ABSTRACT
According to the development of the application of computer systems and computer networks, kinds of equipment’s communication function is increasingly important, use the master-slave control system what the up-bit pc and down-bit MCU are constituted being more and more. The thesis takes the AT89S52 SCM as the core devices, and make use of the temperature sensor DS18B20.The 1602 LCD shows the collected temperatures. At the same time, at the up and down bit system of the component pc and SCM ,use the RS232 of the base three-wire serial port transmitting the datum that are collected by the SCM to the pc, and use the VB up-bit machine showing the picture of the temperature wave. The system of the temperature inspection imposes the technology of DS18B20 temperature sensor, at the standard of the RS232 Serial communication, connect the VB and up-down bit system, formed a single bus temperature system that is a sensible. At the first of all ,this case introduces the actuality of the technology in measure and control temperature, and ,it makes a simple analyzing and comparing; secondly, from the actually application, it turns to the design and style of the hardware part of the temperature sensor, design and analyze of the software, and follow the simple ,economic applied principle when it is carried out; and then introduces the details of the system that all kinds of using CMOS chip’s characteristics ,the elements of theory, applications and with the communication between the SCM agreement.
