电能表计量芯片SOC：V9401的单点校表法-Power metering chip SOC: V9401 single point calibration method

ATT7022芯片的C程序例程，ATT7022是一颗高精度三相电能专用计量芯片，适用于三相三线和三相四线应用。-ATT7022 chip C routine, ATT7022 is a high-precision three-phase power metering chip, for three-phase three-wire and three-phase four-wire applications.