Interactive Device Design / Mbed 2 deprecated idd_hw2_andrewhead_chordjoy

ChordJoy is a keyboard application that accepts chordal input from a set of digital ports, outputting letters and the chords that correspond to the piano keyboard keys the user has pressed.

Dependencies:   PinDetect_KL25Z mbed-rtos mbed

Fork of ChordJoy by Interactive Device Design

main.cpp@0:5ffec551c755, 2014-09-18 (annotated)

Committer:
andrewhead
Date:
Thu Sep 18 05:48:12 2014 +0000
Revision:
0:5ffec551c755
Child:
1:b6b866a58a87
Play all chords on 3 buzzers.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewhead 0:5ffec551c755 1 #include "mbed.h"
andrewhead 0:5ffec551c755 2 #include "PinDetect.h"
andrewhead 0:5ffec551c755 3 #include "rtos.h"
andrewhead 0:5ffec551c755 4
andrewhead 0:5ffec551c755 5 const int BUZZERS = 3;
andrewhead 0:5ffec551c755 6 const int LETTERS = 27;
andrewhead 0:5ffec551c755 7
andrewhead 0:5ffec551c755 8 Serial pc(USBTX, USBRX);
andrewhead 0:5ffec551c755 9 PinDetect buttons [3] = {
andrewhead 0:5ffec551c755 10 PinDetect(D15),
andrewhead 0:5ffec551c755 11 PinDetect(D14),
andrewhead 0:5ffec551c755 12 PinDetect(D13)
andrewhead 0:5ffec551c755 13 };
andrewhead 0:5ffec551c755 14
andrewhead 0:5ffec551c755 15 // Note: there are only THREE PWMs on the board. So this is all we can use
andrewhead 0:5ffec551c755 16 // for this particular method of sound output.
andrewhead 0:5ffec551c755 17 PwmOut buzzers [3] = {
andrewhead 0:5ffec551c755 18 PwmOut(D0),
andrewhead 0:5ffec551c755 19 PwmOut(D2),
andrewhead 0:5ffec551c755 20 PwmOut(D3)
andrewhead 0:5ffec551c755 21 };
andrewhead 0:5ffec551c755 22 // Periods of notes in microseconds
andrewhead 0:5ffec551c755 23 int notePeriods [8] = {
andrewhead 0:5ffec551c755 24 3818, // C4
andrewhead 0:5ffec551c755 25 3412, // D4
andrewhead 0:5ffec551c755 26 3030, // E4
andrewhead 0:5ffec551c755 27 2895, // F4
andrewhead 0:5ffec551c755 28 2551, // G4
andrewhead 0:5ffec551c755 29 2273, // A4
andrewhead 0:5ffec551c755 30 2024, // B4
andrewhead 0:5ffec551c755 31 10000000 // inaudible pitch
andrewhead 0:5ffec551c755 32 };
andrewhead 0:5ffec551c755 33 int chords [LETTERS][BUZZERS] = {
andrewhead 0:5ffec551c755 34 {0, 7, 7}, // single notes
andrewhead 0:5ffec551c755 35 {1, 7, 7},
andrewhead 0:5ffec551c755 36 {2, 7, 7},
andrewhead 0:5ffec551c755 37 {3, 7, 7},
andrewhead 0:5ffec551c755 38 {4, 7, 7},
andrewhead 0:5ffec551c755 39 {5, 7, 7},
andrewhead 0:5ffec551c755 40 {6, 7, 7},
andrewhead 0:5ffec551c755 41 {0, 2, 7}, // diads
andrewhead 0:5ffec551c755 42 {0, 3, 7},
andrewhead 0:5ffec551c755 43 {0, 4, 7},
andrewhead 0:5ffec551c755 44 {0, 5, 7},
andrewhead 0:5ffec551c755 45 {1, 3, 7},
andrewhead 0:5ffec551c755 46 {1, 4, 7},
andrewhead 0:5ffec551c755 47 {1, 5, 7},
andrewhead 0:5ffec551c755 48 {1, 6, 7},
andrewhead 0:5ffec551c755 49 {2, 4, 7},
andrewhead 0:5ffec551c755 50 {2, 5, 7},
andrewhead 0:5ffec551c755 51 {2, 6, 7},
andrewhead 0:5ffec551c755 52 {3, 4, 7},
andrewhead 0:5ffec551c755 53 {3, 5, 7},
andrewhead 0:5ffec551c755 54 {4, 6, 7},
andrewhead 0:5ffec551c755 55 {0, 2, 4}, // triads
andrewhead 0:5ffec551c755 56 {0, 2, 5},
andrewhead 0:5ffec551c755 57 {0, 3, 5},
andrewhead 0:5ffec551c755 58 {1, 4, 6},
andrewhead 0:5ffec551c755 59 {1, 3, 4},
andrewhead 0:5ffec551c755 60 {1, 3, 6}
andrewhead 0:5ffec551c755 61 };
andrewhead 0:5ffec551c755 62
andrewhead 0:5ffec551c755 63 void playAllChords(void) {
andrewhead 0:5ffec551c755 64 for (int i = 0; i < LETTERS; i++) {
andrewhead 0:5ffec551c755 65 int *chord = chords[i];
andrewhead 0:5ffec551c755 66 for (int j = 0; j < BUZZERS; j++) {
andrewhead 0:5ffec551c755 67 int noteIndex = chord[j];
andrewhead 0:5ffec551c755 68 if (noteIndex == 7) {
andrewhead 0:5ffec551c755 69 buzzers[j] = 0;
andrewhead 0:5ffec551c755 70 }
andrewhead 0:5ffec551c755 71 else {
andrewhead 0:5ffec551c755 72 buzzers[j] = .5f;
andrewhead 0:5ffec551c755 73 int period = notePeriods[noteIndex];
andrewhead 0:5ffec551c755 74 buzzers[j].period_us(period);
andrewhead 0:5ffec551c755 75 }
andrewhead 0:5ffec551c755 76 }
andrewhead 0:5ffec551c755 77 wait_ms(1000);
andrewhead 0:5ffec551c755 78 }
andrewhead 0:5ffec551c755 79 }
andrewhead 0:5ffec551c755 80
andrewhead 0:5ffec551c755 81 int main() {
andrewhead 0:5ffec551c755 82 // Initialize all duty cycles to off, so we hear nothing.
andrewhead 0:5ffec551c755 83 for (int i = 0; i < BUZZERS; i++) {
andrewhead 0:5ffec551c755 84 buzzers[i] = 0.0f;
andrewhead 0:5ffec551c755 85 }
andrewhead 0:5ffec551c755 86 pc.printf("%c\n", 97);
andrewhead 0:5ffec551c755 87 // playAllChords();
andrewhead 0:5ffec551c755 88 }