Abstract
This article is an introduction to the FRIDGE design environment which supports the design and DSP implementation of fixed-point digital signal processing systems. We present the tool-supported transformation of signal processing algorithms coded in floating-point ANSI C to a fixed-point representation in SystemC. We introduce the novel approach to control and data flow analysis, which is necessary for the transformation. The design environment enables fast bit-true simulation by mapping the fixed-point algorithm to integral data types of the host machine. A speedup by a factor of 20 to 400 can be achieved compared to C++-library-based bit-true simulation. FRIDGE also provides a direct link to DSP implementation by processor specific C code generation and advanced code optimization.
Highlights
Digital system design is characterized by ever-increasing complexity that has to be implemented within reduced time, resulting in minimum costs and short time-to-market
During the development of the Fixed-point pRogrammIng and Design Environment (FRIDGE) design environment, we have identified a need for accurate data flow analysis to cater the needs of the interpolation, the fast simulation code generation and the target specific code optimization
The published methods were not capable of matching the requirements, we have developed a novel approach for data flow analysis that can provide the necessary data for the FRIDGE back ends
Summary
Digital system design is characterized by ever-increasing complexity that has to be implemented within reduced time, resulting in minimum costs and short time-to-market. Algorithm design starts from a floating-point description that is analyzed by means of simulation without taking the quantization effects into account This abstraction from all implementation effects allows an exploration of the algorithm space, for example, the evaluation of different digital receiver structures. (4) A seamless design flow down to system implementation, generating optimized input for DSP compilers These requirements have been the motivation for the Fixed-point pRogrammIng and Design Environment (FRIDGE) [6, 7, 8], an interactive design environment for the specification, simulation, and implementation of fixed-point systems. FRIDGE relies on five main concepts which are briefly introduced in the following
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