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Implementing Audio Algorithms and Integrating Processor-Specific Code Using Model Based Design

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This paper explores the final stages in the model based design and implementation of an audio algorithm on a fixed-point embedded processor. Once the algorithm, a 3-band parametric equalizer in this example, is designed and simulated using a combination of scripting and graphical modeling tools, real-time C-code is automatically generated from this model. This paper illustrates how algorithmic C-code generated from such a model in Simulink can be integrated into an existing stand-alone embedded project as a library and implemented on an Analog Devices Blackfin® 537 processor. It also elaborates how processor specific C-callable assembly code can then be integrated into the model for both simulation and code generation to improve its execution performance on this processor.

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