For data communication in DSP-based telephony system we have developed a full-featured HDLC transceiver that is equivalent and has been tested with standard hardware-based solutions such as Zarlink MT8952.
This HDLC algorithm implements the data link layer (Layer 2) of the OSI High-level Data Link Control protocol on TMS320C54x and C55x processors.
This solution is perfect whenever a few MIPS are available in a DSP based system and cost is an issue.
The algorithm supports multi-channel operation and can easily be integrated in a C environment. A simple API and sample C-code is provided for easy integration into the target system. The algorithm is indepedent of the target I/O configuration, i.e. it supports any type of data source and sink (serial/serial, serial/HPI etc.).
Datasheet