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 {C, Cs, D, Eb, E, F, Fs, G, Gs, A, Bb, B};
00014     float nt[12][9] = { {16.35}, {17.32}, {18.35}, {19.45}, {20.60}, {21.83},
00015                         {23.12}, {24.5}, {25.96}, {27.5}, {29.14}, {30.87} };
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 = pot2 * 8;
00022         float speed = 0.05 + pot1; // minimum wait is 50 ms
00023         float notesCiciban[] = {nt[A][1], 0, nt[A][1], 0, nt[A][1], 0,
00024                                 nt[F][1], 0, nt[C][2], 0, nt[A][1], 0,
00025                                 nt[F][1], 0, nt[C][2], 0, nt[A][1], 0, 
00026                                 nt[E][2], 0, nt[E][2], 0, nt[E][2], 0,
00027                                 nt[F][2], 0, nt[C][2], 0, nt[Gs][1], 0, 
00028                                 nt[F][1], 0, nt[C][2], 0, nt[A][1], 0,
00029                                 nt[A][2], 0, nt[A][1], 0, nt[A][1], 0,
00030                                 nt[A][2], 0, nt[Gs][2], 0, nt[G][2], 0,
00031                                 nt[Fs][2], 0, nt[F][2], 0, nt[Fs][2], 0,
00032                                 nt[Bb][1], 0, nt[Eb][2], 0, nt[D][2], 0,
00033                                 nt[Cs][2], 0, nt[C][2], 0, nt[B][1], 0,
00034                                 nt[C][2], 0, nt[F][1], 0, nt[Gs][1], 0,
00035                                 nt[F][1], 0, nt[Gs][1], 0, nt[C][2], 0,
00036                                 nt[A][1], 0, nt[C][2], 0, nt[E][2], 0,
00037                                 nt[A][2], 0, nt[A][1], 0, nt[A][1], 0,
00038                                 nt[A][2], 0, nt[Gs][2], 0, nt[G][2], 0,
00039                                 nt[Fs][2], 0, nt[F][2], 0, nt[Fs][2], 0,
00040                                 nt[Bb][1], 0, nt[Eb][2], 0, nt[D][2], 0,
00041                                 nt[Cs][2], 0,};
00042         float beatCiciban[] =  {1, 0.5, 1, 0.5, 1, 0.5,
00043                                 0.5, 0.5, 0.5, 0.5, 1, 0.5,
00044                                 0.5, 0.5, 0.5, 0.5, 2, 0.5, 
00045                                 1, 0.5, 1, 0.5, 1, 0.5, 
00046                                 0.5, 0.5, 0.5, 0.5, 1, 0.5,
00047                                 0.5, 0.5, 0.5, 0.5, 2, 0.5,
00048                                 1, 0.5, 0.5, 0.5, 0.5, 0.5,
00049                                 1, 0.5, 0.5, 0.5, 0.5, 0.5,
00050                                 0.25, 0.5, 0.25, 0.5, 0.25, 0.5,
00051                                 0.25, 0.5, 1, 0.5, 0.5, 0.5,
00052                                 0.5, 0.5, 0.25, 0.5, 0.25, 0.5,
00053                                 0.25, 0.5, 0.25, 0.5, 1, 0.5,
00054                                 0.5, 0.5, 0.5, 0.5, 1, 0.5,
00055                                 0.5, 0.5, 0.5, 0.5, 2, 0.5,
00056                                 1, 0.5, 0.5, 0.5, 0.5, 0.5,
00057                                 1, 0.5, 0.5, 0.5, 0.5, 0.5,
00058                                 0.25, 0.5, 0.25, 0.5, 0.25, 0.5,
00059                                 0.25, 0.5, 1, 0.5, 0.5, 0.5,
00060                                 0.5, 0.5};
00061     
00062         for (int i = 0; i < 109; i++) {
00063             speaker.period(1 / (4*notesCiciban[i]) );
00064             speaker = 0.75;
00065             wait(speed * beatCiciban[i]);
00066         }
00067         if (joystickCenter) // press joystick center to stop playing
00068             break;
00069     }
00070 }