arm_sin_cos_example_f32.c

/* ----------------------------------------------------------------------     
* Copyright (C) 2011 ARM Limited. All rights reserved. 
*     
* $Date:        15. December 2011   
* $Revision:    V2.0.0  
*     
* Project:      Cortex-R4 DSP Library 
* Title:        arm_sin_cos_example_f32.c         
*  
* Description:  Example code demonstrating sin and cos calculation of input signal. 
* 
* Target Processor:          Cortex-R4
*
* Version 2.0.0 2011/12/15
*     Final release. 
* 
* ---------------------------------------------------------------------------- */ 
 
#include <math.h>     
#include "arm_math.h" 
 
/* ---------------------------------------------------------------------- 
* Defines each of the tests performed 
* ------------------------------------------------------------------- */ 
#define MAX_BLOCKSIZE   32 
#define DELTA           (0.000001f) 
 
 
/* ---------------------------------------------------------------------- 
* 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); 
        } 
 
    } 
}