Samuel Mokrani
USBMIDI Hello World
main.cpp@0:7145560b8847, 2011-11-04 (annotated)
- Committer:
- samux
- Date:
- Fri Nov 04 11:44:41 2011 +0000
- Revision:
- 0:7145560b8847
- Child:
- 1:4108aa07d2a7
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| samux | 0:7145560b8847 | 1 | // Hello World example for the USBMIDI library |
| samux | 0:7145560b8847 | 2 | |
| samux | 0:7145560b8847 | 3 | #include "mbed.h" |
| samux | 0:7145560b8847 | 4 | #include "USBMIDI.h" |
| samux | 0:7145560b8847 | 5 | |
| samux | 0:7145560b8847 | 6 | USBMIDI midi; |
| samux | 0:7145560b8847 | 7 | |
| samux | 0:7145560b8847 | 8 | //Bus of buttons |
| samux | 0:7145560b8847 | 9 | BusInOut buttons(p21, p22, p23, p24, p25, p26, p29); |
| samux | 0:7145560b8847 | 10 | |
| samux | 0:7145560b8847 | 11 | int main() { |
| samux | 0:7145560b8847 | 12 | uint8_t p_bus = 0; |
| samux | 0:7145560b8847 | 13 | uint8_t bus = 0; |
| samux | 0:7145560b8847 | 14 | uint8_t add; |
| samux | 0:7145560b8847 | 15 | while (1) { |
| samux | 0:7145560b8847 | 16 | //if buttons state change, send a MIDI message |
| samux | 0:7145560b8847 | 17 | bus = buttons.read(); |
| samux | 0:7145560b8847 | 18 | if (bus != p_bus) { |
| samux | 0:7145560b8847 | 19 | p_bus = bus; |
| samux | 0:7145560b8847 | 20 | if (p_bus) { |
| samux | 0:7145560b8847 | 21 | for (int i = 0; i < 7; i++) { |
| samux | 0:7145560b8847 | 22 | add = (p_bus & (1 << i)) ? (i + 1) : 0; |
| samux | 0:7145560b8847 | 23 | if (add) { |
| samux | 0:7145560b8847 | 24 | midi.write(MIDIMessage::NoteOn(48 + add)); |
| samux | 0:7145560b8847 | 25 | midi.write(MIDIMessage::NoteOff(48 + add)); |
| samux | 0:7145560b8847 | 26 | } |
| samux | 0:7145560b8847 | 27 | } |
| samux | 0:7145560b8847 | 28 | } |
| samux | 0:7145560b8847 | 29 | } |
| samux | 0:7145560b8847 | 30 | wait(0.001); |
| samux | 0:7145560b8847 | 31 | } |
| samux | 0:7145560b8847 | 32 | } |