWG.At last, aimed at problem being emerged during system debugging stage, the paper optimized system codes, which further enhanced the performance of the AWG man-machine control system.