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摘要21世纪是信息的时代，现代高新科技日新月异，人们的生产生活已经实现了智能化、信息化，ARM处理器以其性能、结构、功耗上的优点，已成为许多行业嵌入式解决方案的首选。如今，基于ARM处理器的嵌入式系统在人们的日常生活中发挥着越来越重要的作用。
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本课题基于AT91SAM9G20设计了显控终端系统。首先给出了总体设计方案，完成了基于该芯片的显控系统的硬件设计，包括ARM处理器模块、电源模块、存储模块、时钟模块等构成的最小系统的设计，键盘和液晶显示的设计，和扩展接口的设计；然后完成了软件系统的设计和调试。测试结果表明系统工作稳定、实现了显控系统功能需求。19214
关键词 AT91SAM9G20 嵌入式 显示 控制
毕业论文设计说明书（论文）外文摘要
Title Display and Control System Design Based on ARM9
Abstract
The 21st century is the age of information, modern science and technology change with each passing day. The production and living of people have been intellectualized and informationalized. Due to the advantages on the performance, structure and power consumption, the ARM processor has become
the first choice of embedded solution for many industries. Nowadays, the embedded system based on ARM processor is playing an increasingly important role in people's daily life.
This paper designs a Display Control Terminal System based on the AT91SAM9G20. First we present the overall design, and complete the hardware design of the Display Control System based on the chip, including the design of the smallest system composed of the ARM processor module, power module, storage module and clock module, and the design of the keyboard, the LCD display, and the extended interface. Then we complete the design and debugging of the software system. Test results show that the system works stable and realizes the functional requirements of the Display Control System.
Keywords Embedded Systems, ARM, display-and-Control-Terminal
目 次
1. 绪论 1
1.1 选题背景 1
1.2 开发软件简介 1
1.2.1 电路设计软件 1
1.2.2 ARM开发软件 1
1.3 系统要求 2
1.4 本文内容及章节安排 3
2 系统硬件设计 5
2.1 总体结构设计 5
2.2 AT91SAM9G20最小系统设计 5
2.2.1 电源电路 6
2.2.2 时钟电路 9
2.2.3 复位模块 10
2.2.4 存储模块 10
2.2.5 键盘模块 14
2.2.6 显示模块 16
2.2.7 以太网接口电路 19
2.2.8 串行通信接口电路 19
3 系统软件设计 21
3.1 系统软件平台结构 21
3.2 软件系统流程图 21
3.3 AT91SAM9G20的启动 22
3.4 键盘驱动程序 23
3.5 显示接口程序设计 24
3.6 网络接口程序设计 25
3.7 串行接口程序设计 28
4. 功能测试 30
4.1 系统测试方案 30
4.2 测试过程及结果 30
4.2.1 ARM最小系统测试 30
4.2.2 显控模块测试 31
4.2.3 扩展接口测试 31
结 论 33
致 谢 34
1. 绪论