DDS Double Channel Waveform Generator Based On FPGA

Direct Digital Frequency Synthesis (DDS) was advanced rapidly in early 1970s and has been developing owing to its entirely digital structure. The appearance of Field Programmable Gates Array (FPGA) has changed the design method of digital electronical system and provided a new design model. With the two technologies and the flexible control ability of Micro Controller Unit (MCU), Waveform Generator, has been developed. This dissertation will describe its process and characteristics.The EP1C6Q240C8 of Altera Corporation is chosen to do the main digital processing work, which is based on its large scale and high speed. The AT89C51 MCU of ATMEL Corporation is chosen as a control chip. In this design, how to design the FPGA chip and the interface between the FPGA and the control chip is the difficulty. With the method of software and hardware programming, the design used the software Quartus II and language Verilog-HDL solves it successfully.In this dissertation, the principle of DDS and basis of Electronic Design Automation (EDA) technology is introduced firstly. Then the master chips are introduced. They are the base of the design. The problems met in the design are analyzed and the whole function is partitioned into three parts: master chip, FPGA device and peripheral hardware. The three parts are described in detail independently. The function, performance, realization, and experiment results are introduced in detail through a series of experiments. Finally, the disadvantage and things need to advance are also listed.Through experiments, it is testified that the design meets the requirement planed and the way to use software and hardware programming method and DDS technology to realize double channels Waveform Generator by FPGA is available.