Designing control circuits for FPGA-based DSP systems

If you need to design a control circuit for your FPGA-based DSP system, these simple techniques could save you days of work.

By Narinder Lall and Brad Taylor, Xilinx, Inc.
August 11, 2006 -- pldesignline.com

FPGAs have made significant strides as engines for implementing high-performance signal processing functions, whether for ASIC replacement or performance acceleration in the signal processing chain with DSP processors. Although much has been written about how to use FPGAs as signal processors, not much has been published about building control circuits within such systems.

There are perhaps two key decisions to make when implementing control circuits for FPGA-based DSP systems:

Should the control circuit be implemented in hardware or developed as a software algorithm?
What building blocks are available to make the development of the control circuit as efficient and painless as possible?

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