1602液晶显示与温度检测模块18b20，与89s52单片机通信，并在屏幕上显示，代码已经通过测试，可直接烧录程序。io口分配，见开头程序定义。是测试的好工具-1602 LCD display with temperature detection module 18b20, with 89s52 microcontroller communication, and displayed on the screen, the code has been tested for direct burni