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 * @addtogroup groupExamples
43 * @{
44 *
45 * @defgroup SinCosExample SineCosine Example
46 *
47 * \par Description:
48 * \par
49 * Demonstrates the Pythagorean trignometric identity with the use of Cosine, Sine, Vector
50 * Multiplication, and Vector Addition functions.
51 *
52 * \par Algorithm:
53 * \par
54 * Mathematically, the Pythagorean trignometric identity is defined by the following equation:
55 * <pre>sin(x) * sin(x) + cos(x) * cos(x) = 1</pre>
56 * where \c x is the angle in radians.
57 *
58 * \par Block Diagram:
59 * \par
60 * \image html sinCos.gif
61 *
62 * \par Variables Description:
63 * \par
64 * \li \c testInput_f32 array of input angle in radians
65 * \li \c testOutput stores sum of the squares of sine and cosine values of input angle
66 *
67 * \par CMSIS DSP Software Library Functions Used:
68 * \par
69 * - arm_cos_f32()
70 * - arm_sin_f32()
71 * - arm_mult_f32()
72 * - arm_add_f32()
73 *
74 * <b> Refer </b>
75 * \link arm_sin_cos_example_f32.c \endlink
76 *
77 * \example arm_sin_cos_example_f32.c
78 *
79 * @} */
80
81 #include <math.h>
82 #include "arm_math.h"
83
84 #if defined(SEMIHOSTING)
85 #include <stdio.h>
86 #endif
87
88 /* ----------------------------------------------------------------------
89 * Defines each of the tests performed
90 * ------------------------------------------------------------------- */
91 #define MAX_BLOCKSIZE 32
92 #define DELTA (0.0001f)
93
94
95 /* ----------------------------------------------------------------------
96 * Test input data for Floating point sin_cos example for 32-blockSize
97 * Generated by the MATLAB randn() function
98 * ------------------------------------------------------------------- */
99
100 const float32_t testInput_f32[MAX_BLOCKSIZE] =
101 {
102 -1.244916875853235400, -4.793533929171324800, 0.360705030233248850, 0.827929644170887320, -3.299532218312426900, 3.427441903227623800, 3.422401784294607700, -0.108308165334010680,
103 0.941943896490312180, 0.502609575000365850, -0.537345278736373500, 2.088817392965764500, -1.693168684143455700, 6.283185307179590700, -0.392545884746175080, 0.327893095115825040,
104 3.070147440456292300, 0.170611405884662230, -0.275275082396073010, -2.395492805446796300, 0.847311163536506600, -3.845517018083148800, 2.055818378415868300, 4.672594161978930800,
105 -1.990923030266425800, 2.469305197656249500, 3.609002606064021000, -4.586736582331667500, -4.147080139136136300, 1.643756718868359500, -1.150866392366494800, 1.985805026477433800
106
107
108 };
109
110 const float32_t testRefOutput_f32 = 1.000000000;
111
112 /* ----------------------------------------------------------------------
113 * Declare Global variables
114 * ------------------------------------------------------------------- */
115 uint32_t blockSize = 32;
116 float32_t testOutput;
117 float32_t cosOutput;
118 float32_t sinOutput;
119 float32_t cosSquareOutput;
120 float32_t sinSquareOutput;
121
122 /* ----------------------------------------------------------------------
123 * Max magnitude FFT Bin test
124 * ------------------------------------------------------------------- */
125
126 arm_status status;
127
main(void)128 int32_t main(void)
129 {
130 float32_t diff;
131 uint32_t i;
132
133 for(i=0; i< blockSize; i++)
134 {
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 {
151 break;
152 }
153 }
154
155 if (status != ARM_MATH_SUCCESS)
156 {
157 #if defined (SEMIHOSTING)
158 printf("FAILURE\n");
159 #else
160 while (1); /* main function does not return */
161 #endif
162 }
163 else
164 {
165 #if defined (SEMIHOSTING)
166 printf("SUCCESS\n");
167 #else
168 while (1); /* main function does not return */
169 #endif
170 }
171
172 }
173
174 /** \endlink */
175
