目 录
1 绪论 .................................................................................................................................................................1
2 总体设计方案 .................................................................................................................................................1
2.1 硬件电路组成及介绍 ..........................................................................................................................1
2.1.1 AT89C51 单片机 ......................................................................................................................2
2.1.2 LED 显示屏...............................................................................................................................4
2.2 系统各单元电路设计 ..........................................................................................................................4
2.2.1 最小系统 ...................................................................................................................................4
2.2.2 驱动电路设计 ...........................................................................................................................6
2.2.3 上拉电阻 ...................................................................................................................................7
2.2.4 显示电路 ...................................................................................................................................7
2.2.5 时钟电路 ...................................................................................................................................8
2.3 字符的点阵显示原理及字库代码获取方法 ......................................................................................9
3 程序设计 .......................................................................................................................................................11
3.1 程序流程图 ........................................................................................................................................11
3.2 程序设计 ............................................................................................................................................11
4 调试及性能分析 ...........................................................................................................................................15
4.1 系统调试 ............................................................................................................................................15
4.1.1 软件调试 .................................................................................................................................15
4.1.2 硬件调试 .................................................................................................................................15
4.2 性能分析 ............................................................................................................................................15
4.3 实物效果图 ........................................................................................................................................16
5 设计总结 .......................................................................................................................................................17
心得体会 .............................................................................................................................................................18
参考文献 .............................................................................................................................................................19
附 录 ...................................................................................................................................................................20
附录 1 原件清单 ........................................................................................................................................20
附录 2 硬件原理图 .....................................................................................................................................20
