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A．Research shows that most people are carrying a gene that allows the body to break down caffeine quickly. B．Research shows that even some people have faster gene, they should limit the cups of coffee each day. C．Drinking coffee will only do harm to people's health. D．People who have a slower gene should not drink coffee more than three cups a day.
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【简答题】假定单片机系统中有4个共阴极数码管,采用动态连接方式,其段选端并联在一起由P1口控制,数码管的位选端由P2口低4位控制。基于该电路,编写以下程序: (1)编写动态显示扫描函数,编程要求每位数码管显示的延时时间为1ms(假定为12MHz晶振),延时程序请用定时器T1的工作方式2实现。(10分) (2)调用动态显示函数,显示无符号整型变量miao中的内容(假定变量miao中存放的是一个0-9999的四...