Steven Swenson / Mbed 2 deprecated tuner

A program to automatically tune a guitar. Written by Justin Reidhead and Steven Swenson

Dependencies:   FFT FrequencyFinder Motor NewTextLCD PinDetect mbed strings

main.cpp@4:e370f322a697, 2012-04-16 (annotated)

Committer:
melangeaddict
Date:
Mon Apr 16 23:17:49 2012 +0000
Revision:
4:e370f322a697
Parent:
3:c672e782f19b
Child:
5:c0fd99f07536
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UserRevisionLine numberNew contents of line
melangeaddict 2:9c0a83c5ded5 1 #include "mbed.h"
melangeaddict 2:9c0a83c5ded5 2 #include "Motor.h"
melangeaddict 2:9c0a83c5ded5 3 #include "FrequencyFinder.h"
melangeaddict 2:9c0a83c5ded5 4 #include "NewTextLCD.h"
melangeaddict 2:9c0a83c5ded5 5 #include "PinDetect.h"
melangeaddict 2:9c0a83c5ded5 6 #include "strings.h"
melangeaddict 3:c672e782f19b 7 //#include "vector"
melangeaddict 2:9c0a83c5ded5 8
melangeaddict 3:c672e782f19b 9 //using namespace std;
melangeaddict 2:9c0a83c5ded5 10 //***************************************************
melangeaddict 2:9c0a83c5ded5 11 //***************Globals*****************************
melangeaddict 2:9c0a83c5ded5 12 PinDetect string_but(p11);
melangeaddict 3:c672e782f19b 13 PinDetect pitch_but(p12);//These are the buttons the user will interface with
melangeaddict 2:9c0a83c5ded5 14 PinDetect start_but(p13);
melangeaddict 2:9c0a83c5ded5 15 PinDetect mode_but(p14);
melangeaddict 2:9c0a83c5ded5 16
melangeaddict 3:c672e782f19b 17 DigitalOut led1(LED1);//For diagnostic purposes
melangeaddict 2:9c0a83c5ded5 18 DigitalOut led2(LED2);
melangeaddict 2:9c0a83c5ded5 19
melangeaddict 3:c672e782f19b 20 TextLCD lcd(p23,p24,p25,p26,p27,p28);//Our method of communication with LCD screen (rs e d4 d5 d6 d7)
melangeaddict 3:c672e782f19b 21 Motor motor(p20,p21,p22);//Setup for the motor (enable, direction, step)
melangeaddict 3:c672e782f19b 22 FrequencyFinder guitar(p19);//Interface to get data from guitar (input pin)
melangeaddict 2:9c0a83c5ded5 23
melangeaddict 3:c672e782f19b 24 short selected_string;//Holds on to the selected string
melangeaddict 3:c672e782f19b 25 bool current_mode;//Tuning mode or winding mode
melangeaddict 3:c672e782f19b 26 bool start_tuning;//Bool to tell whether to start the tuning process or not
melangeaddict 3:c672e782f19b 27 bool wind_up;//Bool for winding mode - turn motor up
melangeaddict 3:c672e782f19b 28 bool wind_down;//Bool for winding mode - turn motor down
melangeaddict 3:c672e782f19b 29 bool up, down;//To move the motor up or down
melangeaddict 2:9c0a83c5ded5 30
melangeaddict 3:c672e782f19b 31 //vector<strings> strings_array;//Holds strings objects - basically the frequency data for each string
melangeaddict 3:c672e782f19b 32 strings strings_array[6];
melangeaddict 2:9c0a83c5ded5 33
melangeaddict 2:9c0a83c5ded5 34 //***************************************************
melangeaddict 2:9c0a83c5ded5 35 //*****************constants*************************
melangeaddict 3:c672e782f19b 36 const bool tuning_mode=false;//For setting the mode to tuning or winding
melangeaddict 2:9c0a83c5ded5 37 const bool winding_mode=true;
melangeaddict 2:9c0a83c5ded5 38
melangeaddict 2:9c0a83c5ded5 39 //***************************************************
melangeaddict 2:9c0a83c5ded5 40 //******************prototypes***********************
