Steven Swenson
A program to automatically tune a guitar. Written by Justin Reidhead and Steven Swenson
Dependencies: FFT FrequencyFinder Motor NewTextLCD PinDetect mbed strings
Revision 13:948c7d19acb9, committed 2012-04-26
- Comitter:
- melangeaddict
- Date:
- Thu Apr 26 21:22:56 2012 +0000
- Parent:
- 12:03c189de6e2e
- Child:
- 14:fd59e7acf2e5
- Commit message:
- working on string steps;
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/main.cpp Wed Apr 25 04:09:25 2012 +0000
+++ b/main.cpp Thu Apr 26 21:22:56 2012 +0000
@@ -78,7 +78,7 @@
device_init();//Setup buttons and set global variables
-
+ float freq_acc[6] = {.7,.7,.6,.6,.5,.5};//Values to be between when tuning i.e., the first string is +-.7 to desired
int state=0,next_state=0;
int num_steps=0;
//float old_freq=0;
@@ -129,15 +129,14 @@
num_steps=get_steps(desired_freq, new_freq);
- if ((desired_freq-.5)<new_freq && (desired_freq+.5)>new_freq) {//We are within .5Hz of the desired frequency
+ if ((desired_freq-freq_acc[selected_string])<new_freq && (desired_freq+freq_acc[selected_string])>new_freq) {//We are within .5Hz of the desired frequency
new_freq=guitar.find_frequency();
- if ((desired_freq-.5)>new_freq || (desired_freq+.5)<new_freq) {//This checks the frequency again to make sure we are close
+ if ((desired_freq-freq_acc[selected_string])>new_freq || (desired_freq+freq_acc[selected_string])<new_freq) {//This checks the frequency again to make sure we are close
next_state=3;
break;
}
-
lcd.cls();
lcd.printf("String %d\ntuned",selected_string+1);
set_LED(1,0);//blue on
@@ -148,15 +147,16 @@
start_tuning=false;
output_menu();
setup_buttons();
+ new_freq=0;//Just to reset
next_state=0;
} else if ((desired_freq-.5)>new_freq) {//We are too low, and need to turn the string tigher
if (current_direction==down) {
- num_steps+=18;//For deadband
+ num_steps+=10;//For deadband
current_direction=up;
}
- lcd.cls();
- lcd.printf("Tuning up");
+ //lcd.cls();
+ //lcd.printf("Tuning up");
set_LED(1,1);//blue off
set_LED(2,0);//red on;
@@ -171,12 +171,12 @@
} else {//We are too high, and need to loosen the string
if (current_direction==up) {
- num_steps+=18;//For deadband
+ num_steps+=10;//For deadband
current_direction=down;
}
- lcd.cls();
- lcd.printf("Tuning down");
+ //lcd.cls();
+ //lcd.printf("Tuning down");
set_LED(1,1);//blue off
set_LED(2,1);//red off;
set_LED(3,0);//green on
@@ -203,6 +203,7 @@
break;
//-----------------------------------------
case 4://Winding mode
+
if (current_mode==winding_mode) {
if (wind_up) {
motor.motor_turn(up,5);//TODO:Adjust number of turns
@@ -345,6 +346,10 @@
//***************************************************
void mode() {
if (current_mode==tuning_mode) {
+ set_LED(2,0);//red off
+ set_LED(1,0);//blue on
+ set_LED(3,1);//green on
+
current_mode=winding_mode;
lcd.cls();
lcd.printf("Winding Mode");
@@ -352,6 +357,10 @@
lcd.cls();
lcd.printf("String for up\nPitch for down");
} else {
+ set_LED(2,1);//red off
+ set_LED(1,0);//blue on
+ set_LED(3,1);//green off
+
current_mode=tuning_mode;
lcd.cls();
lcd.printf("Tuning Mode");
@@ -374,18 +383,30 @@
//***************************************************
void wind_up_start() {
wind_up=true;
+ set_LED(2,0);//red on
+ set_LED(1,1);//blue off
+ set_LED(3,1);//green off
}
//***************************************************
void wind_up_stop() {
wind_up=false;
+ set_LED(2,0);//red off
+ set_LED(1,0);//blue on
+ set_LED(3,1);//green on
}
//***************************************************
void wind_down_start() {
wind_down=true;
+ set_LED(3,0);//green on
+ set_LED(1,1);//blue off
+ set_LED(2,1);// off
}
//***************************************************
void wind_down_stop() {
wind_down=false;
+ set_LED(2,0);//red off
+ set_LED(1,0);//blue on
+ set_LED(3,1);//green on
}
//***************************************************
void device_init() {
@@ -530,7 +551,7 @@
void LED_initialize() {
- float wait_time=0.3;
+ float wait_time=0.1;
/* ledBlue=1;//red
ledGreen=1;
ledRed=0;
@@ -622,65 +643,76 @@
return 60;
} else if (difference>3) {
return 35;
+ } else if (difference>2) {
+ return 20;
} else if (difference>1) {
return 15;
} else {
return 10;
}
case 4:
- if (difference>10) {
+ if (difference>5) {
return 60;
} else if (difference>3) {
return 40;
+ } else if (difference>2) {
+ return 30;
} else if (difference>1) {
return 23;
} else {
return 10;
}
case 3:
- if (difference>10) {
+ if (difference>5) {
return 40;
} else if (difference>3) {
return 25;
+ } else if (difference>2) {
+ return 20;
} else if (difference>1) {
return 15;
} else {
return 10;
}
case 2:
- if (difference>10) {
+ if (difference>5) {
return 33;
} else if (difference>3) {
- return 20;
+ return 23;
+ } else if (difference>2) {
+ return 17;
} else if (difference>1) {
- return 15;
+ return 12;
} else {
- return 10;
+ return 8;
}
case 1:
- if (difference>10) {
- return 30;
+ if (difference>5) {
+ return 35;
} else if (difference>3) {
+ return 25;
+ } else if (difference>2) {
return 20;
} else if (difference>1) {
return 10;
} else {
- return 7;
+ return 5;
}
case 0:
- if (difference>10) {
+ if (difference>8) {
+ return 30;
+ } else if (difference>6) {
return 20;
- } else if (difference>3) {
+ } else if (difference>4) {
return 15;
} else if (difference>1) {
- return 8;
+ return 10;
} else {
- return 4;
+ return 5;
}
default:
return 0;
- break;
}//end switch
}
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