main.cpp

00001 #include "mbed.h"
00002  
00003 PwmOut speaker(p26);
00004 AnalogIn pot1(p19);
00005 AnalogIn pot2(p20);
00006 DigitalIn joystickCenter(p14);
00007  
00008 int main() {
00009     /* note frequencies in Hz
00010     * rows: C C# D Eb E F F# G G# A Bb B
00011     * columns: 0 1 2 3 4 5 6 7 8
00012     */
00013     enum noteNames {A3, E4, GH4, A4, B4, CH5, DH5, E5, FH5, GH5, A5, B5, CH6, DH6, E6, FH6, GH6, A6, B6, CH7, DH7, E7, B7};
00014     float nt[23][9] = { {220.0}, {329.63}, {415.30}, {440.0}, {493.88}, {554.37}, {622.25}, {659.25}, {739.99}, {830.61}, {880.0}, {987.77}, {1108.73},
00015                         {1244.51}, {1318.51}, {1479.98}, {1661.22}, {1760.0}, {1975.53}, {2217.46}, {2489.02}, {2637.02}, {3951.07} };
00016     for (int i = 0; i < 12; i++) 
00017         for (int j = 1; j < 9; j++) 
00018             nt[i][j] = nt[i][j-1] * 2;
00019     
00020     while(1) {
00021         int scale = 0 * 8;
00022         float speed = 0.05 + pot1;
00023         float notesHere_with_you[] = {nt[E6][scale], 0, nt[E7][scale], 0, nt[DH7][scale], 0, nt[E6][scale], 0, nt[CH7][scale], 0, nt[A5][scale], 0,
00024                                 nt[B4][scale], 0, nt[FH5][scale], 0, nt[FH6][scale], 0, nt[E6][scale], 0, nt[DH6][scale], 0, nt[E5][scale], 0, nt[DH5][scale], 0,
00025                                 nt[CH5][scale], 0, nt[E7][scale], 0, nt[DH7][scale], 0, nt[E6][scale], 0, nt[CH7][scale], 0, nt[A5][scale], 0, nt[B4][scale], 0,
00026                                 nt[FH5][scale], 0, nt[B5][scale], 0, nt[E6][scale], 0, nt[DH6][scale], 0, nt[B5][scale], 0, nt[A3][scale], 0, nt[E4][scale], 0,
00027                                 nt[CH6][scale], 0, nt[E5][scale], 0, nt[DH6][scale], 0, nt[E5][scale], 0, nt[E6][scale], 0, nt[E5][scale], 0, nt[B5][scale], 0,
00028                                 nt[E4][scale], 0, nt[GH4][scale], 0, nt[B4][scale], 0, nt[E5][scale], 0, nt[A3][scale], 0, nt[E4][scale], 0, nt[CH6][scale], 0,
00029                                 nt[E5][scale], 0, nt[DH6][scale], 0, nt[E5][scale], 0, nt[E6][scale], 0, nt[E5][scale], 0, nt[E6][scale], 0, nt[FH6][scale], 0,
00030                                 nt[B6][scale], 0, nt[GH6][scale], 0, nt[E5][scale], 0, nt[GH6][scale], 0, nt[CH6][scale], 0, nt[DH6][scale], 0, nt[E6][scale], 0,
00031                                 nt[A3][scale], 0, nt[A4][scale], 0, nt[A3][scale], 0, nt[E4][scale], 0, nt[E5][scale], 0, nt[B5][scale], 0, nt[E6][scale], 0,
00032                                 nt[B6][scale], 0, nt[A6][scale], 0, nt[E7][scale], 0, nt[E6][scale], 0, nt[A6][scale], 0, nt[E7][scale], 0, nt[B7][scale], 0};
00033         float beatHere_with_you[] =  {2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 4, 0.5, 4, 0.5, 2, 0.5, 2, 0.5, 0.25, 0.5, 2.75, 0.5, 1, 0.5, 5, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5,
00034                                 2, 0.5, 4, 0.5, 4, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 4, 4, 0.5, 4, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 
00035                                 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 4, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 0.25, 0.5, 1.25, 0.5, 
00036                                 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 1, 0.5, 1, 0.5, 2, 0.5, 2, 0.5, 1, 0.5, 3, 0.5, 2, 0.5, 2, 0.5, 2, 0.5, 2, 0.5,
00037                                 2, 0.5, 2, 0.5, 2, 0.5, 2, 4, 4 };
00038         wait(4);
00039         
00040         for (int i = 0; i < 100; i++) {
00041             speaker.period(1 / (2*notesHere_with_you[i]) );
00042             speaker = 0.5;
00043             wait(speed * beatHere_with_you[i]);
00044         }
00045         if (joystickCenter) // press joystick center to stop playing
00046             break;
00047     }
00048 }