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Using microcontrollers in digital signal processing applications

Posted: 30 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Digital signal processing algorithms? DSPs? FPGAs?

Digital signal processing algorithms are powerful tools that provide algorithmic solutions to common problems. For example, digital filters provide several benefits over their analog counterparts. These algorithms are traditionally implemented using dedicated DSP chips, FPGAs or RISC processors. While these solutions are very efficient at their purpose, they only perform one function in the system and can be both expensive and large. This application note discusses an alternative solution using a Silicon Labs MCU to implement DSP algorithms in less space and still have plenty of CPU bandwidth available for other tasks.

This application note discusses the implementation of three DSP solutions on the C8051F12x and C8051F36x family of MCUs: FIR filters; Goertzel Algorithm used for DTMF decoding; FFT algorithm.

For each of these topics, we introduce the algorithm, discuss the implementation of these algorithms on the DSP-enabled MCUs using the multiply and accumulate (MAC) engine, and provide a list of the CPU bandwidth and memory usage.

View the PDF document for more information.





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