Nikollao Sulollari / Mbed 2 deprecated Fast_LIA_final

The project is a fast lock in amplifier (LIA) which can update its output at rate of 1000 measurements/s. It performs digital dual mixing and filtering to obtain a DC value proportional to the AC input signal.

Dependencies:   N5110 mbed

main.h@5:68719e34a4ce, 2017-09-22 (annotated)

Committer:
Nikollao
Date:
Fri Sep 22 09:28:39 2017 +0000
Revision:
5:68719e34a4ce
Parent:
3:dd4eb355f8d9 
Fast Lock In Amplifier published code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nikollao 0:4e20939af8bb 1 /**
Nikollao 0:4e20939af8bb 2 @file main.h
Nikollao 0:4e20939af8bb 3 @brief Header file contains functions and variables
Nikollao 0:4e20939af8bb 4 @brief Fast Lock-In Amplifier - AC to DC converter
Nikollao 0:4e20939af8bb 5 @brief Revision 1.0
Nikollao 0:4e20939af8bb 6 @author Nikollao Sulollari
Nikollao 0:4e20939af8bb 7 @Date 16/08/2017
Nikollao 0:4e20939af8bb 8 */
Nikollao 0:4e20939af8bb 9
Nikollao 0:4e20939af8bb 10 #ifndef MAIN_H
Nikollao 0:4e20939af8bb 11 #define MAIN_H
Nikollao 0:4e20939af8bb 12 #include "mbed.h"
Nikollao 1:bf693859586c 13 #include "N5110.h"
Nikollao 0:4e20939af8bb 14
Nikollao 0:4e20939af8bb 15 #define DIRECTION_TOLERANCE 0.05
Nikollao 0:4e20939af8bb 16
Nikollao 0:4e20939af8bb 17 /**
Nikollao 0:4e20939af8bb 18 @namespace aout
Nikollao 0:4e20939af8bb 19 @brief Analog output DC filtered value
Nikollao 0:4e20939af8bb 20 */
Nikollao 0:4e20939af8bb 21 AnalogOut aout(DAC0_OUT);
Nikollao 0:4e20939af8bb 22
Nikollao 0:4e20939af8bb 23 /**
Nikollao 0:4e20939af8bb 24 @namespace gpo
Nikollao 0:4e20939af8bb 25 @brief Digital output set the D0 pin High/Low
Nikollao 0:4e20939af8bb 26 */
Nikollao 0:4e20939af8bb 27 DigitalOut gpo(D0);
Nikollao 0:4e20939af8bb 28
Nikollao 0:4e20939af8bb 29 /**
Nikollao 0:4e20939af8bb 30 @namespace ain
Nikollao 0:4e20939af8bb 31 @brief analog input which is the signal from the bolometer (THz detector)
Nikollao 0:4e20939af8bb 32 */
Nikollao 1:bf693859586c 33 AnalogIn ain(A5);
Nikollao 0:4e20939af8bb 34
Nikollao 0:4e20939af8bb 35 /**
Nikollao 0:4e20939af8bb 36 @namespace dref
Nikollao 0:4e20939af8bb 37 @brief event triggered interrupt used to calculate the reference frequency
Nikollao 0:4e20939af8bb 38 */
Nikollao 0:4e20939af8bb 39 InterruptIn dref(D6);
Nikollao 0:4e20939af8bb 40
Nikollao 0:4e20939af8bb 41 /**
Nikollao 2:c9b24787d5e1 42 @namespace menu_ticker
Nikollao 2:c9b24787d5e1 43 @brief time-triggered interrupt to update the menu of the LIA
Nikollao 2:c9b24787d5e1 44 */
Nikollao 2:c9b24787d5e1 45 Ticker menu_ticker;
Nikollao 2:c9b24787d5e1 46
Nikollao 2:c9b24787d5e1 47 /**
Nikollao 0:4e20939af8bb 48 @namespace amp_ticker
