使用MCU对bq34z100-g1进行校准，现在可以通过MCU对电压进行校准了，但电流校准一直搞不懂，特别是浮点数转换那里，有人说CC Gain的计算公式为：
CC Gain: data flash raw data 0x7F71205C, EVSW reading with: 10.124
Raw data (0x7F71205C) -> first two byte is for exp gain. The exp is 0x7F -> 127, so gain: (127-128-24) = -25 -> 2^(-25)
0x71205C OR with 0x80 = 0xF1205C -> convert into DEC and times 2^(-25) = 15802460*2^(-25) = 0.47095
CC Gain = 4.768/x = 4.768/0.47095 = 10.124 (matches!)
按照这样计算，确实可得到CC Gain的转换值，但有以下疑问：
1、(127-128-24)中为何要减去24？
2、CC Gain = 4.768/x中为何要4.768除以x？
