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LED图文显示系统论文
电子信息工程学院 电子设计大赛论文 LED图文显示系统报告 参赛人员： 任毅超 王悦润 孙立财 参赛时间：2014.5.11——2014.6.16 指导教师： 邵 清 亮 目录 摘要···············································3 一、任务要求·······································4 1. 基本要求····································4 2. 发挥部分····································4 二、总体方案设计···································5 1.系统分析·····································5 2.方案论证·····································5 3.方案设计·····································6 4.系统总体方框图·······························6 三、电路与程序设计·································7 3.1 电路设计···································7 3.1.1 单片机选择及系统电路···················7 3.1.2 亮度自动调节装置·······················8 3.1.3 电路稳压模块···························8 3.1.4 电平检测电路···························9 3.2 程序设计···································9 3.2.1 主函数·································9 3.2.2 定义STC12C5A16S2的各拐角功能·········10 3.2.3 二极管检测····························10 3.2.4 从大到小亮同心圆······················11 3.2.5 从小到大亮同心圆······················12 3.2.6 显示“IT”·····························13 3.2.7 显示“电”·····························14 3.2.8 显示“时钟”··························16 3.2.9 电机起转函数·························17 3.2.10 电机停转函数·························18 3.2.11 消息等待·····························19 测试结果······································21 4.1 测试工具··································21 4.2 测试结果完整性····························21 4.3 测试结果分析······························21 五、参考文献······································22 六、附录··········································23 附录一 控制电路电路图·························23 附录二 设计源程序·····························24 附录三 元器件清单·····························43 摘 要 LED旋转显示器时基于视觉暂留原理，开发的一种旋转式LED显示屏。本设计基于STC89C52RC单片机，通过步进电机带动旋转，在具有一定转速地载体上安装16个LED发光器件，各LED发光管等间距排位一条直线，随着旋转速度的加快，不断扫描出预设的文字，图案等。 针对传统LED显示屏视角单一、体积较大、需要的发
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