Nikollao 1:bf693859586c 49 @brief time-triggered interrupt calculates the offset of the input signal
Nikollao 0:4e20939af8bb 50 */
Nikollao 0:4e20939af8bb 51 Ticker offset_ticker;
Nikollao 0:4e20939af8bb 52
Nikollao 0:4e20939af8bb 53 /**
Nikollao 0:4e20939af8bb 54 @namespace sample_ticker
Nikollao 0:4e20939af8bb 55 @brief time-triggered interrupt samples internal sine and cosine signals
Nikollao 0:4e20939af8bb 56 */
Nikollao 0:4e20939af8bb 57 Ticker sample_ticker;
Nikollao 0:4e20939af8bb 58
Nikollao 0:4e20939af8bb 59 /**
Nikollao 0:4e20939af8bb 60 @namespace output_ticker
Nikollao 0:4e20939af8bb 61 @brief time-triggered interrupt updates the output of Fast LIA
Nikollao 0:4e20939af8bb 62 */
Nikollao 0:4e20939af8bb 63 Ticker output_ticker;
Nikollao 0:4e20939af8bb 64
Nikollao 0:4e20939af8bb 65 /**
Nikollao 0:4e20939af8bb 66 @namespace period_timer
Nikollao 0:4e20939af8bb 67 @brief timer is used to calculate the frequency of the input square wave
Nikollao 0:4e20939af8bb 68 */
Nikollao 0:4e20939af8bb 69 Timer period_timer;
Nikollao 0:4e20939af8bb 70
Nikollao 0:4e20939af8bb 71
Nikollao 0:4e20939af8bb 72 /**
Nikollao 0:4e20939af8bb 73 @namespace period_timer
Nikollao 0:4e20939af8bb 74 @brief timer updates the output of the LIA depending on the time constant
Nikollao 0:4e20939af8bb 75 */
Nikollao 0:4e20939af8bb 76 Timer output_timer;
Nikollao 0:4e20939af8bb 77 /**
Nikollao 0:4e20939af8bb 78 @namespace lcd
Nikollao 0:4e20939af8bb 79 @brief object of the N5110 class
Nikollao 0:4e20939af8bb 80 */
Nikollao 1:bf693859586c 81 N5110 lcd(PTE26 , PTA0 , PTC4 , PTD0 , PTD2 , PTD1 , PTC3);
Nikollao 0:4e20939af8bb 82
Nikollao 0:4e20939af8bb 83
Nikollao 0:4e20939af8bb 84 /**
Nikollao 0:4e20939af8bb 85 @namespace pc
Nikollao 0:4e20939af8bb 86 @brief serial connection between mbed and pc
Nikollao 0:4e20939af8bb 87 */
Nikollao 0:4e20939af8bb 88 Serial pc(USBTX,USBRX);
Nikollao 0:4e20939af8bb 89
Nikollao 0:4e20939af8bb 90 /**
Nikollao 2:c9b24787d5e1 91 @namespace xPot
Nikollao 2:c9b24787d5e1 92 @brief read x-axis position from the value of the joystick
Nikollao 2:c9b24787d5e1 93 */
Nikollao 2:c9b24787d5e1 94 AnalogIn xPot(PTB2);
Nikollao 2:c9b24787d5e1 95
Nikollao 2:c9b24787d5e1 96 /**
Nikollao 2:c9b24787d5e1 97 @namespace yPot
Nikollao 2:c9b24787d5e1 98 @brief read y-axis position from the value of the joystick
Nikollao 2:c9b24787d5e1 99 */
Nikollao 2:c9b24787d5e1 100 AnalogIn yPot(PTB3);
Nikollao 2:c9b24787d5e1 101
Nikollao 2:c9b24787d5e1 102 /**
Nikollao 3:dd4eb355f8d9 103 @namespace joyButton
Nikollao 3:dd4eb355f8d9 104 @brief interrupt executes an event triggered task when joyButton is pressed
Nikollao 2:c9b24787d5e1 105 */
Nikollao 3:dd4eb355f8d9 106 InterruptIn joyButton(PTB11);
