From 6ab94e0b318884bbcb95e2ea3835f951502e1d99 Mon Sep 17 00:00:00 2001 From: jaseg Date: Wed, 14 Oct 2020 12:47:28 +0200 Subject: Move firmware into subdirectory --- .../arm_fft_bin_example/arm_fft_bin_example_f32.c | 158 +++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 fw/cdc-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c (limited to 'fw/cdc-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c') diff --git a/fw/cdc-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c b/fw/cdc-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c new file mode 100644 index 0000000..91d15b5 --- /dev/null +++ b/fw/cdc-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c @@ -0,0 +1,158 @@ +/* ---------------------------------------------------------------------- +* Copyright (C) 2010-2012 ARM Limited. All rights reserved. +* +* $Date: 17. January 2013 +* $Revision: V1.4.0 +* +* Project: CMSIS DSP Library +* Title: arm_fft_bin_example_f32.c +* +* Description: Example code demonstrating calculation of Max energy bin of +* frequency domain of input signal. +* +* Target Processor: Cortex-M4/Cortex-M3 +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions +* are met: +* - Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* - Redistributions in binary form must reproduce the above copyright +* notice, this list of conditions and the following disclaimer in +* the documentation and/or other materials provided with the +* distribution. +* - Neither the name of ARM LIMITED nor the names of its contributors +* may be used to endorse or promote products derived from this +* software without specific prior written permission. +* +* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +* POSSIBILITY OF SUCH DAMAGE. + * -------------------------------------------------------------------- */ + +/** + * @ingroup groupExamples + */ + +/** + * @defgroup FrequencyBin Frequency Bin Example + * + * \par Description + * \par + * Demonstrates the calculation of the maximum energy bin in the frequency + * domain of the input signal with the use of Complex FFT, Complex + * Magnitude, and Maximum functions. + * + * \par Algorithm: + * \par + * The input test signal contains a 10 kHz signal with uniformly distributed white noise. + * Calculating the FFT of the input signal will give us the maximum energy of the + * bin corresponding to the input frequency of 10 kHz. + * + * \par Block Diagram: + * \image html FFTBin.gif "Block Diagram" + * \par + * The figure below shows the time domain signal of 10 kHz signal with + * uniformly distributed white noise, and the next figure shows the input + * in the frequency domain. The bin with maximum energy corresponds to 10 kHz signal. + * \par + * \image html FFTBinInput.gif "Input signal in Time domain" + * \image html FFTBinOutput.gif "Input signal in Frequency domain" + * + * \par Variables Description: + * \par + * \li \c testInput_f32_10khz points to the input data + * \li \c testOutput points to the output data + * \li \c fftSize length of FFT + * \li \c ifftFlag flag for the selection of CFFT/CIFFT + * \li \c doBitReverse Flag for selection of normal order or bit reversed order + * \li \c refIndex reference index value at which maximum energy of bin ocuurs + * \li \c testIndex calculated index value at which maximum energy of bin ocuurs + * + * \par CMSIS DSP Software Library Functions Used: + * \par + * - arm_cfft_f32() + * - arm_cmplx_mag_f32() + * - arm_max_f32() + * + * Refer + * \link arm_fft_bin_example_f32.c \endlink + * + */ + + +/** \example arm_fft_bin_example_f32.c + */ + + +#include "arm_math.h" +#include "arm_const_structs.h" + +#define TEST_LENGTH_SAMPLES 2048 + +/* ------------------------------------------------------------------- +* External Input and Output buffer Declarations for FFT Bin Example +* ------------------------------------------------------------------- */ +extern float32_t testInput_f32_10khz[TEST_LENGTH_SAMPLES]; +static float32_t testOutput[TEST_LENGTH_SAMPLES/2]; + +/* ------------------------------------------------------------------ +* Global variables for FFT Bin Example +* ------------------------------------------------------------------- */ +uint32_t fftSize = 1024; +uint32_t ifftFlag = 0; +uint32_t doBitReverse = 1; + +/* Reference index at which max energy of bin ocuurs */ +uint32_t refIndex = 213, testIndex = 0; + +/* ---------------------------------------------------------------------- +* Max magnitude FFT Bin test +* ------------------------------------------------------------------- */ + +int32_t main(void) +{ + + arm_status status; + float32_t maxValue; + + status = ARM_MATH_SUCCESS; + + /* Process the data through the CFFT/CIFFT module */ + arm_cfft_f32(&arm_cfft_sR_f32_len1024, testInput_f32_10khz, ifftFlag, doBitReverse); + + /* Process the data through the Complex Magnitude Module for + calculating the magnitude at each bin */ + arm_cmplx_mag_f32(testInput_f32_10khz, testOutput, fftSize); + + /* Calculates maxValue and returns corresponding BIN value */ + arm_max_f32(testOutput, fftSize, &maxValue, &testIndex); + + if (testIndex != refIndex) + { + status = ARM_MATH_TEST_FAILURE; + } + + /* ---------------------------------------------------------------------- + ** Loop here if the signals fail the PASS check. + ** This denotes a test failure + ** ------------------------------------------------------------------- */ + + if ( status != ARM_MATH_SUCCESS) + { + while (1); + } + + while (1); /* main function does not return */ +} + + /** \endlink */ -- cgit