说明：  DS18B20的驱动子程序文件，内含1-wire读写协议时序，DS18B20寄存器的读写，对于嵌入式和单片机爱好者来说是个不错的学习程序，已经经过调试，很好使，我还对其进行了封装。外部函数可以直接调用。由于单总线对时序的严格要求，本程序只适合51单片机的11.0592M/12M晶振，高速单片机请将1-wire时序改写一下，IO口改成适合自己单片机的即可。
(DS18B20 driver subroutine file, containing 1-wire protocol to read and write timing, DS18B20 read and write registers, embedded and microcontroller for lovers is a good learning process has been debugged, so good, I its encapsulated. External function can be called directly. As the single bus on the strict timing requirements, this program only works for 51 single-chip 11.0592M/12M crystal, high-speed single-chip 1-wire timing set about rewriting, IO ports can be changed to fit their own microcontroller.)