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/* ----------------------------------------------------------------------
* Copyright (C) 2010-2012 ARM Limited. All rights reserved.
*
* $Date: 12. March 2014
* $Revision: V1.4.3
*
* Project: CMSIS DSP Library
* Title: arm_sin_cos_example_f32.c
*
* Description: Example code demonstrating sin and cos calculation 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 SinCosExample SineCosine Example
*
* \par Description:
* \par
* Demonstrates the Pythagorean trignometric identity with the use of Cosine, Sine, Vector
* Multiplication, and Vector Addition functions.
*
* \par Algorithm:
* \par
* Mathematically, the Pythagorean trignometric identity is defined by the following equation:
* <pre>sin(x) * sin(x) + cos(x) * cos(x) = 1</pre>
* where \c x is the angle in radians.
*
* \par Block Diagram:
* \par
* \image html sinCos.gif
*
* \par Variables Description:
* \par
* \li \c testInput_f32 array of input angle in radians
* \li \c testOutput stores sum of the squares of sine and cosine values of input angle
*
* \par CMSIS DSP Software Library Functions Used:
* \par
* - arm_cos_f32()
* - arm_sin_f32()
* - arm_mult_f32()
* - arm_add_f32()
*
* <b> Refer </b>
* \link arm_sin_cos_example_f32.c \endlink
*
*/
/** \example arm_sin_cos_example_f32.c
*/
#include <math.h>
#include "arm_math.h"
/* ----------------------------------------------------------------------
* Defines each of the tests performed
* ------------------------------------------------------------------- */
#define MAX_BLOCKSIZE 32
#define DELTA (0.0001f)
/* ----------------------------------------------------------------------
* Test input data for Floating point sin_cos example for 32-blockSize
* Generated by the MATLAB randn() function
* ------------------------------------------------------------------- */
const float32_t testInput_f32[MAX_BLOCKSIZE] =
{
-1.244916875853235400, -4.793533929171324800, 0.360705030233248850, 0.827929644170887320, -3.299532218312426900, 3.427441903227623800, 3.422401784294607700, -0.108308165334010680,
0.941943896490312180, 0.502609575000365850, -0.537345278736373500, 2.088817392965764500, -1.693168684143455700, 6.283185307179590700, -0.392545884746175080, 0.327893095115825040,
3.070147440456292300, 0.170611405884662230, -0.275275082396073010, -2.395492805446796300, 0.847311163536506600, -3.845517018083148800, 2.055818378415868300, 4.672594161978930800,
-1.990923030266425800, 2.469305197656249500, 3.609002606064021000, -4.586736582331667500, -4.147080139136136300, 1.643756718868359500, -1.150866392366494800, 1.985805026477433800
};
const float32_t testRefOutput_f32 = 1.000000000;
/* ----------------------------------------------------------------------
* Declare Global variables
* ------------------------------------------------------------------- */
uint32_t blockSize = 32;
float32_t testOutput;
float32_t cosOutput;
float32_t sinOutput;
float32_t cosSquareOutput;
float32_t sinSquareOutput;
/* ----------------------------------------------------------------------
* Max magnitude FFT Bin test
* ------------------------------------------------------------------- */
arm_status status;
int32_t main(void)
{
float32_t diff;
uint32_t i;
for(i=0; i< blockSize; i++)
{
cosOutput = arm_cos_f32(testInput_f32[i]);
sinOutput = arm_sin_f32(testInput_f32[i]);
arm_mult_f32(&cosOutput, &cosOutput, &cosSquareOutput, 1);
arm_mult_f32(&sinOutput, &sinOutput, &sinSquareOutput, 1);
arm_add_f32(&cosSquareOutput, &sinSquareOutput, &testOutput, 1);
/* absolute value of difference between ref and test */
diff = fabsf(testRefOutput_f32 - testOutput);
/* Comparison of sin_cos value with reference */
if (diff > DELTA)
{
status = ARM_MATH_TEST_FAILURE;
}
if ( status == ARM_MATH_TEST_FAILURE)
{
while (1);
}
}
while (1); /* main function does not return */
}
/** \endlink */
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