Ken Parish / Mbed 2 deprecated USBMIDI_Buzzer2-array

mbed working as a midi device through usb D-, D+

Dependencies:   USBDevice beep mbed

main.cpp@0:f24bc002bd2e, 2013-11-19 (annotated)

Committer:
ghostaudio
Date:
Tue Nov 19 03:23:23 2013 +0000
Revision:
0:f24bc002bd2e
Improvement on the beep method i used before

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ghostaudio 0:f24bc002bd2e 1 // Edited from the Hello World example for the USBMIDI library
ghostaudio 0:f24bc002bd2e 2 // to play notes from the PwmOut using beep.....
ghostaudio 0:f24bc002bd2e 3
ghostaudio 0:f24bc002bd2e 4 #include "mbed.h"
ghostaudio 0:f24bc002bd2e 5 #include "USBMIDI.h"
ghostaudio 0:f24bc002bd2e 6 #include "beep.h"
ghostaudio 0:f24bc002bd2e 7
ghostaudio 0:f24bc002bd2e 8 //USBMIDI object
ghostaudio 0:f24bc002bd2e 9 USBMIDI midi;
ghostaudio 0:f24bc002bd2e 10
ghostaudio 0:f24bc002bd2e 11 Beep buzzer(p22); // piezo one of two( this only needs one,
ghostaudio 0:f24bc002bd2e 12 Beep buzzer2(p21); // but piezo two made it more fun).....
ghostaudio 0:f24bc002bd2e 13 AnalogIn pot (p19); // and a potentiometer.....
ghostaudio 0:f24bc002bd2e 14
ghostaudio 0:f24bc002bd2e 15 int freq = 0;
ghostaudio 0:f24bc002bd2e 16
ghostaudio 0:f24bc002bd2e 17 // an array of frequencies from C2-C4 for freq.....
ghostaudio 0:f24bc002bd2e 18 int freqs[] = {261,277,293,311,329,349,369,391,415,440,466,493,523,
ghostaudio 0:f24bc002bd2e 19 554,587,622,659,698,739,783,830,880,932,987,1046};
ghostaudio 0:f24bc002bd2e 20
ghostaudio 0:f24bc002bd2e 21 //defining your midi notes as points in the array.....
ghostaudio 0:f24bc002bd2e 22 void show_message(MIDIMessage msg) {
ghostaudio 0:f24bc002bd2e 23 if (msg.type() == MIDIMessage::NoteOnType) {
ghostaudio 0:f24bc002bd2e 24 if (msg.velocity()!=0) {
ghostaudio 0:f24bc002bd2e 25 freq = freqs[(msg.key()-48)];
ghostaudio 0:f24bc002bd2e 26 }
ghostaudio 0:f24bc002bd2e 27 else {
ghostaudio 0:f24bc002bd2e 28 freq = 0;
ghostaudio 0:f24bc002bd2e 29 }
ghostaudio 0:f24bc002bd2e 30 }
ghostaudio 0:f24bc002bd2e 31 }
ghostaudio 0:f24bc002bd2e 32
ghostaudio 0:f24bc002bd2e 33 int main() {
ghostaudio 0:f24bc002bd2e 34
ghostaudio 0:f24bc002bd2e 35 // call back for midi messages received
ghostaudio 0:f24bc002bd2e 36 midi.attach(show_message);
ghostaudio 0:f24bc002bd2e 37
ghostaudio 0:f24bc002bd2e 38 while (1) {
ghostaudio 0:f24bc002bd2e 39
ghostaudio 0:f24bc002bd2e 40 float time = (pot/2); // assign the pot to the time...
ghostaudio 0:f24bc002bd2e 41 if (freq > 0){
ghostaudio 0:f24bc002bd2e 42 buzzer.beep(freq,0.1); // between this beep...
ghostaudio 0:f24bc002bd2e 43 wait (time);
ghostaudio 0:f24bc002bd2e 44 buzzer2.beep((freq*2),0.1); // and this beep (1 octave up).
ghostaudio 0:f24bc002bd2e 45 wait (time);
ghostaudio 0:f24bc002bd2e 46 }
ghostaudio 0:f24bc002bd2e 47
ghostaudio 0:f24bc002bd2e 48 wait (0.0001); // wait a millesecond and carry on...
ghostaudio 0:f24bc002bd2e 49 }
ghostaudio 0:f24bc002bd2e 50 }