diff options
Diffstat (limited to 'Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example')
| -rw-r--r-- | Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_data.c | 308 | ||||
| -rw-r--r-- | Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c | 158 |
2 files changed, 466 insertions, 0 deletions
diff --git a/Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_data.c b/Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_data.c new file mode 100644 index 0000000..10f3e12 --- /dev/null +++ b/Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_data.c @@ -0,0 +1,308 @@ +/* ----------------------------------------------------------------------
+* 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_data.c
+*
+* Description: Data file used for example code
+*
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
+* 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.
+ * -------------------------------------------------------------------- */
+
+#include "arm_math.h"
+
+/* ----------------------------------------------------------------------
+Test Input signal contains 10KHz signal + Uniformly distributed white noise
+** ------------------------------------------------------------------- */
+
+float32_t testInput_f32_10khz[2048] =
+{
+-0.865129623056441, 0.000000000000000, -2.655020678073846, 0.000000000000000, 0.600664612949661, 0.000000000000000, 0.080378093886515, 0.000000000000000,
+-2.899160484012034, 0.000000000000000, 2.563004262857762, 0.000000000000000, 3.078328403304206, 0.000000000000000, 0.105906778385130, 0.000000000000000,
+0.048366940168201, 0.000000000000000, -0.145696461188734, 0.000000000000000, -0.023417155362879, 0.000000000000000, 2.127729174988954, 0.000000000000000,
+-1.176633086028377, 0.000000000000000, 3.690223557991855, 0.000000000000000, -0.622791766173194, 0.000000000000000, 0.722837373872203, 0.000000000000000,
+2.739754205367484, 0.000000000000000, -0.062610410524552, 0.000000000000000, -0.891296810967338, 0.000000000000000, -1.845872258871811, 0.000000000000000,
+1.195039415434387, 0.000000000000000, -2.177388969045026, 0.000000000000000, 1.078649103637905, 0.000000000000000, 2.570976050490193, 0.000000000000000,
+-1.383551403404574, 0.000000000000000, 2.392141424058873, 0.000000000000000, 2.858002843205065, 0.000000000000000, -3.682433899725536, 0.000000000000000,
+-3.488146646451150, 0.000000000000000, 1.323468578888120, 0.000000000000000, -0.099771155430726, 0.000000000000000, 1.561168082500454, 0.000000000000000,
+1.025026795103179, 0.000000000000000, 0.928841900171200, 0.000000000000000, 2.930499509864950, 0.000000000000000, 2.013349089766430, 0.000000000000000,
+2.381676148486737, 0.000000000000000, -3.081062307950236, 0.000000000000000, -0.389579115537544, 0.000000000000000, 0.181540149166620, 0.000000000000000,
+-2.601953341353208, 0.000000000000000, 0.333435137783218, 0.000000000000000, -2.812945856162965, 0.000000000000000, 2.649109640172910, 0.000000000000000,
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+-2.827721754659679, 0.000000000000000, -0.092438285279020, 0.000000000000000, -0.565844430675246, 0.000000000000000, -1.077916121691716, 0.000000000000000,
+-1.208665809504693, 0.000000000000000, -2.996014266381254, 0.000000000000000, 2.888573323402423, 0.000000000000000, 2.829507048720695, 0.000000000000000,
+-0.859177034120755, 0.000000000000000, -1.969302377743254, 0.000000000000000, 0.777437674525362, 0.000000000000000, -0.124910190157646, 0.000000000000000,
+0.129875493115290, 0.000000000000000, -4.192139262163992, 0.000000000000000, 3.023496047962126, 0.000000000000000, 1.149775163736637, 0.000000000000000,
+2.038151304801731, 0.000000000000000, 3.016122489841263, 0.000000000000000, -4.829481812137012, 0.000000000000000, -1.668436615909279, 0.000000000000000,
+0.958586784636918, 0.000000000000000, 1.550652410058678, 0.000000000000000, -1.456305257976716, 0.000000000000000, -0.079588392344731, 0.000000000000000,
+-2.453213599392345, 0.000000000000000, 0.296795909127105, 0.000000000000000, -0.253426616607643, 0.000000000000000, 1.418937160028195, 0.000000000000000,
+-1.672949529066915, 0.000000000000000, -1.620990298572947, 0.000000000000000, -1.085103073196045, 0.000000000000000, 0.738606361195386, 0.000000000000000,
+-2.097831202853255, 0.000000000000000, 2.711952282071310, 0.000000000000000, 1.498539238246888, 0.000000000000000, 1.317457282535915, 0.000000000000000,
+-0.302765938349717, 0.000000000000000, -0.044623707947201, 0.000000000000000, 2.337405215062395, 0.000000000000000, -3.980689173859100, 0.000000000000000,
+
+
+};
+
diff --git a/Blink/Drivers/CMSIS/DSP/Examples/ARM/arm_fft_bin_example/arm_fft_bin_example_f32.c b/Blink/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/Blink/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()
+ *
+ * <b> Refer </b>
+ * \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 */
|