HDLCiin

HDLCiin, or High-Level Data Link Control with Integrated Interrupts, is a communication protocol used in data transmission over point-to-point and multipoint links. It is an enhanced version of the HDLC protocol, which was developed by the International Organization for Standardization (ISO) in the 1970s. HDLCiin incorporates additional features to improve efficiency and reliability in data communication.

One of the key features of HDLCiin is its integrated interrupt mechanism. This allows for more efficient handling of data frames, reducing the overhead associated with traditional interrupt handling methods. The protocol supports both synchronous and asynchronous transmission modes, making it versatile for various applications.

HDLCiin uses a frame structure that includes a flag, address, control, information, and frame check sequence (FCS) fields. The flag field marks the beginning and end of a frame, while the address field identifies the secondary station in a point-to-point link. The control field contains commands and responses for link management, and the information field carries the actual data. The FCS field is used for error detection.

The protocol supports both normal response mode (NRM) and asynchronous response mode (ARM) for link management. In NRM, the primary station polls each secondary station to determine if it has data to send. In ARM, secondary stations can send data without being polled, improving efficiency in certain applications.

HDLCiin is widely used in industrial automation, telecommunications, and other fields where reliable and efficient data communication is crucial. Its robust error detection and correction mechanisms, along with its integrated interrupt handling, make it a reliable choice for various communication needs.