Tiny Planet is small device connected to a GSM cell phone. When the mobile receives a predefined SMS (text message), like "Activate burglar alarm" or "Start backup pump", the circuit automatically recognizes it as a command, and switches the output p

抢答计时器 汇编语言 包含器件：8255 8253 七段数码显示管 在按下开关后开始计时-Answer in the timer assembly language Contains the device: 82,558,253 segment digital display tube Start time after the switch is pressed

定时器控制LED灯由单片机内部定时器1，按方式1工作，即作为16位定时器使用每0.05秒钟T1溢出中断一次。P1口的P1.0-P1.7分别接八个发光二极管。编写程序模拟时序控制装置。开机后第一秒钟L1，L3亮，第二秒钟L2，L4亮，第三秒钟L5，L7亮，第四秒钟L6，L8亮，第五秒钟L1，L3，L5，L7亮，第六秒钟L2，L4，L6，L8亮，第七秒钟八个LED灯全亮，第八秒钟全灭，以后又从头开始，L1，L3亮，然后L2，L4亮……一直循环下去。 -LED lights a timer con

编写程序控制音乐发生器和LED工作使他们组成声光报警装置，自己设置按键来控制音乐发生器启停。-Write a program to control the music generator and LED work to make them audible alarm device composition, set up their own start and stop buttons to control music generator.