melangeaddict 2:9c0a83c5ded5 41 void device_init();
melangeaddict 2:9c0a83c5ded5 42
melangeaddict 2:9c0a83c5ded5 43 void string_sel();
melangeaddict 2:9c0a83c5ded5 44 void pitch_sel();
melangeaddict 2:9c0a83c5ded5 45 void start();
melangeaddict 2:9c0a83c5ded5 46 void stop();
melangeaddict 2:9c0a83c5ded5 47 void mode();
melangeaddict 2:9c0a83c5ded5 48 void do_nothing();
melangeaddict 3:c672e782f19b 49 void wind_up_start();
melangeaddict 3:c672e782f19b 50 void wind_down_start();
melangeaddict 3:c672e782f19b 51 void wind_up_stop();
melangeaddict 3:c672e782f19b 52 void wind_down_stop();
melangeaddict 2:9c0a83c5ded5 53
melangeaddict 2:9c0a83c5ded5 54 void button_init();
melangeaddict 2:9c0a83c5ded5 55 void setup_buttons();
melangeaddict 2:9c0a83c5ded5 56 void output_menu();
melangeaddict 2:9c0a83c5ded5 57 void motor_calibration();
melangeaddict 2:9c0a83c5ded5 58 bool check_threshold(float);
melangeaddict 2:9c0a83c5ded5 59 //*************************************************
melangeaddict 2:9c0a83c5ded5 60 //*********************main************************
melangeaddict 2:9c0a83c5ded5 61 int main() {
melangeaddict 3:c672e782f19b 62 lcd.cls();//Clear the LCD
melangeaddict 3:c672e782f19b 63 lcd.printf("Perfect\n Pitch");//Modify to whatever we want to name this thing
melangeaddict 2:9c0a83c5ded5 64
melangeaddict 2:9c0a83c5ded5 65 wait(.5);
melangeaddict 2:9c0a83c5ded5 66
melangeaddict 3:c672e782f19b 67 device_init();//Setup buttons and set global variables
melangeaddict 3:c672e782f19b 68
melangeaddict 2:9c0a83c5ded5 69 int state=0,next_state=0;
melangeaddict 2:9c0a83c5ded5 70 //float old_freq=0;
melangeaddict 2:9c0a83c5ded5 71 float new_freq=0;
melangeaddict 2:9c0a83c5ded5 72 float desired_freq=0;
melangeaddict 2:9c0a83c5ded5 73 strings *temp=&strings_array[0];
melangeaddict 3:c672e782f19b 74
melangeaddict 3:c672e782f19b 75 output_menu();
melangeaddict 3:c672e782f19b 76
melangeaddict 2:9c0a83c5ded5 77 while (1) {
melangeaddict 2:9c0a83c5ded5 78 state=next_state;
melangeaddict 2:9c0a83c5ded5 79
melangeaddict 2:9c0a83c5ded5 80 switch (state) {
melangeaddict 2:9c0a83c5ded5 81 //------------------------------------
melangeaddict 2:9c0a83c5ded5 82 case 0://Stay here till the user selects the string and pitch
melangeaddict 2:9c0a83c5ded5 83 if (start_tuning==true) {
melangeaddict 2:9c0a83c5ded5 84 next_state=1;
melangeaddict 2:9c0a83c5ded5 85 } else {
melangeaddict 2:9c0a83c5ded5 86 next_state=0;
melangeaddict 3:c672e782f19b 87 //output_menu();
melangeaddict 2:9c0a83c5ded5 88 }
melangeaddict 2:9c0a83c5ded5 89 break;
melangeaddict 2:9c0a83c5ded5 90 //----------------------------------------
melangeaddict 2:9c0a83c5ded5 91 case 1://motor calibration state
melangeaddict 3:c672e782f19b 92 motor_calibration();//determine which direction is up and down for the motor
melangeaddict 2:9c0a83c5ded5 93 next_state=2;
melangeaddict 2:9c0a83c5ded5 94 break;
melangeaddict 2:9c0a83c5ded5 95 //-----------------------------------------
melangeaddict 2:9c0a83c5ded5 96 case 2://begin the actual tuning
melangeaddict 2:9c0a83c5ded5 97 temp=&strings_array[selected_string];
melangeaddict 3:c672e782f19b 98 desired_freq=temp->get_freq();//Get the desired frequency for the string selected
melangeaddict 2:9c0a83c5ded5 99
melangeaddict 2:9c0a83c5ded5 100 next_state=3;
