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Stellaris launchpad - Spectrum analyzer

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Published on Nov 23, 2012

Stellaris launchpad LM4F120. Graphics library by Chicken (http://forum.stellarisiti.com/topic/2...), FFT and ADC functionality by myself.

ADC samples 2048 values at 88.2kHz and averages of two consecutive values are saved into buffer (2x SW oversampling). This results buffer with 1024 values, which are used in FFT calculation. 1024 values at 44.1kHz limits FPS to 44.

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