| /* ---------------------------------------------------------------------- |
| * 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 */ |