melangeaddict 2:9c0a83c5ded5 101 break;
melangeaddict 2:9c0a83c5ded5 102 //-----------------------------------------
melangeaddict 3:c672e782f19b 103 case 3://Do the dirty work of tuning
melangeaddict 3:c672e782f19b 104 new_freq=guitar.find_frequency();//Get the current frequency of the string
melangeaddict 3:c672e782f19b 105 if (check_threshold(new_freq)) {//The check_threshold function makes sure the frequency is valid (less than 500 Hz)
melangeaddict 2:9c0a83c5ded5 106 if ((desired_freq-.5)<new_freq && (desired_freq+.5)>new_freq) {//We are within .5Hz of the desired frequency
melangeaddict 2:9c0a83c5ded5 107 lcd.cls();
melangeaddict 2:9c0a83c5ded5 108 lcd.printf("String %d\ntuned",selected_string);
melangeaddict 2:9c0a83c5ded5 109 wait(.5);
melangeaddict 2:9c0a83c5ded5 110
melangeaddict 2:9c0a83c5ded5 111 start_tuning=false;
melangeaddict 2:9c0a83c5ded5 112 next_state=0;
melangeaddict 3:c672e782f19b 113 } else if ((desired_freq-.5)>new_freq) {//We are too low, and need to turn the string tigher
melangeaddict 2:9c0a83c5ded5 114 //motor(up,# of steps);
melangeaddict 2:9c0a83c5ded5 115 next_state=3;
melangeaddict 3:c672e782f19b 116 } else {//We are too high, and need to loosen the string
melangeaddict 2:9c0a83c5ded5 117 //motor(down,# of steps);
melangeaddict 2:9c0a83c5ded5 118 next_state=3;
melangeaddict 2:9c0a83c5ded5 119 }
melangeaddict 2:9c0a83c5ded5 120 } else {
melangeaddict 2:9c0a83c5ded5 121 next_state=3;
melangeaddict 2:9c0a83c5ded5 122 }
melangeaddict 2:9c0a83c5ded5 123
melangeaddict 2:9c0a83c5ded5 124 //TODO:Determine number of steps per frequency change
melangeaddict 2:9c0a83c5ded5 125 //old_freq=new_freq;
melangeaddict 2:9c0a83c5ded5 126 break;
melangeaddict 2:9c0a83c5ded5 127 //-----------------------------------------
melangeaddict 3:c672e782f19b 128 case 4://Winding mode
melangeaddict 3:c672e782f19b 129 if (current_mode==winding_mode) {
melangeaddict 3:c672e782f19b 130 if (wind_up) {
melangeaddict 3:c672e782f19b 131 motor.motor_turn(up,5);//TODO:Adjust number of turns
melangeaddict 3:c672e782f19b 132 }
melangeaddict 3:c672e782f19b 133
melangeaddict 3:c672e782f19b 134 if (wind_down) {
melangeaddict 3:c672e782f19b 135 motor.motor_turn(down,5);//TODO:Adjust number of turns
melangeaddict 3:c672e782f19b 136 }
melangeaddict 3:c672e782f19b 137 next_state=4;
melangeaddict 3:c672e782f19b 138 } else {
melangeaddict 3:c672e782f19b 139 next_state=0;
melangeaddict 3:c672e782f19b 140 }
melangeaddict 3:c672e782f19b 141 break;
melangeaddict 2:9c0a83c5ded5 142 default:
melangeaddict 2:9c0a83c5ded5 143 break;
melangeaddict 3:c672e782f19b 144 }//end switch
melangeaddict 2:9c0a83c5ded5 145 wait_ms(5);
melangeaddict 2:9c0a83c5ded5 146
melangeaddict 2:9c0a83c5ded5 147 if (start_tuning==false) {//If the stop button is pressed, the state machine returns to user input
melangeaddict 2:9c0a83c5ded5 148 next_state=0;
melangeaddict 4:e370f322a697 149 //setup_buttons();
melangeaddict 4:e370f322a697 150 //output_menu();
melangeaddict 2:9c0a83c5ded5 151 }
melangeaddict 3:c672e782f19b 152
melangeaddict 3:c672e782f19b 153 if (current_mode==winding_mode) {//TODO:Debug this
melangeaddict 3:c672e782f19b 154 next_state=4;
melangeaddict 3:c672e782f19b 155 }
melangeaddict 3:c672e782f19b 156
melangeaddict 3:c672e782f19b 157 if (start_tuning) {
melangeaddict 3:c672e782f19b 158 lcd.cls();
