The Soft Core Technology Research Of The FPGA Embedded Nios-Ⅱ

FPGA embedded Nios-II softcore is developed on the basis of traditional hardcore,which has the characteristics of low costs,high flexibility,short production cycle etc and are widely used in the intelligent electronic products,medical devices,wireless communication industry,therefore,the technology of FPGA embedded Nios-II soft core gradually becomes a hot social concern.This paper studies the research performance and application of FPGA based soft core embedded Nios-II.Firstly, this paper introduces the structure, characteristics of embedded systems.Then,this paper focus on the design of hardware and software. In the hardware part, the main work includes research the hardware circuit module of development board and design the circuit of analog channel plate.The main work of software design includes soft core design and driver writing Soft core design which is designed in Quartus-II software development tools in the SOPC;Driver writing program, mainly by the development and design of the software in the IDE, program is downloaded to the development board to debug and run, through the ADC sampling data and the data is displayed through the digital and LCD,comparing with the voltage setpoint and the measured value to analysis data error.Finally, soft-core technology embedded FPGA can customize the required peripheral interfaces according to the actual needs, flexibly Introducing emulator debug mode, you can query register and variable real-time, changing the past inconvenient situation only to debug FPGA simulation and test port.By verifying the design,it can meet the precision of ADC sampling error, the precision of PWM duty ratio, the speed of interrupt response and conduct normal communications.