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| 1 | +/* ---------------------------------------------------------------------- |
| 2 | + Copyright (C) 2010-2012 ARM Limited. All rights reserved. |
| 3 | +
|
| 4 | + $Date: 12. March 2014 |
| 5 | + $Revision: V1.4.3 |
| 6 | +
|
| 7 | + Project: CMSIS DSP Library |
| 8 | + Title: arm_sin_cos_example_f32.c |
| 9 | +
|
| 10 | + Description: Example code demonstrating sin and cos calculation of input signal. |
| 11 | +
|
| 12 | + Target Processor: Cortex-M4/Cortex-M3 |
| 13 | +
|
| 14 | + Redistribution and use in source and binary forms, with or without |
| 15 | + modification, are permitted provided that the following conditions |
| 16 | + are met: |
| 17 | + - Redistributions of source code must retain the above copyright |
| 18 | + notice, this list of conditions and the following disclaimer. |
| 19 | + - Redistributions in binary form must reproduce the above copyright |
| 20 | + notice, this list of conditions and the following disclaimer in |
| 21 | + the documentation and/or other materials provided with the |
| 22 | + distribution. |
| 23 | + - Neither the name of ARM LIMITED nor the names of its contributors |
| 24 | + may be used to endorse or promote products derived from this |
| 25 | + software without specific prior written permission. |
| 26 | +
|
| 27 | + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 28 | + "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 29 | + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 30 | + FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 31 | + COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 32 | + INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 33 | + BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 34 | + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 35 | + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 36 | + LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 37 | + ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 38 | + POSSIBILITY OF SUCH DAMAGE. |
| 39 | + -------------------------------------------------------------------- */ |
| 40 | + |
| 41 | +/** |
| 42 | + @ingroup groupExamples |
| 43 | +*/ |
| 44 | + |
| 45 | +/** |
| 46 | + @defgroup SinCosExample SineCosine Example |
| 47 | +
|
| 48 | + \par Description: |
| 49 | + \par |
| 50 | + Demonstrates the Pythagorean trignometric identity with the use of Cosine, Sine, Vector |
| 51 | + Multiplication, and Vector Addition functions. |
| 52 | +
|
| 53 | + \par Algorithm: |
| 54 | + \par |
| 55 | + Mathematically, the Pythagorean trignometric identity is defined by the following equation: |
| 56 | + <pre>sin(x) * sin(x) + cos(x) * cos(x) = 1</pre> |
| 57 | + where \c x is the angle in radians. |
| 58 | +
|
| 59 | + \par Block Diagram: |
| 60 | + \par |
| 61 | + \image html sinCos.gif |
| 62 | +
|
| 63 | + \par Variables Description: |
| 64 | + \par |
| 65 | + \li \c testInput_f32 array of input angle in radians |
| 66 | + \li \c testOutput stores sum of the squares of sine and cosine values of input angle |
| 67 | +
|
| 68 | + \par CMSIS DSP Software Library Functions Used: |
| 69 | + \par |
| 70 | + - arm_cos_f32() |
| 71 | + - arm_sin_f32() |
| 72 | + - arm_mult_f32() |
| 73 | + - arm_add_f32() |
| 74 | +
|
| 75 | + <b> Refer </b> |
| 76 | + \link arm_sin_cos_example_f32.c \endlink |
| 77 | +
|
| 78 | +*/ |
| 79 | + |
| 80 | + |
| 81 | +/** \example arm_sin_cos_example_f32.c |
| 82 | +*/ |
| 83 | + |
| 84 | +#include "CMSIS_DSP.h" |
| 85 | + |