melangeaddict 3:c672e782f19b 159 lcd.printf("Detected %f\nDesired %f",new_freq,desired_freq);
melangeaddict 3:c672e782f19b 160 }
melangeaddict 3:c672e782f19b 161
melangeaddict 3:c672e782f19b 162 }//end while
melangeaddict 2:9c0a83c5ded5 163
melangeaddict 2:9c0a83c5ded5 164 // return 0;
melangeaddict 2:9c0a83c5ded5 165 }
melangeaddict 2:9c0a83c5ded5 166
melangeaddict 2:9c0a83c5ded5 167 //***************************************************
melangeaddict 2:9c0a83c5ded5 168 //******************functions************************
melangeaddict 3:c672e782f19b 169 //Display the string and pitch selection menu
melangeaddict 2:9c0a83c5ded5 170 void output_menu() {
melangeaddict 2:9c0a83c5ded5 171 lcd.cls();
melangeaddict 4:e370f322a697 172 lcd.printf("Select String: %d",selected_string+1);
melangeaddict 4:e370f322a697 173
melangeaddict 3:c672e782f19b 174 lcd.locate(0,1);
melangeaddict 3:c672e782f19b 175 strings *temp=&strings_array[selected_string];
melangeaddict 3:c672e782f19b 176 lcd.printf("Select Pitch: ");
melangeaddict 4:e370f322a697 177 lcd.printf("%s",temp->get_note());//temp->get_note().c_str());TODO:Fix!!!!
melangeaddict 4:e370f322a697 178 wait(.5);
melangeaddict 2:9c0a83c5ded5 179 }
melangeaddict 2:9c0a83c5ded5 180
melangeaddict 2:9c0a83c5ded5 181 //***************************************************
melangeaddict 3:c672e782f19b 182 //Initialize the buttons
melangeaddict 2:9c0a83c5ded5 183 void button_init() {
melangeaddict 2:9c0a83c5ded5 184 string_but.mode( PullDown );
melangeaddict 2:9c0a83c5ded5 185 string_but.setSampleFrequency();
melangeaddict 2:9c0a83c5ded5 186
melangeaddict 2:9c0a83c5ded5 187 pitch_but.mode( PullDown );
melangeaddict 2:9c0a83c5ded5 188 pitch_but.setSampleFrequency();
melangeaddict 2:9c0a83c5ded5 189
melangeaddict 2:9c0a83c5ded5 190 start_but.mode( PullDown );
melangeaddict 2:9c0a83c5ded5 191 start_but.setSampleFrequency();
melangeaddict 2:9c0a83c5ded5 192
melangeaddict 2:9c0a83c5ded5 193 mode_but.mode( PullDown );
melangeaddict 2:9c0a83c5ded5 194 mode_but.setSampleFrequency();
melangeaddict 4:e370f322a697 195
melangeaddict 4:e370f322a697 196 setup_buttons();
melangeaddict 2:9c0a83c5ded5 197 }
melangeaddict 2:9c0a83c5ded5 198
melangeaddict 2:9c0a83c5ded5 199 //***************************************************
melangeaddict 3:c672e782f19b 200 //Depending on the current mode, the buttons do different things
melangeaddict 2:9c0a83c5ded5 201 void setup_buttons() {
melangeaddict 3:c672e782f19b 202 if (current_mode==tuning_mode) {//Tuning mode
melangeaddict 2:9c0a83c5ded5 203 string_but.attach_asserted(&string_sel);
melangeaddict 3:c672e782f19b 204 string_but.attach_deasserted(&do_nothing);
melangeaddict 2:9c0a83c5ded5 205 pitch_but.attach_asserted(&pitch_sel);
melangeaddict 3:c672e782f19b 206 pitch_but.attach_deasserted(&do_nothing);
melangeaddict 2:9c0a83c5ded5 207 start_but.attach_asserted(&start);
melangeaddict 2:9c0a83c5ded5 208 mode_but.attach_asserted(&mode);
melangeaddict 3:c672e782f19b 209 } else {//Winding mode
melangeaddict 3:c672e782f19b 210 string_but.attach_asserted(&wind_up_start);
melangeaddict 3:c672e782f19b 211 string_but.attach_deasserted(&wind_up_stop);
melangeaddict 3:c672e782f19b 212 pitch_but.attach_asserted(&wind_down_start);
melangeaddict 3:c672e782f19b 213 pitch_but.attach_deasserted(&wind_down_stop);