Nikollao 3:dd4eb355f8d9 107
Nikollao 3:dd4eb355f8d9 108 /**
Nikollao 3:dd4eb355f8d9 109 @namespace swButton
Nikollao 3:dd4eb355f8d9 110 @brief interrupt executes an event triggered task
Nikollao 3:dd4eb355f8d9 111 */
Nikollao 3:dd4eb355f8d9 112 InterruptIn swButton(PTB18);
Nikollao 2:c9b24787d5e1 113
Nikollao 2:c9b24787d5e1 114 /**
Nikollao 0:4e20939af8bb 115 @namespace DirectionName
Nikollao 0:4e20939af8bb 116 @brief define joystick's direction based on its x,y values
Nikollao 0:4e20939af8bb 117 */
Nikollao 0:4e20939af8bb 118 enum DirectionName {
Nikollao 0:4e20939af8bb 119 UP,
Nikollao 0:4e20939af8bb 120 DOWN,
Nikollao 0:4e20939af8bb 121 LEFT,
Nikollao 0:4e20939af8bb 122 RIGHT,
Nikollao 0:4e20939af8bb 123 CENTRE,
Nikollao 0:4e20939af8bb 124 };
Nikollao 0:4e20939af8bb 125
Nikollao 0:4e20939af8bb 126 /**
Nikollao 0:4e20939af8bb 127 @namespace Joystick
Nikollao 0:4e20939af8bb 128 @brief create strcut Joystick
Nikollao 0:4e20939af8bb 129 */
Nikollao 0:4e20939af8bb 130 typedef struct JoyStick Joystick;
Nikollao 0:4e20939af8bb 131 struct JoyStick {
Nikollao 0:4e20939af8bb 132 double x; /// current x value
Nikollao 0:4e20939af8bb 133 double x0; /// 'centred' x value
Nikollao 0:4e20939af8bb 134 double y; /// current y value
Nikollao 0:4e20939af8bb 135 double y0; /// 'centred' y value
Nikollao 0:4e20939af8bb 136 int button; /// button state (assume pull-down used, so 1 = pressed, 0 = unpressed)
Nikollao 0:4e20939af8bb 137 DirectionName direction; // current direction
Nikollao 0:4e20939af8bb 138 };
Nikollao 0:4e20939af8bb 139 /// create struct variable
Nikollao 0:4e20939af8bb 140 Joystick joystick;
Nikollao 0:4e20939af8bb 141
Nikollao 0:4e20939af8bb 142 /**
Nikollao 2:c9b24787d5e1 143 update position of joystick
Nikollao 2:c9b24787d5e1 144 */
Nikollao 2:c9b24787d5e1 145 void updateJoystick();
Nikollao 2:c9b24787d5e1 146
Nikollao 2:c9b24787d5e1 147 /**
Nikollao 2:c9b24787d5e1 148 set origin of joystick
Nikollao 2:c9b24787d5e1 149 */
Nikollao 2:c9b24787d5e1 150 void calibrateJoystick();
Nikollao 2:c9b24787d5e1 151
Nikollao 2:c9b24787d5e1 152 /**
Nikollao 0:4e20939af8bb 153 set-up serial port
Nikollao 0:4e20939af8bb 154 */
Nikollao 0:4e20939af8bb 155 void init_serial();
Nikollao 0:4e20939af8bb 156
Nikollao 0:4e20939af8bb 157 /**
Nikollao 2:c9b24787d5e1 158 initialise lcd
Nikollao 2:c9b24787d5e1 159 */
Nikollao 2:c9b24787d5e1 160 void lcd_intro();
Nikollao 2:c9b24787d5e1 161
Nikollao 2:c9b24787d5e1 162 /**
Nikollao 2:c9b24787d5e1 163 configure settings of the LIA, sensitivity (gain) and update output (speed)
Nikollao 0:4e20939af8bb 164 */
Nikollao 2:c9b24787d5e1 165 void settings_menu();
Nikollao 2:c9b24787d5e1 166
Nikollao 2:c9b24787d5e1 167 /**
