目录
一引言------------------------------------------------------------------------------------------------------------------ 1 二设计任务与要求 -------------------------------------------------------------------------------------------------------- 1
2.1 设计任务 ----------------------------------------------------------------------------------------------------------- 1
2.2 设计要求 ----------------------------------------------------------------------------------------------------------- 1 三方案总体设计 ----------------------------------------------------------------------------------------------------------- 2
3.1 显示时间方案的选择-------------------------------------------------------------------------------------------- 2
3.2 总体设计 ----------------------------------------------------------------------------------------------------------- 2
3.3总体设计 ------------------------------------------------------------------------------------------------------------ 2 四硬件设计------------------------------------------------------------------------------------------------------------------ 4
4.1 单片机最小系统 -------------------------------------------------------------------------------------------------- 4
4.1.1 STC89C52单片机特性参数 --------------------------------------------------------------------------- 4
4.1.2 STC89C52RC主要引脚功能 --------------------------------------------------------------------------- 4
4.1.3 STC89C52RC的中断源---------------------------------------------------------------------------------- 5
4.1.4 时钟电路 -------------------------------------------------------------------------------------------------- 5
4.1.5 复位电路 -------------------------------------------------------------------------------------------------- 6
4.2 数码换显示电路 -------------------------------------------------------------------------------------------------- 6
4.3 红绿灯显示电路 -------------------------------------------------------------------------------------------------- 8
4.4 整体电路 ----------------------------------------------------------------------------------------------------------- 9 五软件设计---------------------------------------------------------------------------------------------------------------- 10
5.1 KEIL C简介------------------------------------------------------------------------------------------------------ 10
5.2 程序流程图 ------------------------------------------------------------------------------------------------------ 10
5.3 keil调试过程 -------------------------------------------------------------------------------------------------- 11 六系统仿真 ----------------------------------------------------------------------------------------------------------------- 13
6.1 proteus仿真软件简介 --------------------------------------------------------------------------------------- 13
6.2 仿真调试过程 --------------------------------------------------------------------------------------------------- 13 七设计总结 ----------------------------------------------------------------------------------------------------------------- 15 参考文献 ----------------------------------------------------------------------------------------------------------------- 16
