Collin Rusch
/
4180_Tuner
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Dependencies: mbed mbed-rtos 4DGL-uLCD-SE FFT PinDetect MAX4466
Revision 2:86aa2287412d, committed 2019-04-28
- Comitter:
- collinrusch
- Date:
- Sun Apr 28 20:46:45 2019 +0000
- Parent:
- 1:c5772cef09bc
- Commit message:
- 1.0
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/4DGL-uLCD-SE.lib Sun Apr 28 20:46:45 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/4180_1/code/4DGL-uLCD-SE/#2cb1845d7681
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FFT.lib Sun Apr 28 20:46:45 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/zchen78/code/FFT/#e7e724e172dc
--- a/MAX4466.lib Fri Oct 23 18:39:14 2015 +0000 +++ b/MAX4466.lib Sun Apr 28 20:46:45 2019 +0000 @@ -1,1 +1,1 @@ -https://developer.mbed.org/users/mgolino/code/MAX4466/#712373b300a2 +https://os.mbed.com/users/collinrusch/code/MAX4466/#0090c008b13e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PinDetect.lib Sun Apr 28 20:46:45 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/AjK/code/PinDetect/#cb3afc45028b
--- a/main.cpp Fri Oct 23 18:39:14 2015 +0000
+++ b/main.cpp Sun Apr 28 20:46:45 2019 +0000
@@ -1,14 +1,188 @@
#include "mbed.h"
#include "MAX4466.h"
-Serial pc (USBTX, USBRX);
+#include "FFT.h"
+#include "rtos.h"
+#include "uLCD_4DGL.h"
+#include "PinDetect.h"
+#include <string>
+#include <math.h>
-MAX4466 mic(p20);
+PinDetect pb1(p6);
+PinDetect pb2(p7);
+PinDetect pb3(p8);
+PinDetect pb4(p9);
+DigitalIn pb5 (p10);
+MAX4466 mic(p15);
+PwmOut speaker(p21);
+uLCD_4DGL uLCD(p28,p27,p30);
+Timer tim;
+
+#define MAX_NOTE 11
+#define MAX_OCT 8
+std::string notes[] = {"C","C#/Db","D","D#/Eb","E","F","F#/Gb","G","G#/Ab","A","A#/Bb","B"};
+float notefreqs[] = {16.35,17.32,18.35,19.45,20.60,21.93,23.12,24.50,25.96,27.50,29.14,30.87};
+
+volatile float readfreq = 0.00;
+volatile int octave = 0;
+volatile int indx = 0;
+
+void pb1_note_down(void) {
+ if(!pb1) {
+ indx -= 1;
+ if (indx < 0) {
+ indx = MAX_NOTE;
+ }
+ }
+}
+
+void pb2_note_up (void) {
+ if(!pb2) {
+ indx += 1;
+ if (indx > MAX_NOTE) {
+ indx = 0;
+ }
+ }
+}
+
+void pb3_oct_down (void) {
+ if(!pb3) {
+ octave -= 1;
+ if (octave < 0) {
+ octave = MAX_OCT;
+ }
+ }
+}
-int main()
-{
- while (1) {
- mic.volume_indicator();
- pc.printf("\n\r Level is %f", mic.sound_level());
+void pb4_oct_up (void) {
+ if(!pb4) {
+ octave += 1;
+ if (octave > MAX_OCT) {
+ octave = 0;
+ }
+ }
+}
+//Plays speaker at desired frequency selected by user
+void playspeaker(void const *arguments) {
+ while (1) {
+ speaker.period(1.0/(notefreqs[indx] * pow(2.0f,octave)));
+ speaker = 0.0;
+ while(!pb5) {
+ speaker = 0.5;
+ }
+ speaker = 0.0;
+ Thread::wait(100);
+ }
+}
+//Print frequencies of notes, detected freq, and circle display graphic to LCD
