FFT LED Display
this hurts
Dependencies: FFT
Diff: main.cpp
- Revision:
- 5:598d94b45bad
- Parent:
- 2:a6e81c45ef48
- Child:
- 6:d311a95f1e9b
diff -r a6e81c45ef48 -r 598d94b45bad main.cpp
--- a/main.cpp Thu Dec 03 00:33:19 2020 +0000
+++ b/main.cpp Thu Dec 03 01:34:44 2020 +0000
@@ -5,10 +5,11 @@
#include "Adafruit_GFX.h"
#include "rtos.h"
#include "FFT.h"
+#include <string>
SDFileSystem sd(p5, p6, p7, p8, "sd"); // SD card
-I2C i2c(p28, p27); // LED display
+I2C i2c(p28, p27); // LED display
Adafruit_8x8matrix matrix = Adafruit_8x8matrix(&i2c);
AnalogOut DACout(p18); // speaker
@@ -16,88 +17,97 @@
Mutex speaker_lock;
DigitalOut myled(LED1); // mbed LED
Serial pc (USBTX,USBRX);
+string dir; // "/sd/" + song + ".wav"
+string song;
+bool play;
#define BUFFER_SIZE 50
// delete later
/*int sample[12][8] = {
- 34085,32666,29810,29823,27514,24175,24468,32559,
- 36401,33075,29037,21933,20189,21751,20975,20087,
- 17530,27723,30891,21128,19982,15446,12413,13597,
- 15776,14233,15622,16334,15485,17136,16389,17954,
- 20349,18486,23377,34447,34400,34681,33107,31171,
- 30007,33640,37007,38136,39187,38169,51831,52041,
- 47831,48634,44189,43878,44743,46468,43170,47172,
- 53518,52294,54825,51992,49619,48147,47901,48413,
- 46049,49090,47590,46154,45423,41223,41782,54695,
- 57452,51210,52462,59096,56711,52268,49364,42865,
- 41483,37964,39215,35908,31570,28332,24492,23121,
+ 34085,32666,29810,29823,27514,24175,24468,32559,
+ 36401,33075,29037,21933,20189,21751,20975,20087,
+ 17530,27723,30891,21128,19982,15446,12413,13597,
+ 15776,14233,15622,16334,15485,17136,16389,17954,
+ 20349,18486,23377,34447,34400,34681,33107,31171,
+ 30007,33640,37007,38136,39187,38169,51831,52041,
+ 47831,48634,44189,43878,44743,46468,43170,47172,
+ 53518,52294,54825,51992,49619,48147,47901,48413,
+ 46049,49090,47590,46154,45423,41223,41782,54695,
+ 57452,51210,52462,59096,56711,52268,49364,42865,
+ 41483,37964,39215,35908,31570,28332,24492,23121,
22874,18154,15541,15263,12463,12198,13301,9951
};*/
// states for display output
-const int on[8][8] =
-{1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1};
+const int on[8][8] = {
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1
+};
-const int high[8][8] =
-{0, 0, 0, 1, 1, 0, 0, 0,
-0, 0, 0, 1, 1, 0, 0, 0,
-0, 0, 1, 1, 1, 1, 0, 0,
-0, 1, 1, 1, 1, 1, 1, 0,
-0, 1, 1, 1, 1, 1, 1, 0,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1};
+const int high[8][8] = {
+ 0, 0, 0, 1, 1, 0, 0, 0,
+ 0, 0, 0, 1, 1, 0, 0, 0,
+ 0, 0, 1, 1, 1, 1, 0, 0,
+ 0, 1, 1, 1, 1, 1, 1, 0,
+ 0, 1, 1, 1, 1, 1, 1, 0,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1
+};
-const int med[8][8] =
-{0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 1, 1, 0, 0, 0,
-0, 0, 1, 1, 1, 1, 0, 0,
-0, 0, 1, 1, 1, 1, 0, 0,
-0, 1, 1, 1, 1, 1, 1, 0,
-1, 1, 1, 1, 1, 1, 1, 1,
-1, 1, 1, 1, 1, 1, 1, 1};
+const int med[8][8] = {
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 1, 1, 0, 0, 0,
+ 0, 0, 1, 1, 1, 1, 0, 0,
+ 0, 0, 1, 1, 1, 1, 0, 0,
+ 0, 1, 1, 1, 1, 1, 1, 0,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1
+};
-const int low[8][8] =
-{0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 1, 1, 1, 1, 0, 0,
-0, 1, 1, 1, 1, 1, 1, 0,
-1, 1, 1, 1, 1, 1, 1, 1};
+const int low[8][8] = {
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 1, 1, 1, 1, 0, 0,
+ 0, 1, 1, 1, 1, 1, 1, 0,
+ 1, 1, 1, 1, 1, 1, 1, 1
+};
-const int off[8][8] =
-{0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0,
