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论文编号 ZXX216 论文字数:10024,页数:30
摘要
目前LED显示屏已经广泛应用到银行,邮电,税务,机场,车站,证券市场及其它交易市场,医院,电力,海关,体育场等需要进行公告,宣传的场合。
本次设计的LED显示屏是利用发光二极管点阵模块组成的平面式显示屏幕.采用单片机方案,控制功能的实现在硬件和软件两反面进行互补。单片机及相应软件主要负责存储(或生成)显示数据,安排控制信号的定时与顺序,上位机进行通讯等。硬件电路是对单片机驱动能力不足的补充,大体可以分为:微机本身的硬件、显示驱动电路、控制信号电路三部分。
关键词 ：单片机、LED发光二极管、扫描驱动
ABSTRACT
It has been widely applied to many occasions that need to be announced and publicized, such as bank, posts, tax administration, airport, securities market and other trading markets, hospital, electricity, customs and stadium in recent years.
The LED display designed this time is a flat screen that is made up of light emitting diode dot matrix module. Single-chip was adopted. The implementation of control function is to combine the advantages of both the hardware and the software. Single-chip and relevant software are mainly used for storage (or generate) display data, arranging the timing and sequence of control signals and the communication with the upper computer, etc. The hardware circuit is the supplement of the single-chip with its limited driving ability. It can be divided into three parts: the hardware of the computer itself, the display driving circuit and the signal control circuit.
Keywords: Single chip, Light emitting diode, Scan driving mechanism
目录
摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 课题内容与目标 1
1.3 研究方法 2
第2章 方案和器件的选择 3
2.1 LED器件驱动方式的选择 3
2.1.1 直流驱动 3
2.1.2 恒流驱动 3
2.1.3 脉冲驱动 4
2.2 主控CPU的选择 5
2.3 各种元器件的选择及相应介绍 6
2.3.1 74HC595 6
2.3.2 74HC138 6
2.3.3 74HC245 7
2.3.4 74HC4953 7
2.3.5 ARM920T(s3c2410a) 7
第3章 硬件控制电路的设计与制作 10
3.1 单片机系统及外围电路 11
3.2 行驱动器 12
3.3 列驱动器 13
第4章 系统程序的设计 14
4.1 显示驱动程序 14
4.2 系统主程序 15
4.3 系统完成连接 15
第5章 结束语 17
第6章 致谢 18
参考文献 19
附录 源代码 20 |
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发表于 20:50