+void ulcd(void const *arguments) {
+ int cx;
+ int old_i = 0;
+ int old_oct= 0;
+ int i;
+ int oct;
+ while(1) {
+ i = indx;
+ oct = octave;
+ if (old_oct != oct) {
+ old_oct = oct;
+ uLCD.locate(1,7);
+ uLCD.printf(" ");
+ }
+ if (old_i != i) {
+ old_i = i;
+ uLCD.locate(1,7);
+ uLCD.printf(" ");
+ uLCD.locate(1,3);
+ uLCD.printf(" ");
+ }
+ uLCD.locate(1,3);
+ uLCD.printf("%s%D", notes[i], oct);
+ uLCD.locate(1,7);
+ uLCD.printf("%.2f Hz.", notefreqs[i] * pow(2.0f,oct));
+ uLCD.locate(1,14);
+ uLCD.printf("%.2f Hz.", readfreq);
+ uLCD.filled_circle(108, cx, 5, BLACK);
+ if (readfreq <= (notefreqs[i] * pow(2.0f,oct))+ 5 && readfreq >= (notefreqs[i] * pow(2.0f,oct)) - 5) {
+ cx = 64;
+ uLCD.line(88, 64, 128, 64, GREEN);
+ uLCD.filled_circle(108, cx, 5, GREEN);
+ } else {
+ cx = 64 + (notefreqs[i] * pow(2.0f,oct)) - readfreq;
+ if (cx < 0) {
+ cx = 0;
+ } else if (cx > 128) {
+ cx = 128;
+ }
+ uLCD.line(88, 64, 128, 64, RED);
+ uLCD.filled_circle(108, cx, 5, RED);
+ }
+ Thread::wait(10);
}
+}
+
+int main() {
+ //set up pindetect
+ pb1.mode(PullUp);
+ pb2.mode(PullUp);
+ pb3.mode(PullUp);
+ pb4.mode(PullUp);
+ pb5.mode(PullUp);
+ wait(0.01);
+ pb1.attach_deasserted(&pb1_note_down);
+ pb2.attach_deasserted(&pb2_note_up);
+ pb3.attach_deasserted(&pb3_oct_down);
+ pb4.attach_deasserted(&pb4_oct_up);
+ pb1.setSampleFrequency();
+ pb2.setSampleFrequency();
+ pb3.setSampleFrequency();
+ pb4.setSampleFrequency();
+ //set intial lcd values
+ uLCD.background_color(BLACK);
+ uLCD.baudrate(3000000);
+ uLCD.line(88, 0, 88, 128, WHITE);
+ uLCD.color(WHITE);
+ uLCD.locate(1,1);
+ uLCD.printf("Note:");
+ uLCD.locate(1,5);
+ uLCD.printf("Note Freq:");
+ uLCD.locate(1,12);
+ uLCD.printf("Read Freq:");
+ //launch threads
+ Thread ulcd_thread(&ulcd);
+ Thread speaker_thread(&playspeaker);
+ //set up main thread
+ int samples = 1024;
+ float arr [samples+1];
+ arr[0] = 0;
+ float max = 0;
+ float loc = 0;
+ float freq;
+ osThreadSetPriority(osThreadGetId(), osPriorityHigh);
+ //Loop and constantly be finding frequency of signal
+ while (1) {
+ tim.reset();
+ tim.start();
+ for (int i = 1; i<=samples; i++){
+ arr[i] = mic.instantlevel(); //Sample microphone at ~4 Khz
+ wait(.00025);
+ }
+ tim.stop();
+ freq = samples/tim.read();
+ //Turn sampled array into its fourier transform
+ vRealFFT(arr,samples);
+
+ //Loop through and find most apparent frequency of sampled signal
+ for(int i = 2; i<=samples; i++){
+ arr[i] *= arr[i];
+ if(max<arr[i]){
+ loc = freq/samples * i/2; //determine frequency by using sample rate,index in array
+ max = arr[i];
+ }
+ }
+ readfreq = loc;
+ max=0;
+ wait(0.25);
+ Thread::wait(100);
+ }
}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Sun Apr 28 20:46:45 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/teams/ST/code/mbed-rtos/#83895f30f8f2