melangeaddict 2:9c0a83c5ded5 214 start_but.attach_asserted(&do_nothing);
melangeaddict 2:9c0a83c5ded5 215 mode_but.attach_asserted(&mode);
melangeaddict 2:9c0a83c5ded5 216 }
melangeaddict 2:9c0a83c5ded5 217 }
melangeaddict 2:9c0a83c5ded5 218 //***************************************************
melangeaddict 3:c672e782f19b 219 //Change the selected string - there are only six strings
melangeaddict 2:9c0a83c5ded5 220 void string_sel() {
melangeaddict 2:9c0a83c5ded5 221 selected_string++;
melangeaddict 4:e370f322a697 222 if (selected_string>5)
melangeaddict 4:e370f322a697 223 selected_string=0;
melangeaddict 2:9c0a83c5ded5 224
melangeaddict 2:9c0a83c5ded5 225 output_menu();
melangeaddict 2:9c0a83c5ded5 226 }
melangeaddict 2:9c0a83c5ded5 227 //***************************************************
melangeaddict 3:c672e782f19b 228 //Change the pitch of the selected string
melangeaddict 2:9c0a83c5ded5 229 void pitch_sel() {
melangeaddict 2:9c0a83c5ded5 230 strings *temp=&strings_array[selected_string];
melangeaddict 2:9c0a83c5ded5 231 temp->inc_index();
melangeaddict 2:9c0a83c5ded5 232
melangeaddict 2:9c0a83c5ded5 233 output_menu();
melangeaddict 2:9c0a83c5ded5 234 }
melangeaddict 2:9c0a83c5ded5 235 //***************************************************
melangeaddict 3:c672e782f19b 236 //Start the tuning process
melangeaddict 2:9c0a83c5ded5 237 void start() {
melangeaddict 2:9c0a83c5ded5 238 start_tuning=true;
melangeaddict 3:c672e782f19b 239
melangeaddict 3:c672e782f19b 240 string_but.attach_asserted(&do_nothing);//Disable the other buttons
melangeaddict 3:c672e782f19b 241 pitch_but.attach_asserted(&do_nothing);
melangeaddict 3:c672e782f19b 242 start_but.attach_asserted(&stop); //except for the start/stop button
melangeaddict 3:c672e782f19b 243 mode_but.attach_asserted(&do_nothing);
melangeaddict 2:9c0a83c5ded5 244 }
melangeaddict 2:9c0a83c5ded5 245 //***************************************************
melangeaddict 2:9c0a83c5ded5 246 void mode() {
melangeaddict 2:9c0a83c5ded5 247 if (current_mode==tuning_mode) {
melangeaddict 2:9c0a83c5ded5 248 current_mode=winding_mode;
melangeaddict 2:9c0a83c5ded5 249 lcd.cls();
melangeaddict 2:9c0a83c5ded5 250 lcd.printf("Winding Mode");
melangeaddict 4:e370f322a697 251 wait(1);
melangeaddict 4:e370f322a697 252 lcd.cls();
melangeaddict 4:e370f322a697 253 lcd.printf("Start for up\nStop for down");
melangeaddict 2:9c0a83c5ded5 254 } else {
melangeaddict 2:9c0a83c5ded5 255 current_mode=tuning_mode;
melangeaddict 2:9c0a83c5ded5 256 lcd.cls();
melangeaddict 2:9c0a83c5ded5 257 lcd.printf("Tuning Mode");
melangeaddict 3:c672e782f19b 258 wait(.5);
melangeaddict 4:e370f322a697 259 output_menu();
melangeaddict 2:9c0a83c5ded5 260 }
melangeaddict 3:c672e782f19b 261 setup_buttons();//Change the functions the buttons connect to
melangeaddict 2:9c0a83c5ded5 262 }
melangeaddict 2:9c0a83c5ded5 263 //***************************************************
melangeaddict 2:9c0a83c5ded5 264 void stop() {
melangeaddict 2:9c0a83c5ded5 265 start_tuning=false;
melangeaddict 2:9c0a83c5ded5 266 }
melangeaddict 2:9c0a83c5ded5 267 //***************************************************
melangeaddict 2:9c0a83c5ded5 268 void do_nothing() {
melangeaddict 2:9c0a83c5ded5 269 return;
melangeaddict 2:9c0a83c5ded5 270 }
