目 录
1 课题简介...............................................................................................................................................................7
1.1 课题名称:................................................................................................................................................7
1.2 课题目的....................................................................................................................................................7
2 单词记忆测试器方案设计...................................................................................................................................7
2.1 设计思路....................................................................................................................................................7
2.2 系统流程图................................................................................................................................................8
3 单词记忆测试器硬件电路设计...........................................................................................................................9
3.1 系统整体框图............................................................................................................................................9
3.2 AT89C51 单片机引脚图..........................................................................................................................10
3.3 单片机外围时钟电路图..........................................................................................................................11
3.4 单片机外围复位电路图..........................................................................................................................12
3.5 LCD 显示器电路......................................................................................................................................13
3.6 电路设计原理图......................................................................................................................................16
4 单词记忆测试器软件编程设计.........................................................................................................................16
4.1 程序设计思路..........................................................................................................................................16
4.2 键盘扫描..................................................................................................................................................16
4.2 检查状态是否忙......................................................................................................................................17
4.3 写控制字..................................................................................................................................................18
4.4 LCD 液晶初始化......................................................................................................................................18
4.5 LCD 显示函数..........................................................................................................................................19
5 实验与结果分析.................................................................................................................................................20
5.1 软件仿真调试..........................................................................................................................................20
5.2 实验用仿真软件......................................................................................................................................20
5.3 实验结果分析..........................................................................................................................................20
6 小结与体会.........................................................................................................................................................22
参 考 文 献...........................................................................................................................................................23
附 录.......................................................................................................................................................................24