DMA-based communications between PC and DSP

In recent years many fast Digital Signal Processing chips have appeared in the market. A signal processing workstation has been designed to get optimum performance from the TMS32010 signal processor. The host system is built around MC68000 which handles the system control functions. It also shares those tasks of the signal processing algorithms that it can do better than the TMS32010. A dual bank data memory is provided on the DSP card to allow this sharing of tasks in an efficient way and to enable the parallel operation of the two processors. The resulting throughput is significantly higher than that in a conventional approach.

A Signal Processing Workstation on the VME Bus

With the shortage of facilities for general control, TMS320C25 is often used as the slave processor in a master-slave system. The authors introduce the concepts and relationships of various common memories (like dual-access, dual-port and dual-bank memory), through which communication between any two processors can take place. Accordingly, the authors discuss a dual-bank controller with GAL chips, present a TMS320C25 module with the dual-bank data memory under PC-bus, and describe the module's features. >

G. Umamaheswari

Papers

Signal processing implementation with a dual-bank memory

A Signal Processing Workstation on the VME Bus