HCI System Research And Development Based On ARM And DDS

Signal source is extensively used in teaching, scientific research and engineering technical support. From theory to practice, studying on the signal has a positive meaning. Arbitrary waveform generator is a new type of signal source, with the advancement of computer technology and microelectronics technology.Direct digital frequency synthesis is a new method of frequency synthesis, whose invention and wide use is a revolution in the field of frequency synthesis. With the development of digital integrated circuits and microelectronics technology, direct digital frequency synthesis technology increasingly demonstrated its superiority. The arbitrary waveform generator based on DDS technology has a series of unique advantages such as output frequency accuracy, stability, and high-quality output waveform frequency range and so on.Embedded System is a new economic growth point of information industry in the 21st century. It is a breakthrough of the revitalization in China's information industry. Its hardware has a variety of special features, such as small in size, light weight, low cost, low power consumption, high reliability, the use of embedded CPU and so forth. As for its software, small in code size, high efficiency, fast response requirements, able to handle concurrent asynchronous, real-time processing capabilities and so on are its advantages. Controlling DDS signal with ARM microprocessor, can quickly and accurately display various waveform, and realize frequency, phase and scope modulation. With high-performance ARM processor and advanced DDS technology, we can design high-performance multi-functional DDS signal generator.This paper mainly conducted design and research about the development of the interactive system of arbitrary wave signal generator. We completed the hardware and software design of HCI system of DDS arbitrary waveform signal generator. According to the functional requirements of the waveform generator, the system is divided into processor module, memory module, man-machine interface module, communications module and waveform output module in order to achieve the best program of the Waveform Generator Design. Beginning with the process of the development of embedded system, the paper studied in depth the development of the modules of the arbitrary waveform generator interactive system.In the paper, we completed hardware design, software design and the operation module interface design of arbitrary waveform generator HCI system. A 32-bit microprocessor AT91SAM7S256 was used in processor module. HCI module includes a high-resolution 320 by 96 TFT color LCD display, which combined with keyboard to achieve excellent operability. Communication module includes USB and UART. Waveform generation module uses waveform generation plate to output waveform. As for software, we constructed an arbitrary waveform generator HCI system, which is easy to use, detailed on information, and can support mixed demonstration in both English and Chinese.