Abstract:

With the development of multimedia technology, the demand of the transmission of multimedia data through the E1 circuit in real time is gradually increasing. Most of the existing system devide E1 transmission equipment is seperated from multimedia processing equipment, so the design of multimedia data transmission circuit wes TMS320DM642 as the main CPU and based on the PM4351 of chip E1. In hardware design, CPU connected with PM4351 chip by McBSP(Multiple channel Buffer Serial Port) and used bus interface to configure date, achieveing the multimedia data transmission functions of the E1 interface. The software design includes driver design, E1 configuration, transmitting and receiving data. Experiment shows that verification, the E1 subslot manner can be used to send and receive data in the circuit.

Key words: DM642 chip, PM4351 chip, E1 interface circuit