Abstract
Development of embedded data acquisition and displaying system
based on ARM
Zhang Lei
Directed by Prof. Jiang Haihe
With the development of computer technology and after-PC times coming, the
embedded technology plays very important roles in both industrial production and scientific
experiment. On the other hand, Data acquisition is the key procedure in information and
signal processing, and has been applied widely in both war industry and civil. Embedded
system is one of the leading-edge technologies nowadays. It can be used to enhance
real-time feature and flexibility of the system, so as to meet the increasing automate
measurement needs. The study of embedded data acquisition system based on ARM is such
a case.
Considering universality and expansibility, we have designed this data acquisition
system, mainly based on ARM processor and FPGA. The system consists of two main parts:
main board and peripheral board. The function of main board is to control peripheral parts,
and the main board is composed of ARM, extended memory and DC power. Then there are
FPGA, ADC, interface of LCD and UART in the peripheral board, which is used to acquire,
store, transmit and display data. In software design, Bootloader and protocol based on
Xmodem have been finished. In addition, the drivers of the touch screen and LCD have been
also developed. The friendly man-machine interface is obtained by using the uC/GUI.
Furthermore, the uC/OS-II, as a real-time preemptive multitasking operating system, has
been transplanted to the hardware platform. In the end, wavelet transformation is applied to
resolve overlapped data signal and a satisfying result has been achieved.
Key Words: Embedded system; ARM; Data acquisition; FPGA; Wavelet transformation;
