CMSIS DSP Software Library: arm_matrix_example_f32.c Source File Main Page Modules Data Structures Files Examples File List Globals arm_matrix_example_f32.c Go to the documentation of this file.00001 /* ---------------------------------------------------------------------- 00002 * Copyright (C) 2010 ARM Limited. All rights reserved. 00003 * 00004 * $Date: 29. November 2010 00005 * $Revision: V1.0.3 00006 * 00007 * Project: CMSIS DSP Library 00008 * Title: arm_matrix_example_f32.c 00009 * 00010 * Description: Example code demonstrating least square fit to data 00011 * using matrix functions 00012 * 00013 * Target Processor: Cortex-M4/Cortex-M3 00014 * 00015 * 00016 * Version 1.0.3 2010/11/29 00017 * Re-organized the CMSIS folders and updated documentation. 00018 * 00019 * Version 1.0.1 2010/10/05 KK 00020 * Production release and review comments incorporated. 00021 * 00022 * Version 1.0.0 2010/09/20 KK 00023 * Production release and review comments incorporated. 00024 * ------------------------------------------------------------------- */ 00025 00077 #include "arm_math.h" 00078 #include "math_helper.h" 00079 00080 #define SNR_THRESHOLD 90 00081 00082 /* -------------------------------------------------------------------------------- 00083 * Test input data(Cycles) taken from FIR Q15 module for differant cases of blockSize 00084 * and tapSize 00085 * --------------------------------------------------------------------------------- */ 00086 00087 const float32_t B_f32[4] = 00088 { 00089 782.0, 7577.0, 470.0, 4505.0 00090 }; 00091 00092 /* -------------------------------------------------------------------------------- 00093 * Formula to fit is C1 + C2 * numTaps + C3 * blockSize + C4 * numTaps * blockSize 00094 * -------------------------------------------------------------------------------- */ 00095 00096 const float32_t A_f32[16] = 00097 { 00098 /* Const, numTaps, blockSize, numTaps*blockSize */ 00099 1.0, 32.0, 4.0, 128.0, 00100 1.0, 32.0, 64.0, 2048.0, 00101 1.0, 16.0, 4.0, 64.0, 00102 1.0, 16.0, 64.0, 1024.0, 00103 }; 00104 00105 00106 /* ---------------------------------------------------------------------- 00107 * Temporary buffers for storing intermediate values 00108 * ------------------------------------------------------------------- */ 00109 /* Transpose of A Buffer */ 00110 float32_t AT_f32[16]; 00111 /* (Transpose of A * A) Buffer */ 00112 float32_t ATMA_f32[16]; 00113 /* Inverse(Transpose of A * A) Buffer */ 00114 float32_t ATMAI_f32[16]; 00115 /* Test Output Buffer */ 00116 float32_t X_f32[4]; 00117 00118 /* ---------------------------------------------------------------------- 00119 * Reference ouput buffer C1, C2, C3 and C4 taken from MATLAB 00120 * ------------------------------------------------------------------- */ 00121 const float32_t xRef_f32[4] = {73.0, 8.0, 21.25, 2.875}; 00122 00123 float32_t snr; 00124 00125 00126 /* ---------------------------------------------------------------------- 00127 * Max magnitude FFT Bin test 00128 * ------------------------------------------------------------------- */ 00129 00130 int32_t main(void) 00131 { 00132 00133 arm_matrix_instance_f32 A; /* Matrix A Instance */ 00134 arm_matrix_instance_f32 AT; /* Matrix AT(A transpose) instance */ 00135 arm_matrix_instance_f32 ATMA; /* Matrix ATMA( AT multiply with A) instance */ 00136 arm_matrix_instance_f32 ATMAI; /* Matrix ATMAI(Inverse of ATMA) instance */ 00137 arm_matrix_instance_f32 B; /* Matrix B instance */ 00138 arm_matrix_instance_f32 X; /* Matrix X(Unknown Matrix) instance */ 00139 00140 uint32_t srcRows, srcColumns; /* Temporary variables */ 00141 arm_status status; 00142 00143 /* Initialise A Matrix Instance with numRows, numCols and data array(A_f32) */ 00144 srcRows = 4; 00145 srcColumns = 4; 00146 arm_mat_init_f32(&A, srcRows, srcColumns, (float32_t *)A_f32); 00147 00148 /* Initialise Matrix Instance AT with numRows, numCols and data array(AT_f32) */ 00149 srcRows = 4; 00150 srcColumns = 4; 00151 arm_mat_init_f32(&AT, srcRows, srcColumns, AT_f32); 00152 00153 /* calculation of A transpose */ 00154 status = arm_mat_trans_f32(&A, &AT); 00155 00156 00157 /* Initialise ATMA Matrix Instance with numRows, numCols and data array(ATMA_f32) */ 00158 srcRows = 4; 00159 srcColumns = 4; 00160 arm_mat_init_f32(&ATMA, srcRows, srcColumns, ATMA_f32); 00161 00162 /* calculation of AT Multiply with A */ 00163 status = arm_mat_mult_f32(&AT, &A, &ATMA); 00164 00165 /* Initialise ATMAI Matrix Instance with numRows, numCols and data array(ATMAI_f32) */ 00166 srcRows = 4; 00167 srcColumns = 4; 00168 arm_mat_init_f32(&ATMAI, srcRows, srcColumns, ATMAI_f32); 00169 00170 /* calculation of Inverse((Transpose(A) * A) */ 00171 status = arm_mat_inverse_f32(&ATMA, &ATMAI); 00172 00173 /* calculation of (Inverse((Transpose(A) * A)) * Transpose(A)) */ 00174 status = arm_mat_mult_f32(&ATMAI, &AT, &ATMA); 00175 00176 /* Initialise B Matrix Instance with numRows, numCols and data array(B_f32) */ 00177 srcRows = 4; 00178 srcColumns = 1; 00179 arm_mat_init_f32(&B, srcRows, srcColumns, (float32_t *)B_f32); 00180 00181 /* Initialise X Matrix Instance with numRows, numCols and data array(X_f32) */ 00182 srcRows = 4; 00183 srcColumns = 1; 00184 arm_mat_init_f32(&X, srcRows, srcColumns, X_f32); 00185 00186 /* calculation ((Inverse((Transpose(A) * A)) * Transpose(A)) * B) */ 00187 status = arm_mat_mult_f32(&ATMA, &B, &X); 00188 00189 /* Comparison of reference with test output */ 00190 snr = arm_snr_f32((float32_t *)xRef_f32, X_f32, 4); 00191 00192 /*------------------------------------------------------------------------------ 00193 * Initialise status depending on SNR calculations 00194 *------------------------------------------------------------------------------*/ 00195 if( snr > SNR_THRESHOLD) 00196 { 00197 status = ARM_MATH_SUCCESS; 00198 } 00199 else 00200 { 00201 status = ARM_MATH_TEST_FAILURE; 00202 } 00203 00204 00205 /* ---------------------------------------------------------------------- 00206 ** Loop here if the signals fail the PASS check. 00207 ** This denotes a test failure 00208 ** ------------------------------------------------------------------- */ 00209 if( status != ARM_MATH_SUCCESS) 00210 { 00211 while(1); 00212 } 00213 } 00214  All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Defines Generated on Mon Nov 29 2010 17:19:57 for CMSIS DSP Software Library by  1.7.2