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[
Internet-Network
]
8255
DL : 0
关于复杂网络中基于科研作者合作网络的分析与研究, 同时对作者合作网模型做了实证分析,这个PDF文档对于学者有重要的参考价值-Based on the research of complex network analysis and research cooperation network, while cooperation network model of an empirical analysis, this PDF document for important reference value to scholars
Date
: 2025-12-19
Size
: 254kb
User
:
Limi
[
Internet-Network
]
1234
DL : 0
带数码管显示的交通灯模拟控制系统设计. 硬件方面:8253产生1HZ的方波,脉冲到8259的IR1端,产生中断,调中断服务子程序。在加入紧急车道后,单脉冲()连到8259的IRO端,产生一个高级的中断请求信号。 软件方面:主程序先对各个硬件初始化,在开CPU中断,然后空操作,等待中断。执行低级中断(IR1)时,8255的PA口负责选数码管,PB口负责显示数字,用查表法可查到0~9的数码管编码。 采用循环扫描方法,人眼即可看到连续的二位数。当倒计时减到零时,对红绿灯取反。若手动上下拨动单脉冲()一次,则产生一个高级中断(IR0),程序转而执行此中断处理程序,处理完后返回继续执行低级中断(IR1)。 -Traffic lights analog control system design with digital display
Date
: 2025-12-19
Size
: 6kb
User
:
宋威
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