单总线多点测温系统，单总线它采用单根信号线既传输时钟又传输数据，而且数据传输是双向的它具有节省I/O 口线资源结构简单成本低廉便于总线扩展和维护等诸多优点。本系统中所有的DS18B20都接在单片机的P1.1口上。用一个液晶屏显示，从单片机P3口接上8个开关，与右边的DS18B20 编号对应。当没有开关按下时屏幕显示"which NO you want press which key",要想看那一点处的温度就按下几号键-Single-bus multi-point temperature measurement system, a single bus, it uses a single transmission clock signal lines also transmit both data and data transmission is a two-way it has to save I/O port line resources to facilitate simple structure and low-cost expansion and maintenance of the bus and many other advantages of . All the DS18B20 this system are connected to the P1.1 port on the microcontroller. With an LCD screen display, from the microcontroller port connected to the eight switches P3, with the right DS18B20 numbers correspond to. When there is no switch is pressed, the screen displays " which NO you want press which key" , To Look at 1:00 at the temperature of the press a few keys, No.