系统与接口总线
系统与接口总线
用汇编程序控制八盏灯亮灭
书上代码
用C51编写程序，要求定义一8位全局字节变量cLed，该变量指定定义在data区的20H处，为该变量赋初值0xfe;按仿真图中K3按键， 下降沿触发外部中断0（C语言中的中断矢量号为0）， 在中断程序中，每中断一次，用内嵌汇编使cLed占用的单元内容循环左移1位（不带进位的循环），然后用C语句把cLed送到P2口。
- 画出仿真图
- 编写程序：定时器1工作于8位自动重装模式，定时器0工作于普通16位定时计数模式； 要求定时器0每1ms中断一次，定时器1每100us中断一次；结合定时器0， 编写1ms软件延时与中断结合的延迟函数，提高定时精度；定时器1中，每中断一次， 使P1.0和P1.1反转（P1.0初值为0，P1.1为1）。主循环程序反复调用延迟函数，每500ms使P2口的8个管脚反转一次
实现串行输入输出
矩阵键盘输入LCD显示所按下的值
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
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Some thing interesting about web. New door for the world.
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