Nikollao 3:dd4eb355f8d9 168 setup the position of the menu selector (circle)
Nikollao 3:dd4eb355f8d9 169 */
Nikollao 3:dd4eb355f8d9 170 void setup_selector();
Nikollao 3:dd4eb355f8d9 171
Nikollao 3:dd4eb355f8d9 172
Nikollao 3:dd4eb355f8d9 173 /**
Nikollao 3:dd4eb355f8d9 174 init the LIA menu
Nikollao 3:dd4eb355f8d9 175 */
Nikollao 3:dd4eb355f8d9 176 void init_LIA_menu();
Nikollao 3:dd4eb355f8d9 177
Nikollao 3:dd4eb355f8d9 178 /**
Nikollao 3:dd4eb355f8d9 179 joystick button pressed
Nikollao 3:dd4eb355f8d9 180 */
Nikollao 3:dd4eb355f8d9 181 void confirmationJoyButton();
Nikollao 3:dd4eb355f8d9 182
Nikollao 3:dd4eb355f8d9 183 /**
Nikollao 2:c9b24787d5e1 184 set a timeout interrupt to implement power-efficient delays
Nikollao 2:c9b24787d5e1 185 */
Nikollao 2:c9b24787d5e1 186 void timeout_isr();
Nikollao 2:c9b24787d5e1 187
Nikollao 2:c9b24787d5e1 188 /**
Nikollao 2:c9b24787d5e1 189 set a timeout interrupt to update the menu on screen
Nikollao 2:c9b24787d5e1 190 */
Nikollao 2:c9b24787d5e1 191 void menu_isr();
Nikollao 0:4e20939af8bb 192
Nikollao 0:4e20939af8bb 193 /**
Nikollao 3:dd4eb355f8d9 194 Event-triggered interrupt executes ISR when joystick button is pressed
Nikollao 3:dd4eb355f8d9 195 */
Nikollao 3:dd4eb355f8d9 196 void joyButton_isr();
Nikollao 3:dd4eb355f8d9 197
Nikollao 3:dd4eb355f8d9 198 /**
Nikollao 3:dd4eb355f8d9 199 Event-triggered interrupt executes ISR when joystick button is pressed
Nikollao 3:dd4eb355f8d9 200 */
Nikollao 3:dd4eb355f8d9 201 void swButton_isr();
Nikollao 3:dd4eb355f8d9 202
Nikollao 3:dd4eb355f8d9 203 /**
Nikollao 0:4e20939af8bb 204 use MCU in High Power Mode and set Core, ADC, and BUS clocks at max
Nikollao 0:4e20939af8bb 205 */
Nikollao 2:c9b24787d5e1 206
Nikollao 0:4e20939af8bb 207 void setupK64Fclocks();
Nikollao 0:4e20939af8bb 208
Nikollao 0:4e20939af8bb 209 /**
Nikollao 0:4e20939af8bb 210 initialise DAC pin, otherwise AnalogOut (dac0_out) does not work
Nikollao 0:4e20939af8bb 211 */
Nikollao 0:4e20939af8bb 212 void initDAC();
Nikollao 0:4e20939af8bb 213
Nikollao 0:4e20939af8bb 214 /**
Nikollao 0:4e20939af8bb 215 find the amplitude of the analog bolometer signal
Nikollao 0:4e20939af8bb 216 */
Nikollao 0:4e20939af8bb 217 double max(int points);
Nikollao 0:4e20939af8bb 218
Nikollao 0:4e20939af8bb 219 double mavg_filter(int filt_points);
Nikollao 0:4e20939af8bb 220
Nikollao 0:4e20939af8bb 221 /**
Nikollao 0:4e20939af8bb 222 performs digital mixing with refX and refY components
Nikollao 0:4e20939af8bb 223 */
Nikollao 0:4e20939af8bb 224 void digitalMix(double remove_offset);
Nikollao 0:4e20939af8bb 225
Nikollao 0:4e20939af8bb 226 /**
Nikollao 0:4e20939af8bb 227 ISR calculates the DigitalIn signal frequency
