Design And Implementation Of Portable B-Mode Ultrasonic Device's Human-Machine Interface Based On Nios Ⅱ And FPGA

In China, the expenditure in medical & health has become the third largest after food and education spending. However, the overall size of this industry only account for less than 2% of gross domestic product. With further rapid promotion on the health needs of residents, the health construction of communities and other factors, portable medical electronics market in China still maintains a high level of growth. The research and development on Portable B-mode ultrasound device must make a great contribution to the development of China's medical industry.This article describes how to construct a SOPC system for Portable B-mode ultrasound device with the rapid development on FPGA and Nios II technologies, and how to develop its interactive system's software on that basis. The aim is to enable future products based on SOPC system to meet the higher demand about cost, size, scope and other aspects.In the traditional development of portable B-mode ultrasound device, the core of its system structure is "external processor+FPGA". Its main drawbacks are, its system is very complex; it is difficult to develop system's hardware and software; and the communication between the microprocessor system and the FPGA system is not conducive to the transmission of large amounts of data. On those bases, this paper proposes to make use of the FPGA-and-Nios-Ⅱ-based SOPC technology, using Nios II soft core processor provided by Altera to perform the traditional functions achieved by an external microprocessor, that is to define and configure the right Nios II core and its processor system, and download this system to the FPGA chip which resides on the development board, resulting in the formation of the system's hardware logic, thereby achieve the purpose that a single FPGA chip is truly regarded as a control center of the whole system.The experimental part of this thesis is completed on the test box. First, we compare the current SOPC technologies widely used on today's market, and on this basis propose a kind of SOPC technology program which is based on the IP soft core. We also study several soft-core processors which are the more popular on the market, and combined with the current level of technology and material, we put forward using Nios II soft core processor to build a SOPC system. Secondly, after the requirements analysis on the total hardware and software systems has been done, we develop the hardware and software systems in accordance with them, then compile and change the hardware and software systems respectively until they both are successful, and finally download them to the FPGA on the test box to do practical exercises and to check if the system works. And we get the desired experimental results.