测试系统电源发生变化时设备电源变化情况，使PC机进入等待状态再回到正常工作状态，观看输出-test system power changes in power equipment changes, so PC access wait state to return to normal operating status, watching output

mgcamd source code, for DVB STB box based on power pc

用上位机控制电源，进行实时控制，如设置电流电压，读取电流电压等。-Using PC to control the power, real-time control, such as the setting of current and voltage, the read current voltage.