melangeaddict 2:9c0a83c5ded5 271 //***************************************************
melangeaddict 3:c672e782f19b 272 void wind_up_start() {
melangeaddict 3:c672e782f19b 273 wind_up=true;
melangeaddict 2:9c0a83c5ded5 274 }
melangeaddict 2:9c0a83c5ded5 275 //***************************************************
melangeaddict 3:c672e782f19b 276 void wind_up_stop() {
melangeaddict 3:c672e782f19b 277 wind_up=false;
melangeaddict 3:c672e782f19b 278 }
melangeaddict 3:c672e782f19b 279 //***************************************************
melangeaddict 3:c672e782f19b 280 void wind_down_start() {
melangeaddict 3:c672e782f19b 281 wind_down=true;
melangeaddict 3:c672e782f19b 282 }
melangeaddict 3:c672e782f19b 283 //***************************************************
melangeaddict 3:c672e782f19b 284 void wind_down_stop() {
melangeaddict 3:c672e782f19b 285 wind_down=false;
melangeaddict 2:9c0a83c5ded5 286 }
melangeaddict 2:9c0a83c5ded5 287 //***************************************************
melangeaddict 2:9c0a83c5ded5 288 void device_init() {
melangeaddict 3:c672e782f19b 289
melangeaddict 2:9c0a83c5ded5 290 strings string1(1);
melangeaddict 2:9c0a83c5ded5 291 strings string2(2);
melangeaddict 2:9c0a83c5ded5 292 strings string3(3);
melangeaddict 2:9c0a83c5ded5 293 strings string4(4);
melangeaddict 2:9c0a83c5ded5 294 strings string5(5);
melangeaddict 2:9c0a83c5ded5 295 strings string6(6);
melangeaddict 2:9c0a83c5ded5 296
melangeaddict 3:c672e782f19b 297 strings_array[0]=string1;
melangeaddict 3:c672e782f19b 298 strings_array[1]=string2;
melangeaddict 3:c672e782f19b 299 strings_array[2]=string3;
melangeaddict 3:c672e782f19b 300 strings_array[3]=string4;
melangeaddict 3:c672e782f19b 301 strings_array[4]=string5;
melangeaddict 3:c672e782f19b 302 strings_array[5]=string6;
melangeaddict 3:c672e782f19b 303
melangeaddict 4:e370f322a697 304 selected_string=5;
melangeaddict 2:9c0a83c5ded5 305 current_mode=tuning_mode;
melangeaddict 2:9c0a83c5ded5 306 start_tuning=false;
melangeaddict 2:9c0a83c5ded5 307 up=true;
melangeaddict 2:9c0a83c5ded5 308 down=false;
melangeaddict 3:c672e782f19b 309 wind_up=true;
melangeaddict 2:9c0a83c5ded5 310
melangeaddict 2:9c0a83c5ded5 311 button_init();
melangeaddict 2:9c0a83c5ded5 312
melangeaddict 2:9c0a83c5ded5 313 output_menu();
melangeaddict 3:c672e782f19b 314
melangeaddict 2:9c0a83c5ded5 315 }
melangeaddict 2:9c0a83c5ded5 316 //***************************************************
melangeaddict 2:9c0a83c5ded5 317 void motor_calibration() {
melangeaddict 2:9c0a83c5ded5 318 lcd.cls();
melangeaddict 2:9c0a83c5ded5 319 lcd.printf("Calibrate Motor");
melangeaddict 3:c672e782f19b 320 wait(.5);
melangeaddict 2:9c0a83c5ded5 321
melangeaddict 2:9c0a83c5ded5 322 float freq=0, freq_up=0, freq_down=0;
melangeaddict 2:9c0a83c5ded5 323 bool done=false;
melangeaddict 2:9c0a83c5ded5 324 lcd.cls();
melangeaddict 2:9c0a83c5ded5 325 lcd.printf("Please pluck\nstring");
melangeaddict 4:e370f322a697 326 wait(1);
melangeaddict 2:9c0a83c5ded5 327
melangeaddict 2:9c0a83c5ded5 328 //motor.motor_turn(up,25)//TODO: Adjust the number of steps here
melangeaddict 2:9c0a83c5ded5 329 //On second thought, we don't need to tune up and down for this, we can find the current frequency
melangeaddict 2:9c0a83c5ded5 330 //and then turn the peg for the two frequencies!
