/* ---------------------------------------------------------------------- * 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: *
sin(x) * sin(x) + cos(x) * cos(x) = 1* 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() * * Refer * \link arm_sin_cos_example_f32.c \endlink * */ /** \example arm_sin_cos_example_f32.c */ #include