DS18B20的源程序，主要是将检测到的温度进行进制转换-DS18B20 source, mainly the temperature detected M-ary conversion

Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies. MFSK is a form of M-ary orthogonal modulation, where each symbol consists of one element an alphabet of orthogonal waveforms. M