基于单片机的led点阵电子显示屏长师毕业设计

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1、基于单片机的LED点阵电子显示屏长师毕业设计目录摘要·······················································································IABSTRACT·················································································II第一章系统整体设计方案········································

2、·····················11．1需要实现的功能·······························································11．2设计方案论证··································································1第二章系统硬件部分设计·····························································32.1电源设计····

3、···································································32．2单片机系统及外围电路·······················································42.2.1单片机的选择··························································42.2.1AT89C55芯片介绍·································

4、····················4652.2.1单片机系统外围电路··················································72.3列驱动电路····································································82.4行驱动电路····································································82.4.1列驱动电路····

5、························································82.4.1行驱动电路···························································102.5LED显示屏电路······························································11第三章系统软件部分设计··········································

6、···················143.1系统主程序··································································143.2显示驱动程序································································15第四章调试及性能分析································································174.1系统调试6

7、5·····································································174.2性能分析·····································································17结束语···················································································18致谢················

8、······································································19参考文献·················································································20附录···············································