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added initial support for nRF52, cleanup ESP32

This commit is contained in:
lathoub 2020-09-13 22:37:10 +02:00
parent ce874ad382
commit 7d5944f37a
6 changed files with 416 additions and 271 deletions
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4
examples/Basic_IO/Basic_IO.ino
View File

@ -1,11 +1,11 @@
#include <BLE-MIDI.h>
#include <hardware/BLE-MIDI_ESP32.h>
#include <hardware/ESP32.h>
// Simple tutorial on how to receive and send MIDI messages.
// Here, when receiving any message on channel 4, the Arduino
// will blink a led and play back a note for 1 second.
BLEMIDI_CREATE_DEFAULT_ESP32_INSTANCE()
BLEMIDI_CREATE_DEFAULT_INSTANCE()
void setup()
{

31
examples/MidiBle/MidiBle.ino
View File

@ -1,7 +1,8 @@
#include <BLE-MIDI.h>
#include <hardware/BLE-MIDI_ESP32.h>
#include <hardware/ESP32.h>
//#include <hardware/nRF52.h>
BLEMIDI_CREATE_DEFAULT_ESP32_INSTANCE()
BLEMIDI_CREATE_DEFAULT_INSTANCE()
unsigned long t0 = millis();
bool isConnected = false;
@ -15,13 +16,13 @@ void setup()
while (!Serial);
Serial.println("Booting");
MIDI.begin(1);
MIDI.begin();
BLEMIDI.onConnected(OnBleMidiConnected);
BLEMIDI.onDisconnected(OnBleMidiDisconnected);
BLEMIDI.setHandleConnected(OnConnected);
BLEMIDI.setHandleDisconnected(OnDisconnected);
MIDI.setHandleNoteOn(OnBleMidiNoteOn);
MIDI.setHandleNoteOff(OnBleMidiNoteOff);
MIDI.setHandleNoteOn(OnNoteOn);
MIDI.setHandleNoteOff(OnNoteOff);
Serial.println(F("Ready"));
}
@ -47,25 +48,25 @@ void loop()
// ====================================================================================
// -----------------------------------------------------------------------------
// rtpMIDI session. Device connected
// Device connected
// -----------------------------------------------------------------------------
void OnBleMidiConnected() {
void OnConnected() {
Serial.println(F("Connected"));
isConnected = true;
}
// -----------------------------------------------------------------------------
// rtpMIDI session. Device disconnected
// Device disconnected
// -----------------------------------------------------------------------------
void OnBleMidiDisconnected() {
void OnDisconnected() {
Serial.println(F("Disconnected"));
isConnected = false;
}
// -----------------------------------------------------------------------------
// received note on
// Received note on
// -----------------------------------------------------------------------------
void OnBleMidiNoteOn(byte channel, byte note, byte velocity) {
void OnNoteOn(byte channel, byte note, byte velocity) {
Serial.print(F("Incoming NoteOn from channel:"));
Serial.print(channel);
Serial.print(F(" note:"));
@ -76,9 +77,9 @@ void OnBleMidiNoteOn(byte channel, byte note, byte velocity) {
}
// -----------------------------------------------------------------------------
// received note off
// Received note off
// -----------------------------------------------------------------------------
void OnBleMidiNoteOff(byte channel, byte note, byte velocity) {
void OnNoteOff(byte channel, byte note, byte velocity) {
Serial.print(F("Incoming NoteOff from channel:"));
Serial.print(channel);
Serial.print(F(" note:"));

2
library.properties
View File

@ -7,4 +7,4 @@ paragraph=MIDI over Bluetooth Low Energy
category=Communication
url=https://github.com/lathoub/Arduino-BLE-MIDI
architectures=*
includes=BLEMIDI.h
includes=BLE-MIDI.h

