AT89S51 单片机实验及实践教程
目 录
第一章 AT89S51 单片机实验及实践系统板简介┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅1
第二章 Keil C 软件使用┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅14
第三章 AT89S51 单片机下载器软件使用┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅25
第四章 实验及实践课题┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅28
1. 闪烁灯┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅28
2. 模拟开关灯┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅31
3. 多路开关状态指示┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅33
4. 广告灯的左移右移┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅37
5. 广告灯（利用取表方式）┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅40
6. 报警产生器┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅43
7. I/O 并行口直接驱动 LED 显示┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅46
8. 按键识别方法之一┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅49
9. 一键多功能按键识别技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅53
10. 00－99 计数器┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅57
11. 00－59 秒计时器（利用软件延时）┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅60
12. 可预置可逆 4 位计数器┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅63
13. 动态数码显示技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅67
14. 4×4 矩阵式键盘识别技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅70
15. 定时计数器 T0 作定时应用技术（一）┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅79
16. 定时计数器 T0 作定时应用技术（二）┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅84
17. 99 秒马表设计┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅89
18. “嘀、嘀、……”报警声┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅95
19. “叮咚”门铃┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅99
20. 数字钟（★）┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅105
21. 拉幕式数码显示技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅114
22. 电子琴┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅121
23. 模拟计算器数字输入及显示┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅134
24. 8×8LED 点阵显示技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅141
25. 点阵 LED“0－9”数字显示技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅146
26. 点阵式 LED 简单图形显示技术┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅153
27. ADC0809 A/D 转换器基本应用技术 ┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅┅
┅157
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