Research And Implementation Of Impedance Measurement System And Graphical Interface Based On Embedded Linux

Impedance measurement is one of the most important aspects of modern electronicmeasurement techniques. It is essential to develop a stable high speed, easily operational instrumenthaving a friendly graphical interface for impedance measurement.This thesis presents an ARM9as the core, taking FPGA as the data collection tool, tocustomize the keyboard and screen for interactive operation and display interface hardware platform,embedded Linux as operating system, using Qt/Embedded as a development tool, the softwaresystem is developed to measure. Methods of measurement software system interface driver programand graphical user interface are researched.Cross compile environment is established. Embedded Linux system is processed and moved toARM. According to the custom keyboard, designs the method of keyboard kernel Qt/E map, themethod greatly facilitates the development of Qt/E applications, to achieve the control of Qt/Eapplication through the keyboard operation, to achieve the goal of human-computer interaction. Thedesign and implementation of the graphic display interface module, data communication modulebetween ARM and FPGA. According to the characteristics of impedance measurement, analysis ofthe measurement data processing, mapping algorithm is given an arbitrary interval logarithmiccoordinate system, the software is developed by using Graphics View Qt/Embedded technology,realizes the keyboard input, text and graphics, a variety of display, data storage and print functionsof the graphical user interface, input impedance measurement provides rich interactive operation.Finally, we design and implement the system, and do different test to verify the system.