31
src/BLE-MIDI.h
View File

@ -48,7 +48,7 @@ public:
// To communicate between the 2 cores.
// Core_0 runs here, core_1 runs the BLE stack
mRxQueue = xQueueCreate(Settings::MaxBufferSize, sizeof(uint8_t));
// mRxQueue = xQueueCreate(Settings::MaxBufferSize, sizeof(uint8_t));
}
bool beginTransmission(MidiType)
@ -86,7 +86,7 @@ public:
unsigned available()
{
uint8_t byte;
auto succes = xQueueReceive(mRxQueue, &byte, 0); // return immediately when the queue is empty
auto succes = mBleClass.available(&byte); // xQueueReceive(mRxQueue, &byte, 0); // return immediately when the queue is empty
if (!succes) return mRxIndex;
mRxBuffer[mRxIndex++] = byte;
@ -95,7 +95,7 @@ public:
}
public:
QueueHandle_t mRxQueue;
// QueueHandle_t mRxQueue;
protected:
/*
@ -161,11 +161,11 @@ public:
void(*_disconnectedCallback)() = nullptr;
public:
void onConnected(void(*fptr)()) {
void setHandleConnected(void(*fptr)()) {
_connectedCallback = fptr;
}
void onDisconnected(void(*fptr)()) {
void setHandleDisconnected(void(*fptr)()) {
_disconnectedCallback = fptr;
}
@ -173,23 +173,8 @@ public:
END_BLEMIDI_NAMESPACE
struct MySettings : public MIDI_NAMESPACE::DefaultSettings
{
struct MySettings : public MIDI_NAMESPACE::DefaultSettings
{
static const bool Use1ByteParsing = false;
};
};
/*! \brief Create an instance of the library
*/
#define BLEMIDI_CREATE_INSTANCE(Type, DeviceName, Name) \
BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32> BLE##Name(DeviceName); \
MIDI_NAMESPACE::MidiInterface<BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32>, MySettings> Name((BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32> &)BLE##Name);
/*! \brief Create an instance for ESP32 named <DeviceName>
*/
#define BLEMIDI_CREATE_ESP32_INSTANCE(DeviceName) \
BLEMIDI_CREATE_INSTANCE(BLEMIDI_NAMESPACE::BLEMIDI_ESP32, DeviceName, MIDI);
/*! \brief Create a default instance for ESP32 named BLE-MIDI
*/
#define BLEMIDI_CREATE_DEFAULT_ESP32_INSTANCE() \
BLEMIDI_CREATE_ESP32_INSTANCE("BLE-MIDI")

483
src/hardware/BLE-MIDI_ESP32.h → src/hardware/ESP32.h Executable file → Normal file
View File

