Title:
PORTABLE DATA ACQUISITION SYSTEM DESIGN BASED ON
USB
Major：Circuits and systems
Name： WenHua He Signature:
Supervisor：Prof. ShuiYu WANG Signature:
Abstract
Traditional data acquisition card is commonly used standard interfaces such as PCI
、
ISA
，
but the acquisition card is not easy to carry, install and expand. So it can not meet the actual
needs of the research and production.The Universal Serial interfaces USB as a new standard of
serial communication, it has a high transmission rate, good scalability .At the same time,it is
easy to plug and play, variety in use. So it is compensated for the defects of traditional capture
card interface.
In this paper, along with the efficient performance of the transmission advantage of the
USB and FPGA, a portable data acquisition system based on USB2.0 have designed and
implemented .The paper first briefly describes the architecture and features of the USB bus,
then conducted in-depth discussion on aspects of the hardware circuit, software programs, and
system testing.
In the Hardware
：
We mainly completed AD converter circuit design, FPGA host
controller peripheral circuit design,the USB interface circuit design and the power module
design. The connection between each part of the chip operating modes and systems to achieve
the function. Complete system schematic design and PCB diagram of the hardware circuit
system,
In the software
：
According to the design requirements, we focus on the three sections: the
FPGA control-program design, USB firmware design and client application program design.At
the time,describeing in detail the various parts of the software design ideas.We also give the
corresponding program flowchart and debugging results.
At last ,combination of hardware and software , testing the entire systemis was tested and
