As technology advances, our demand for electronics has increased significantly, making a convenient, flexible, and reasonably priced power source an essential component for electronic products. The programmable DC power supply, equipped with microcomputer control, boasts highly advanced technology and ease of operation. It is compact in size and extremely lightweight. Due to these features, it has gained widespread popularity among consumers. However, what many may not know is the communication principle behind the serial port of the programmable DC power supply.
The programmable DC power supply now features two communication interfaces. One is for communication with the host computer and touch screen, as well as program downloading. The other is solely responsible for network setup and control of communication. In the communication of the programmable DC power supply, data is transmitted between two stations. On the communication line, there are three modes: simplex transmission, half-duplex transmission, and full-duplex transmission.
Single-wire communication typically uses a single wire, where the signal has a clear directional property, and communication occurs in only one direction. The wire serves both as a transmitter and a receiver, allowing data to be transmitted in both directions, but not simultaneously. Therefore, it is called half-duplex. During operation, the transmitters and receivers at both ends are switched to the communication line via a transmit-receive switch to switch directions.
Full-duplex communication utilizes two wires for separate transmission, allowing data to be sent simultaneously. This method is called full-duplex, enabling transmission in both directions at the same time without the need for direction switching. Serial communication in programmed DC power supplies can also be categorized into two types: synchronous communication and asynchronous communication.
