/* ----------------------------------------------------------------------
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* Copyright (C) 2010-2012 ARM Limited. All rights reserved.
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*
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* $Date: 12. March 2014
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* $Revision: V1.4.3
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*
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* Project: CMSIS DSP Library
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* Title: arm_sin_cos_example_f32.c
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*
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* Description: Example code demonstrating sin and cos calculation of input signal.
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*
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* Target Processor: Cortex-M4/Cortex-M3
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of ARM LIMITED nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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* -------------------------------------------------------------------- */
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/**
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* @ingroup groupExamples
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*/
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/**
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* @defgroup SinCosExample SineCosine Example
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*
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* \par Description:
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* \par
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* Demonstrates the Pythagorean trignometric identity with the use of Cosine, Sine, Vector
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* Multiplication, and Vector Addition functions.
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*
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* \par Algorithm:
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* \par
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* Mathematically, the Pythagorean trignometric identity is defined by the following equation:
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* <pre>sin(x) * sin(x) + cos(x) * cos(x) = 1</pre>
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* where \c x is the angle in radians.
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*
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* \par Block Diagram:
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* \par
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* \image html sinCos.gif
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*
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* \par Variables Description:
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* \par
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* \li \c testInput_f32 array of input angle in radians
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* \li \c testOutput stores sum of the squares of sine and cosine values of input angle
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*
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* \par CMSIS DSP Software Library Functions Used:
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* \par
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* - arm_cos_f32()
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* - arm_sin_f32()
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* - arm_mult_f32()
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* - arm_add_f32()
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*
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* <b> Refer </b>
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* \link arm_sin_cos_example_f32.c \endlink
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*
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*/
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/** \example arm_sin_cos_example_f32.c
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*/
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#include <math.h>
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#include "arm_math.h"
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/* ----------------------------------------------------------------------
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* Defines each of the tests performed
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* ------------------------------------------------------------------- */
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#define MAX_BLOCKSIZE 32
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#define DELTA (0.0001f)
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/* ----------------------------------------------------------------------
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* Test input data for Floating point sin_cos example for 32-blockSize
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* Generated by the MATLAB randn() function
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* ------------------------------------------------------------------- */
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const float32_t testInput_f32[MAX_BLOCKSIZE] =
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{
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-1.244916875853235400, -4.793533929171324800, 0.360705030233248850, 0.827929644170887320, -3.299532218312426900, 3.427441903227623800, 3.422401784294607700, -0.108308165334010680,
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0.941943896490312180, 0.502609575000365850, -0.537345278736373500, 2.088817392965764500, -1.693168684143455700, 6.283185307179590700, -0.392545884746175080, 0.327893095115825040,
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3.070147440456292300, 0.170611405884662230, -0.275275082396073010, -2.395492805446796300, 0.847311163536506600, -3.845517018083148800, 2.055818378415868300, 4.672594161978930800,
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-1.990923030266425800, 2.469305197656249500, 3.609002606064021000, -4.586736582331667500, -4.147080139136136300, 1.643756718868359500, -1.150866392366494800, 1.985805026477433800
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};
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const float32_t testRefOutput_f32 = 1.000000000;
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/* ----------------------------------------------------------------------
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* Declare Global variables
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* ------------------------------------------------------------------- */
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uint32_t blockSize = 32;
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float32_t testOutput;
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float32_t cosOutput;
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float32_t sinOutput;
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float32_t cosSquareOutput;
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float32_t sinSquareOutput;
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/* ----------------------------------------------------------------------
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* Max magnitude FFT Bin test
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* ------------------------------------------------------------------- */
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arm_status status;
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int32_t main(void)
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{
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float32_t diff;
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uint32_t i;
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for(i=0; i< blockSize; i++)
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{
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cosOutput = arm_cos_f32(testInput_f32[i]);
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sinOutput = arm_sin_f32(testInput_f32[i]);
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arm_mult_f32(&cosOutput, &cosOutput, &cosSquareOutput, 1);
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arm_mult_f32(&sinOutput, &sinOutput, &sinSquareOutput, 1);
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arm_add_f32(&cosSquareOutput, &sinSquareOutput, &testOutput, 1);
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/* absolute value of difference between ref and test */
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diff = fabsf(testRefOutput_f32 - testOutput);
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/* Comparison of sin_cos value with reference */
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if (diff > DELTA)
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{
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status = ARM_MATH_TEST_FAILURE;
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}
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if ( status == ARM_MATH_TEST_FAILURE)
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{
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while (1);
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}
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}
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while (1); /* main function does not return */
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}
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/** \endlink */
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