Nikollao 0:4e20939af8bb 228 */
Nikollao 0:4e20939af8bb 229 void voltageRise();
Nikollao 0:4e20939af8bb 230
Nikollao 0:4e20939af8bb 231 /**
Nikollao 0:4e20939af8bb 232 ISR calculates the offset of the bolometer signal
Nikollao 0:4e20939af8bb 233 */
Nikollao 0:4e20939af8bb 234 void offset_isr();
Nikollao 0:4e20939af8bb 235
Nikollao 1:bf693859586c 236 /**
Nikollao 1:bf693859586c 237 ISR updates the output of the LIA
Nikollao 1:bf693859586c 238 */
Nikollao 0:4e20939af8bb 239 void output_isr();
Nikollao 0:4e20939af8bb 240
Nikollao 1:bf693859586c 241 //double calculate_constant(double freq_ref);
Nikollao 0:4e20939af8bb 242
Nikollao 0:4e20939af8bb 243 /*!< used to assign the amplitude of the bolometer signal */
Nikollao 0:4e20939af8bb 244 volatile double amplitude = 0;
Nikollao 0:4e20939af8bb 245
Nikollao 0:4e20939af8bb 246 /*!< stores the period of the input digital signal */
Nikollao 0:4e20939af8bb 247 volatile double ref_period = 0;
Nikollao 0:4e20939af8bb 248
Nikollao 0:4e20939af8bb 249 /*!< stores the frequency of the input digital signal */
Nikollao 0:4e20939af8bb 250 volatile double ref_freq = 0;
Nikollao 0:4e20939af8bb 251
Nikollao 0:4e20939af8bb 252 /*!< counter is used to find take between two rises of digital signal*/
Nikollao 0:4e20939af8bb 253 volatile int g_counter = 1;
Nikollao 0:4e20939af8bb 254
Nikollao 0:4e20939af8bb 255 /*!< flag is set from ISR to find offset of the bolometer signal */
Nikollao 0:4e20939af8bb 256 volatile int g_offset_flag = 0;
Nikollao 0:4e20939af8bb 257
Nikollao 0:4e20939af8bb 258 /*!< sampling period to take n samples and find bolometer signal amplitude */
Nikollao 0:4e20939af8bb 259 volatile double amplitude_delay = 0;
Nikollao 0:4e20939af8bb 260
Nikollao 0:4e20939af8bb 261 /*!< flag used to update output */
Nikollao 0:4e20939af8bb 262 volatile int g_output_flag = 0;
Nikollao 0:4e20939af8bb 263
Nikollao 2:c9b24787d5e1 264 /*!< flag used to update menu */
Nikollao 2:c9b24787d5e1 265 volatile int g_menu_flag = 0;
Nikollao 2:c9b24787d5e1 266
Nikollao 3:dd4eb355f8d9 267 /*!< flag is set when joystick button is pressed */
Nikollao 3:dd4eb355f8d9 268 volatile int g_joyButton_flag = 0;
Nikollao 3:dd4eb355f8d9 269
Nikollao 3:dd4eb355f8d9 270 /*!< flag is set when joystick button is pressed */
Nikollao 3:dd4eb355f8d9 271 volatile int g_swButton_flag = 0;
Nikollao 3:dd4eb355f8d9 272
Nikollao 0:4e20939af8bb 273 /*!< flag used to sample internal sine/cosine signals */
Nikollao 0:4e20939af8bb 274 volatile int g_sample_flag = 0;
Nikollao 0:4e20939af8bb 275
Nikollao 3:dd4eb355f8d9 276 /*!< variable used to move the menu selector */
Nikollao 3:dd4eb355f8d9 277 volatile int menu_option = 0;
Nikollao 3:dd4eb355f8d9 278