-0, 0, 0, 0, 0, 0, 0, 0};
+const int off[8][8] = {
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0
+};
-void display_fft(int sample[]) {
-
+void display_fft(int sample[])
+{
+
int state = 0;
int freq = 0;
matrix.begin(0x70);
-
- for (int a = 0; a < 50; a++) {
-
- freq = sample[a];
-
+
+ for (int a = 0; a < 50; a++) {
+
+ freq = sample[a];
+
// determine state based on the FFT output range
if (freq >= 0 && freq < 10000) {
state = 5; // OFF
@@ -109,8 +119,8 @@
state = 2; // HIGH
} else if (freq >= 55000) {
state = 1; // ON
- }
-
+ }
+
// switch statement based on the state
switch (state) {
case(1): // CASE HIGHEST
@@ -125,7 +135,7 @@
matrix.writeDisplay();
wait(1);
break;
-
+
case(2): // CASE HIGH
matrix.clear();
for (int i = 0; i < 8; i++) {
@@ -137,20 +147,20 @@
}
matrix.writeDisplay();
wait(1);
-
+
case(3): // CASE MEDIUM
matrix.clear();
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
if (med[i][j] == 1) {
- matrix.drawPixel(i, j, LED_ON);
+ matrix.drawPixel(i, j, LED_ON);
}
}
}
matrix.writeDisplay();
wait(1);
break;
-
+
case(4): // CASE LOW
matrix.clear();
for (int i = 0; i < 8; i++) {
@@ -163,7 +173,7 @@
matrix.writeDisplay();
wait(1);
break;
-
+
case(5): // CASE OFF
matrix.clear();
for (int i = 0; i < 8; i++) {
@@ -176,14 +186,14 @@
matrix.writeDisplay();
wait(1);
break;
-
+
default:
break;
- }
-
-
}
-
+
+
+ }
+
}
//Reads SD card and passes value to frequency display
@@ -194,64 +204,102 @@
pc.printf("Error opening file\n");
return;
}
-
+
int buffer[BUFFER_SIZE];
int buffer_index = 0;
int value;
pc.printf("Thread start\n");
- while(fscanf(fp,"%d,",&value) == 1){
- buffer[buffer_index] = value;
- buffer_index++;
- pc.printf("%d\n",value);
- buffer_index++;
- if(buffer_index == BUFFER_SIZE)
- {
- //fast fourier tranform function here
- display_fft(buffer);
- buffer_index = 0;
- memset(buffer,0,sizeof(buffer));
-
- }
+ while(fscanf(fp,"%d,",&value) == 1) {
+ buffer[buffer_index] = value;
+ buffer_index++;
+ pc.printf("%d\n",value);
+ buffer_index++;
+ if(buffer_index == BUFFER_SIZE) {
+ //fast fourier tranform function here
+ display_fft(buffer);
+ buffer_index = 0;
+ memset(buffer,0,sizeof(buffer));
+
+ }
}
-
+
fclose(fp);
}
void speaker_thread(void const* args)
{
- while(1)
- {
+ while(1) {
// check helper function for new song in GUI
// grab file here and put together string
// string song_title = "/sd/" + "" + ".wav";
-
-
+
+
/*
FILE *wave_file;
- wave_file=fopen("/sd/africa-toto.wav","r");
-
+ dir = "/sd/" + song + ".wav";
+ wave_file=fopen(dir.c_str(),"r");
+
speaker_lock.lock();
- waver.play(wave_file);
+ if (play)
+ {
+ waver.play(wave_file);
+ }
speaker_lock.unlock();
fclose(wave_file);
Thread::wait(100);
*/
}
}
-
+
int main()
{
-
+
Thread th1(speaker_thread);
Thread th2(display_thread);
-
+ char c;
while(1) {
myled = 1;
wait(0.2);
myled = 0;
wait(0.2);
+ while(!pc.readable()) {
+ Thread::wait(1);
+ }
+ if (pc.getc() == '!') {
+ c = pc.getc();
+ switch(c) {
+ case '1':
+ song = "africa-toto";
+ break;
+ case '2':
+ song = "around_the_world-atc";
+ break;
+ case '3':
+ song = "beautiful_life-ace_of_base";
+ break;
+ case '4':
+ song = "dont_speak-no_doubt";
+ break;
+ case '5':
+ song = "my-love";
+ break;
+ case '6':
+ song = "Song1_test";
+ break;
+ case 'P':
+ // wave_player plays
+ play = true;
+ break;
+ case 'S':
+ // wave_player stops
+ play = false;
+ break;
+ default:
+ break;
+ }
+ }
Thread::wait(100);
}
-
+
}
\ No newline at end of file