melangeaddict 2:9c0a83c5ded5 331 while (!done) {
melangeaddict 2:9c0a83c5ded5 332 freq=guitar.find_frequency();
melangeaddict 2:9c0a83c5ded5 333
melangeaddict 2:9c0a83c5ded5 334 if (check_threshold(freq)) {
melangeaddict 3:c672e782f19b 335 lcd.cls();
melangeaddict 2:9c0a83c5ded5 336 freq_up=freq;
melangeaddict 2:9c0a83c5ded5 337 done=true;
melangeaddict 2:9c0a83c5ded5 338 }
melangeaddict 4:e370f322a697 339
melangeaddict 4:e370f322a697 340 if (start_tuning==false)
melangeaddict 4:e370f322a697 341 break;
melangeaddict 2:9c0a83c5ded5 342 }
melangeaddict 2:9c0a83c5ded5 343 motor.motor_turn(down,25);//TODO: Adjust the number of steps here
melangeaddict 2:9c0a83c5ded5 344 done=false;
melangeaddict 2:9c0a83c5ded5 345 while (!done) {
melangeaddict 2:9c0a83c5ded5 346 freq=guitar.find_frequency();
melangeaddict 2:9c0a83c5ded5 347
melangeaddict 2:9c0a83c5ded5 348 if (check_threshold(freq)) {
melangeaddict 3:c672e782f19b 349 lcd.cls();
melangeaddict 2:9c0a83c5ded5 350 freq_down=freq;
melangeaddict 2:9c0a83c5ded5 351 done=true;
melangeaddict 2:9c0a83c5ded5 352 }
melangeaddict 4:e370f322a697 353 if (start_tuning==false)
melangeaddict 4:e370f322a697 354 break;
melangeaddict 2:9c0a83c5ded5 355 }
melangeaddict 2:9c0a83c5ded5 356
melangeaddict 2:9c0a83c5ded5 357 if (freq_up<freq_down) {
melangeaddict 2:9c0a83c5ded5 358 down=true;
melangeaddict 2:9c0a83c5ded5 359 up=false;
melangeaddict 2:9c0a83c5ded5 360 }
melangeaddict 2:9c0a83c5ded5 361
melangeaddict 2:9c0a83c5ded5 362 lcd.cls();
melangeaddict 2:9c0a83c5ded5 363 lcd.printf("Calibration Done");
melangeaddict 4:e370f322a697 364
melangeaddict 4:e370f322a697 365 if (start_tuning==false) {
melangeaddict 4:e370f322a697 366 output_menu();
melangeaddict 4:e370f322a697 367 setup_buttons();
melangeaddict 4:e370f322a697 368 }
melangeaddict 2:9c0a83c5ded5 369 }
melangeaddict 2:9c0a83c5ded5 370 //**********************************************
melangeaddict 2:9c0a83c5ded5 371 bool check_threshold(float freq) {
melangeaddict 2:9c0a83c5ded5 372 if (freq>500) {
melangeaddict 2:9c0a83c5ded5 373 lcd.cls();
melangeaddict 2:9c0a83c5ded5 374 lcd.printf("Pluck string \nagain");
melangeaddict 2:9c0a83c5ded5 375 return false;
melangeaddict 2:9c0a83c5ded5 376 } else
melangeaddict 2:9c0a83c5ded5 377 return true;
melangeaddict 2:9c0a83c5ded5 378 }