Nikollao 3:dd4eb355f8d9 279 /*!< variable used to move the continue selector */
Nikollao 3:dd4eb355f8d9 280 volatile int save_option = 0;
Nikollao 3:dd4eb355f8d9 281
Nikollao 2:c9b24787d5e1 282 /*!< var is set to exit the menu */
Nikollao 2:c9b24787d5e1 283 volatile int exit_menu = 0;
Nikollao 2:c9b24787d5e1 284
Nikollao 2:c9b24787d5e1 285 /*!< var is used to set the output gain */
Nikollao 3:dd4eb355f8d9 286 volatile double var_gain = 1.0;
Nikollao 2:c9b24787d5e1 287
Nikollao 2:c9b24787d5e1 288 /*!< var is used to set the output speed */
Nikollao 3:dd4eb355f8d9 289 volatile double var_speed = 1.0;
Nikollao 2:c9b24787d5e1 290
Nikollao 0:4e20939af8bb 291 /*!< array stores the square root of X^2 and Y^2 */
Nikollao 0:4e20939af8bb 292 volatile double R[16];
Nikollao 0:4e20939af8bb 293
Nikollao 0:4e20939af8bb 294 /*!< store the bolometer signal and find max value */
Nikollao 0:4e20939af8bb 295 double bolometer_signal[8];
Nikollao 0:4e20939af8bb 296
Nikollao 0:4e20939af8bb 297 /*!< store the bolometer signal and find max value */
Nikollao 0:4e20939af8bb 298 double bol_signal;
Nikollao 0:4e20939af8bb 299 //int size = 16;
Nikollao 0:4e20939af8bb 300
Nikollao 0:4e20939af8bb 301 /*!< variable used if a sine/cosine of 8 discrete values is used */
Nikollao 0:4e20939af8bb 302 int samples8 = 8;
Nikollao 0:4e20939af8bb 303
Nikollao 0:4e20939af8bb 304 /*!< variable used if a sine/cosine of 17 discrete values is used */
Nikollao 0:4e20939af8bb 305 int samples16 = 16;
Nikollao 0:4e20939af8bb 306
Nikollao 0:4e20939af8bb 307 /*!< variable used if a sine/cosine of 32 discrete values is used */
Nikollao 0:4e20939af8bb 308 int samples32 = 32;
Nikollao 0:4e20939af8bb 309
Nikollao 0:4e20939af8bb 310 /*!< sampling frequency of the internal sine/cosine waves */
Nikollao 0:4e20939af8bb 311 double sample_freq = 0;
Nikollao 0:4e20939af8bb 312
Nikollao 0:4e20939af8bb 313 /*!< variable used to sample the internal sine/cosine waves */
Nikollao 0:4e20939af8bb 314 double sample_time = 0;
Nikollao 0:4e20939af8bb 315
Nikollao 0:4e20939af8bb 316 /*!< number of samples for the amplitude of the bolometer signal */
Nikollao 0:4e20939af8bb 317 int amp_points = 32;
Nikollao 0:4e20939af8bb 318
Nikollao 0:4e20939af8bb 319 /*!< sampling freq to find the amplitude of the bolomter signal */
Nikollao 0:4e20939af8bb 320 double delay_freq = 0;
Nikollao 0:4e20939af8bb 321
Nikollao 0:4e20939af8bb 322 /*!< read the timer and if it is equal to the time constant update output */
Nikollao 0:4e20939af8bb 323 double time_out = 0;
Nikollao 0:4e20939af8bb 324
Nikollao 0:4e20939af8bb 325 int filter_points = 500;
Nikollao 0:4e20939af8bb 326
Nikollao 0:4e20939af8bb 327 double offset = 0;
