此段代码用于设计单片机系统中加入的温度采集模块，利用18b20实现0.5精度，0.0625分辨率，0.1显示，带负温度显示。-This code is used to join in the design of the SCM system temperature acquisition module using 18b20 0.5 accuracy, resolution of 0.0625, 0.1, with a negative temperature display.