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/*********************************************************************
This is an example for our nRF52 based Bluefruit LE modules
Pick one up today in the adafruit shop!
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
MIT license, check LICENSE for more information
All text above, and the splash screen below must be included in
any redistribution
*********************************************************************/
/* For BLE MIDI Setup
* https://learn.adafruit.com/wireless-untztrument-using-ble-midi/overview
*/
#include <bluefruit.h>
#include <MIDI.h>
BLEDis bledis;
BLEMidi blemidi;
// Create a new instance of the Arduino MIDI Library,
// and attach BluefruitLE MIDI as the transport.
MIDI_CREATE_BLE_INSTANCE(blemidi);
// Variable that holds the current position in the sequence.
int position = 0;
// Store example melody as an array of note values
byte note_sequence[] = {
74,78,81,86,90,93,98,102,57,61,66,69,73,78,81,85,88,92,97,100,97,92,88,85,81,78,
74,69,66,62,57,62,66,69,74,78,81,86,90,93,97,102,97,93,90,85,81,78,73,68,64,61,
56,61,64,68,74,78,81,86,90,93,98,102
};
void setup()
{
Serial.begin(115200);
while ( !Serial ) delay(10); // for nrf52840 with native usb
Serial.println("Adafruit Bluefruit52 MIDI over Bluetooth LE Example");
// Config the peripheral connection with maximum bandwidth
// more SRAM required by SoftDevice
// Note: All config***() function must be called before begin()
Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
Bluefruit.begin();
Bluefruit.setName("Bluefruit52 MIDI");
Bluefruit.setTxPower(4);
// Setup the on board blue LED to be enabled on CONNECT
Bluefruit.autoConnLed(true);
// Configure and Start Device Information Service
bledis.setManufacturer("Adafruit Industries");
bledis.setModel("Bluefruit Feather52");
bledis.begin();
// Initialize MIDI, and listen to all MIDI channels
// This will also call blemidi service's begin()
MIDI.begin(MIDI_CHANNEL_OMNI);
// Attach the handleNoteOn function to the MIDI Library. It will
// be called whenever the Bluefruit receives MIDI Note On messages.
MIDI.setHandleNoteOn(handleNoteOn);
// Do the same for MIDI Note Off messages.
MIDI.setHandleNoteOff(handleNoteOff);
// Set up and start advertising
startAdv();
// Start MIDI read loop
Scheduler.startLoop(midiRead);
}
void startAdv(void)
{
// Set General Discoverable Mode flag
Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
// Advertise TX Power
Bluefruit.Advertising.addTxPower();
// Advertise BLE MIDI Service
Bluefruit.Advertising.addService(blemidi);
// Secondary Scan Response packet (optional)
// Since there is no room for 'Name' in Advertising packet
Bluefruit.ScanResponse.addName();
/* Start Advertising
* - Enable auto advertising if disconnected
* - Interval: fast mode = 20 ms, slow mode = 152.5 ms
* - Timeout for fast mode is 30 seconds
* - Start(timeout) with timeout = 0 will advertise forever (until connected)
*
* For recommended advertising interval
* https://developer.apple.com/library/content/qa/qa1931/_index.html
*/
Bluefruit.Advertising.restartOnDisconnect(true);
Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode
Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds
}
void handleNoteOn(byte channel, byte pitch, byte velocity)
{
// Log when a note is pressed.
Serial.printf("Note on: channel = %d, pitch = %d, velocity - %d", channel, pitch, velocity);
Serial.println();
}
void handleNoteOff(byte channel, byte pitch, byte velocity)
{
// Log when a note is released.
Serial.printf("Note off: channel = %d, pitch = %d, velocity - %d", channel, pitch, velocity);
Serial.println();
}
void loop()
{
// Don't continue if we aren't connected.
if (! Bluefruit.connected()) {
return;
}
// Don't continue if the connected device isn't ready to receive messages.
if (! blemidi.notifyEnabled()) {
return;
}
// Setup variables for the current and previous
// positions in the note sequence.
int current = position;
int previous = position - 1;
// If we currently are at position 0, set the
// previous position to the last note in the sequence.
if (previous < 0) {
previous = sizeof(note_sequence) - 1;
}
// Send Note On for current position at full velocity (127) on channel 1.
MIDI.sendNoteOn(note_sequence[current], 127, 1);
// Send Note Off for previous note.
MIDI.sendNoteOff(note_sequence[previous], 0, 1);
// Increment position
position++;
// If we are at the end of the sequence, start over.
if (position >= sizeof(note_sequence)) {
position = 0;
}
delay(286);
}
void midiRead()
{
// Don't continue if we aren't connected.
if (! Bluefruit.connected()) {
return;
}
// Don't continue if the connected device isn't ready to receive messages.
if (! blemidi.notifyEnabled()) {
return;
}
// read any new MIDI messages
MIDI.read();
}
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