Nikollao 0:4e20939af8bb 328
Nikollao 0:4e20939af8bb 329 /*!< sine wave array with 32 values */
Nikollao 0:4e20939af8bb 330 static double sin_array32[32] = {0, 0.1951, 0.3827, 0.5556, 0.7071, 0.8315, 0.9239,
Nikollao 0:4e20939af8bb 331 0.9808, 1, 0.9808, 0.9239, 0.8315, 0.7071, 0.5556,
Nikollao 0:4e20939af8bb 332 0.3827, 0.1951, 0, -0.1951, -0.3827, -0.5556, -0.7071,
Nikollao 0:4e20939af8bb 333 -0.8315, -0.9239, -0.9808, -1, -0.9808, -0.9239, -0.8315,
Nikollao 0:4e20939af8bb 334 -0.7071, -0.5556, -0.3827, -0.1951
Nikollao 0:4e20939af8bb 335 };
Nikollao 0:4e20939af8bb 336
Nikollao 0:4e20939af8bb 337 /*!< cosine wave array with 32 values */
Nikollao 0:4e20939af8bb 338 static double cos_array32[32] = {1, 0.9808, 0.9239, 0.8315, 0.7071, 0.5556,
Nikollao 0:4e20939af8bb 339 0.3827, 0.1951, 0, -0.1951, -0.3827, -0.5556, -0.7071,
Nikollao 0:4e20939af8bb 340 -0.8315, -0.9239, -0.9808, -1, -0.9808, -0.9239, -0.8315,
Nikollao 0:4e20939af8bb 341 -0.7071, -0.5556, -0.3827, -0.1951, 0, 0.1951, 0.3827,
Nikollao 0:4e20939af8bb 342 0.5556, 0.7071, 0.8315, 0.9239, 0.9808
Nikollao 0:4e20939af8bb 343 };
Nikollao 0:4e20939af8bb 344
Nikollao 0:4e20939af8bb 345 /*!< sine wave array with 17 values */
Nikollao 0:4e20939af8bb 346 static double sin_array16[16] = {0, 0.3827, 0.7071, 0.9239, 1, 0.9239, 0.7071,
Nikollao 0:4e20939af8bb 347 0.3827, 0, -0.3827, -0.7071, -0.9239, -1, -0.9239
Nikollao 0:4e20939af8bb 348 ,-0.7071, -0.3827,
Nikollao 0:4e20939af8bb 349 };
Nikollao 0:4e20939af8bb 350
Nikollao 0:4e20939af8bb 351 /*!< sine wave array with delay and 16 values, used for testing output */
Nikollao 0:4e20939af8bb 352 static double sin_array16delay[16] = {0.7071, 0.9239, 1, 0.9239, 0.7071,
Nikollao 0:4e20939af8bb 353 0.3827, 0, -0.3827, -0.7071, -0.9239, -1, -0.9239
Nikollao 0:4e20939af8bb 354 ,-0.7071, -0.3827, 0, 0.3827
Nikollao 0:4e20939af8bb 355 };
Nikollao 0:4e20939af8bb 356
Nikollao 0:4e20939af8bb 357 /*!< cosine wave array with 17 values */
Nikollao 0:4e20939af8bb 358 static double cos_array16[16] = {1, 0.9239, 0.7071,
Nikollao 0:4e20939af8bb 359 0.3827, 0, -0.3827, -0.7071, -0.9239, -1, -0.9239
Nikollao 0:4e20939af8bb 360 ,-0.7071, -0.3827, 0, 0.3827, 0.7071, 0.9239,
Nikollao 0:4e20939af8bb 361 };
Nikollao 0:4e20939af8bb 362
Nikollao 0:4e20939af8bb 363 /*!< sine wave array with 8 values */
Nikollao 0:4e20939af8bb 364 static double sin_array8[8] = {0, 0.7071, 1, 0.7071, 0, -0.7071, -1, -0.7071};
Nikollao 0:4e20939af8bb 365
Nikollao 0:4e20939af8bb 366 /*!< cosine wave array with 8 values */
Nikollao 0:4e20939af8bb 367 static double cos_array8[8] = {1, 0.7071, 0, -0.7071, -1, -0.7071, 0, 0.7071};
Nikollao 0:4e20939af8bb 368
Nikollao 0:4e20939af8bb 369 #endif