基于AT89S52和DS18B20的单总线协议温度传感器，源码是严格按照时序图来编写的，延时问题很纠结，初学者可以通过时序图了解-AT89S52-based single-bus protocol and DS18B20 temperature sensor, source code is written in strict accordance with the timing diagram of the delay problem is very tangled, beginners can