基于ARM嵌入式系统的VGA接口的设计

发布时间：2018-04-17 15:22

本文选题：嵌入式系统 + Linux　；参考：《大连海事大学》2012年硕士论文

【摘要】：嵌入式系统的概念在20世纪70年代就开始出现,但是直到最近十几年,随着半导体技术、微电子技术和信息技术取得突飞猛进的发展,嵌入式系统开始得到广泛的应用。与桌面计算机不同,嵌入式系统针对特定需求进行专门设计,一般具有低成本、低功耗、小体积、高性能、高可靠性和软硬件可配置的特点。随着技术的发展和需求的扩大,传统的10英寸以下的嵌入式显示器严重限制嵌入式发展,而当今嵌入式系统接口标准不统一,给系统维护和显示器升级带来很大难度。VGA显示接口标准统一,市场覆盖广,技术成熟,目前使用非常广泛。以Linux为代表的嵌入式操作系统,将由窗口、菜单组成的可视化图形显示界面带入了嵌入式开发领域,代替了专业的命令语言,促进嵌入式系统在企业专用解决方案、工业控制和消费类产品等方面的更广泛应用。在嵌入式和Internet结合的时代,研究设计基于ARM构架的嵌入式Linux系统的VGA接口有助于嵌入式系统更好地实现人机交互,使其能在工业和生活等诸多领域中得到更广泛和深入应用。本文针对嵌入式系统和VGA接口的特点,将二者结合研究,实现了嵌入式Linux系统的VGA接口设计,具体过程如下： (1)基于S3C2440微处理器和ARMSYS2440嵌入式开发系统的特点,对Linux操作系统内核的裁剪,并移植系统到ARMSYS2440开发板中。 (2)详细分析VGA显示标准和嵌入式系统的LCD控制器工作原理,根据VGA采用模拟信号代替数字信号显示的特点,进行以ADV7123为核心的D/A转换电路模块的设计。 (3)结合VGA接口显示时序,应用C语言编程,对Linux操作系统内核的基于帧缓冲架构的显示驱动进行分析和修改,使其显示数据输出适合D/A转换,显示时序输出适合VGA显示时序。本研究内容是导航研究所承担的国家支撑计划课题"AIS/GNSS船载导航设备关键技术与系统研制”(2012BAH36B02)的部分内容,研究成果在设备的显示系统中得到了应用。
[Abstract]:The concept of embedded system began to appear in 1970s. However, with the rapid development of semiconductor technology, microelectronics technology and information technology, embedded system began to be widely used.Unlike desktop computers, embedded systems are specially designed for specific needs, generally with the characteristics of low cost, low power consumption, small volume, high performance, high reliability and configurable software and hardware.With the development of technology and the expansion of demand, the traditional embedded display with less than 10 inches restricts the development of embedded system seriously, but the standard of embedded system interface is not unified.It brings great difficulty to system maintenance and display upgrade. VGA display interface standard is unified, market coverage is wide, technology is mature, and it is widely used at present.The embedded operating system represented by Linux brings the visual graphical display interface composed of windows and menus into the field of embedded development, replaces the professional command language, and promotes the special solution of embedded system in enterprise.Industrial control and consumer products are more widely used.In the era of the combination of embedded system and Internet, the research and design of the VGA interface of embedded Linux system based on ARM framework is helpful for the embedded system to achieve better man-machine interaction and make it more widely and deeply applied in many fields such as industry and life.According to the characteristics of embedded system and VGA interface, this paper combines the two research, realizes the design of VGA interface of embedded Linux system, the concrete process is as follows:Based on the characteristics of S3C2440 microprocessor and ARMSYS2440 embedded development system, the kernel of Linux operating system is cut, and the system is transplanted to ARMSYS2440 development board.2) the VGA display standard and the working principle of LCD controller in embedded system are analyzed in detail. According to the characteristic that analog signal is used to replace digital signal display in VGA, the design of D / A conversion circuit module with ADV7123 as the core is carried out.Combined with VGA interface display timing and C language programming, the display driver based on frame buffer architecture of Linux operating system kernel is analyzed and modified, so that the display data output is suitable for D / A conversion, and the display timing output is suitable for VGA display timing.This research content is part of the national support plan project "key technology and system development of AIS/GNSS shipborne navigation equipment", and the research results have been applied in the display system of the equipment.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP334.7

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