说明：  可以实现基本VBA功能，可以控制Load和DC source的开关以及读到他们的状态和电压电流参数，同时还附有CAN和串口的底层程序，可用这些串口功能log设备的相关变量及参数信息，只需CALL相应功能就能实现相应功能。
(It can realize the basic VBA function, control the switch of load and DC source, read their state and voltage and current parameters, at the same time, it also has the bottom program of can and serial port, which only needs the corresponding function of call to realize the corresponding function.)