Design and Implementation of LCD Driver Based on Embedded Linux

Project Name: Design and Implementation of LCD Driver Based on Embedded Linux
Source: 12th “Challenge Cup” Provincial Competition Entry
Subcategory: Information Technology
Category: Academic Paper in Natural Sciences

Introduction: This project provides a detailed introduction to embedded systems, embedded Linux systems, and the working principles of LCD displays. It explains how to design an LCD driver under the embedded Linux system and implement its functionality on the Greate-PXA255 development platform.

Advantages of Embedded Linux Systems: Low cost, support for various hardware platforms, excellent performance, and good network support.
Advantages of LCD: Compact size, low power consumption, suitable for resource-constrained embedded systems.

Design Objectives: To design an LCD driver based on Intel’s Greate-PXA255 embedded Linux development platform to achieve text display.
Development Platform and Tools:

Implemented Functionality: FrameBuffer redraws correctly, achieving normal output on the LCD display.

Purpose of Writing: To enable the normal driving of the LCD display under the embedded Linux operating system.
Basic Approach:

Scientific Aspect: Designed and implemented based on the working principles of embedded Linux systems and LCD displays.
Advanced Aspect: Utilized the Greate-PXA255 development platform and advanced development tools.
Unique Aspect: Designed an LCD driver specifically for the Greate-PXA255 platform to achieve text display functionality.

Practical Application Value: Successfully implemented an LCD driver under the embedded Linux system and verified its functionality on the Greate-PXA255 platform.
Practical Significance: Provides convenience for the normal driving of LCD displays under the Linux operating system, promoting the development of embedded systems.

Abstract: With the rapid development of computer technology, embedded Linux systems and LCD displays are playing an increasingly important role in the control of various instruments and devices. This paper utilizes the Intel Greate-PXA255 system development platform based on Linux and the commonly used “host/target” development model in embedded system development. By using various editing and compiling tools under the embedded Linux system, the Linux kernel driver is rewritten, and through kernel compilation and updates, the LCD display driver is implemented using frame buffer methods. Experimental results demonstrate that the LCD screen can output normally.

[1] Xia Jingbo, Chen Yaru. Principles and Development of Embedded Systems [M]. Xi’an University of Electronic Science and Technology Press, 2006.
[2] Wang Weiqiang. Introduction to Embedded Linux Development [M]. Electronics Industry Press, 2003.
[3] Huang Ziqiang. Principles of LCD Display [M]. National Defense Industry Press, 2006.
[4] Liu Bing, Wu Yuyu. Practical Linux Tutorial [M]. China Water Power Press, 2004.
[5] Zou Siyi. Design and Application of Embedded Linux [M]. Tsinghua University Press, 2002.
[6] Sun Qiong, Qu Yanlian. Detailed Explanation of Embedded Linux Application Development [M]. People’s Posts and Telecommunications Press, 2006.
[7] Li Weishi, Guo Qiang. LCD Display Application Manual [M]. Electronics Industry Press, 2000.
[8] Ni Jili. Analysis and Programming of the Linux Kernel [M]. Electronics Industry Press, 2005.
[9] Robert Love. Linux Kernel Design and Implementation [M]. Mechanical Industry Press, 2006.
[10] Alessandro Rubini. Linux Device Drivers [M]. China Electric Power Press, 2000.

Historical Background: Early embedded processors had limited speed, and display devices were usually monochrome LCDs with simple user interfaces lacking graphical user interface (GUI) support.
Current Development Status: With the widespread adoption of high-performance embedded processors and the continuous reduction of hardware costs, color LCDs are increasingly used in embedded systems, such as the new generation of PDAs that often use TFT display devices, supporting color graphical interfaces, image display, and video media playback.
Operating Systems: Operating systems like Microsoft Windows CE and PalmOS are widely used in PDAs, while Linux, as an open-source operating system, also occupies a place.
Graphical Interface Software Packages: Many graphical interface software packages have emerged under Linux, such as MiniGUI and Embedded QT, which are comparable to Windows CE in terms of graphical interface and development tools.
Low-Level LCD Driver Issues: The development and porting of graphical software packages all involve low-level LCD driver issues.

This project, based on the embedded Linux system and the Greate-PXA255 development platform, designed and implemented an LCD driver, achieving text display functionality, providing convenience for the normal driving of LCD displays under the Linux operating system, and promoting the development of embedded systems.