| 86 | +/* ---------------------------------------------------------------------- |
| 87 | + Defines each of the tests performed |
| 88 | + ------------------------------------------------------------------- */ |
| 89 | +#define MAX_BLOCKSIZE 32 |
| 90 | +#define DELTA (0.0001f) |
| 91 | + |
| 92 | + |
| 93 | +/* ---------------------------------------------------------------------- |
| 94 | + Test input data for Floating point sin_cos example for 32-blockSize |
| 95 | + Generated by the MATLAB randn() function |
| 96 | + ------------------------------------------------------------------- */ |
| 97 | + |
| 98 | +const float32_t testInput_f32[MAX_BLOCKSIZE] = |
| 99 | +{ |
| 100 | + -1.244916875853235400, -4.793533929171324800, 0.360705030233248850, 0.827929644170887320, -3.299532218312426900, 3.427441903227623800, 3.422401784294607700, -0.108308165334010680, |
| 101 | + 0.941943896490312180, 0.502609575000365850, -0.537345278736373500, 2.088817392965764500, -1.693168684143455700, 6.283185307179590700, -0.392545884746175080, 0.327893095115825040, |
| 102 | + 3.070147440456292300, 0.170611405884662230, -0.275275082396073010, -2.395492805446796300, 0.847311163536506600, -3.845517018083148800, 2.055818378415868300, 4.672594161978930800, |
| 103 | + -1.990923030266425800, 2.469305197656249500, 3.609002606064021000, -4.586736582331667500, -4.147080139136136300, 1.643756718868359500, -1.150866392366494800, 1.985805026477433800 |
| 104 | + |
| 105 | + |
| 106 | +}; |
| 107 | + |
| 108 | +const float32_t testRefOutput_f32 = 1.000000000; |
| 109 | + |
| 110 | +/* ---------------------------------------------------------------------- |
| 111 | + Declare Global variables |
| 112 | + ------------------------------------------------------------------- */ |
| 113 | +uint32_t blockSize = 32; |
| 114 | +float32_t testOutput; |
| 115 | +float32_t cosOutput; |
| 116 | +float32_t sinOutput; |
| 117 | +float32_t cosSquareOutput; |
| 118 | +float32_t sinSquareOutput; |
| 119 | + |
| 120 | +/* ---------------------------------------------------------------------- |
| 121 | + Max magnitude FFT Bin test |
| 122 | + ------------------------------------------------------------------- */ |
| 123 | + |
| 124 | +arm_status status; |
| 125 | + |
| 126 | +void setup() { |
| 127 | + Serial.begin(9600); |
| 128 | +} |
| 129 | + |
| 130 | +void loop() { |
| 131 | + float32_t diff; |
| 132 | + uint32_t i; |
| 133 | + |
| 134 | + for (i = 0; i < blockSize; i++) { |
| 135 | + cosOutput = arm_cos_f32(testInput_f32[i]); |
| 136 | + sinOutput = arm_sin_f32(testInput_f32[i]); |
| 137 | + |
| 138 | + arm_mult_f32(&cosOutput, &cosOutput, &cosSquareOutput, 1); |
| 139 | + arm_mult_f32(&sinOutput, &sinOutput, &sinSquareOutput, 1); |
| 140 | + |
| 141 | + arm_add_f32(&cosSquareOutput, &sinSquareOutput, &testOutput, 1); |
| 142 | + |
| 143 | + /* absolute value of difference between ref and test */ |
| 144 | + diff = fabsf(testRefOutput_f32 - testOutput); |
| 145 | + |
| 146 | + /* Comparison of sin_cos value with reference */ |
| 147 | + status = (diff > DELTA) ? ARM_MATH_TEST_FAILURE : ARM_MATH_SUCCESS; |
| 148 | + |
| 149 | + if ( status == ARM_MATH_TEST_FAILURE) { |
| 150 | + break; |
| 151 | + } |
| 152 | + } |
| 153 | + |
| 154 | + if (status != ARM_MATH_SUCCESS) { |
| 155 | + Serial.println("FAILURE"); |
| 156 | + } |
| 157 | + else { |
| 158 | + Serial.println("SUCCESS"); |
| 159 | + } |
| 160 | + while (1) {}; |
| 161 | +} |
| 162 | + |
| 163 | +/** \endlink */ |
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