@ -1,230 +1,253 @@
#pragma once
// Headers for ESP32 BLE
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#include <BLE2902.h>
BEGIN_BLEMIDI_NAMESPACE
class BLEMIDI_ESP32
{
private:
BLEServer* _server = nullptr;
BLEAdvertising* _advertising = nullptr;
BLECharacteristic* _characteristic = nullptr;
BLEMIDITransport<class BLEMIDI_ESP32>* _bleMidiTransport = nullptr;
public:
BLEMIDI_ESP32()
{
}
bool begin(const char*, BLEMIDITransport<class BLEMIDI_ESP32>*);
void write(uint8_t* buffer, size_t length)
{
_characteristic->setValue(buffer, length);
_characteristic->notify();
}
/*
The general form of a MIDI message follows:
n-byte MIDI Message
Byte 0 MIDI message Status byte, Bit 7 is Set to 1.
Bytes 1 to n-1 MIDI message Data bytes, if n > 1. Bit 7 is Set to 0
There are two types of MIDI messages that can appear in a single packet: full MIDI messages and
Running Status MIDI messages. Each is encoded differently.
A full MIDI message is simply the MIDI message with the Status byte included.
A Running Status MIDI message is a MIDI message with the Status byte omitted. Running Status
MIDI messages may only be placed in the data stream if the following criteria are met:
1. The original MIDI message is 2 bytes or greater and is not a System Common or System
Real-Time message.
2. The omitted Status byte matches the most recently preceding full MIDI message’s Status
byte within the same BLE packet.
In addition, the following rules apply with respect to Running Status:
1. A Running Status MIDI message is allowed within the packet after at least one full MIDI
message.
2. Every MIDI Status byte must be preceded by a timestamp byte. Running Status MIDI
messages may be preceded by a timestamp byte. If a Running Status MIDI message is not
preceded by a timestamp byte, the timestamp byte of the most recently preceding message
in the same packet is used.
3. System Common and System Real-Time messages do not cancel Running Status if
interspersed between Running Status MIDI messages. However, a timestamp byte must
precede the Running Status MIDI message that follows.
4. The end of a BLE packet does cancel Running Status.
In the MIDI 1.0 protocol, System Real-Time messages can be sent at any time and may be
inserted anywhere in a MIDI data stream, including between Status and Data bytes of any other
MIDI messages. In the MIDI BLE protocol, the System Real-Time messages must be deinterleaved
from other messages – except for System Exclusive messages.
*/
void receive(uint8_t* buffer, size_t length)
{
// Pointers used to search through payload.
uint8_t lPtr = 0;
uint8_t rPtr = 0;
// lastStatus used to capture runningStatus
uint8_t lastStatus;
// Decode first packet -- SHALL be "Full MIDI message"
lPtr = 2; //Start at first MIDI status -- SHALL be "MIDI status"
//While statement contains incrementing pointers and breaks when buffer size exceeded.
while (true)
{
lastStatus = buffer[lPtr];
if( (buffer[lPtr] < 0x80))
return; // Status message not present, bail
// Point to next non-data byte
rPtr = lPtr;
while( (buffer[rPtr + 1] < 0x80) && (rPtr < (length - 1)) )
rPtr++;
if (buffer[rPtr + 1] == 0xF7) rPtr++;
// look at l and r pointers and decode by size.
if( rPtr - lPtr < 1 ) {
// Time code or system
xQueueSend(_bleMidiTransport->mRxQueue, &lastStatus, portMAX_DELAY);
} else if( rPtr - lPtr < 2 ) {
xQueueSend(_bleMidiTransport->mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[lPtr + 1], portMAX_DELAY);
} else if( rPtr - lPtr < 3 ) {
xQueueSend(_bleMidiTransport->mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[lPtr + 1], portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[lPtr + 2], portMAX_DELAY);
} else {
// Too much data
// If not System Common or System Real-Time, send it as running status
switch(buffer[lPtr] & 0xF0)
{
case 0x80:
case 0x90:
case 0xA0:
case 0xB0:
case 0xE0:
for (auto i = lPtr; i < rPtr; i = i + 2)
{
xQueueSend(_bleMidiTransport->mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[i + 1], portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[i + 2], portMAX_DELAY);
}
break;
case 0xC0:
case 0xD0:
for (auto i = lPtr; i < rPtr; i = i + 1)
{
xQueueSend(_bleMidiTransport->mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[i + 1], portMAX_DELAY);
}
break;
case 0xF0:
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[lPtr], portMAX_DELAY);
for (auto i = lPtr; i < rPtr; i++)
xQueueSend(_bleMidiTransport->mRxQueue, &buffer[i + 1], portMAX_DELAY);
break;
default:
break;
}
}
// Point to next status
lPtr = rPtr + 2;
if(lPtr >= length)
return; //end of packet
}
}
void connected()
{
if (_bleMidiTransport->_connectedCallback)
_bleMidiTransport->_connectedCallback();
}
void disconnected()
{
if (_bleMidiTransport->_disconnectedCallback)
_bleMidiTransport->_disconnectedCallback();
}
};
class MyServerCallbacks: public BLEServerCallbacks {
public:
MyServerCallbacks(BLEMIDI_ESP32* bluetoothEsp32)
: _bluetoothEsp32(bluetoothEsp32) {
}
protected:
BLEMIDI_ESP32* _bluetoothEsp32 = nullptr;
void onConnect(BLEServer*) {
if (_bluetoothEsp32)
_bluetoothEsp32->connected();
};
void onDisconnect(BLEServer*) {
if (_bluetoothEsp32)
_bluetoothEsp32->disconnected();
}
};
class MyCharacteristicCallbacks: public BLECharacteristicCallbacks {
public:
MyCharacteristicCallbacks(BLEMIDI_ESP32* bluetoothEsp32)
: _bluetoothEsp32(bluetoothEsp32 ) {
}
protected:
BLEMIDI_ESP32* _bluetoothEsp32 = nullptr;
void onWrite(BLECharacteristic * characteristic) {
std::string rxValue = characteristic->getValue();
if (rxValue.length() > 0) {
_bluetoothEsp32->receive((uint8_t *)(rxValue.c_str()), rxValue.length());
}
}
};
bool BLEMIDI_ESP32::begin(const char* deviceName, BLEMIDITransport<class BLEMIDI_ESP32>* bleMidiTransport)
{
_bleMidiTransport = bleMidiTransport;
BLEDevice::init(deviceName);
_server = BLEDevice::createServer();
_server->setCallbacks(new MyServerCallbacks(this));
// Create the BLE Service
auto service = _server->createService(BLEUUID(SERVICE_UUID));
// Create a BLE Characteristic
_characteristic = service->createCharacteristic(
BLEUUID(CHARACTERISTIC_UUID),
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY |
BLECharacteristic::PROPERTY_WRITE_NR
);
// Add CCCD 0x2902 to allow notify
_characteristic->addDescriptor(new BLE2902());
_characteristic->setCallbacks(new MyCharacteristicCallbacks(this));
// Start the service
service->start();
auto advertisementData = BLEAdvertisementData();
advertisementData.setFlags(0x04);
advertisementData.setCompleteServices(BLEUUID(SERVICE_UUID));
advertisementData.setName(deviceName);
// Start advertising
_advertising = _server->getAdvertising();
_advertising->setAdvertisementData(advertisementData);
_advertising->start();
return true;
}
END_BLEMIDI_NAMESPACE
#pragma once
// Headers for ESP32 BLE
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#include <BLE2902.h>
BEGIN_BLEMIDI_NAMESPACE
class BLEMIDI_ESP32
{
private:
BLEServer* _server = nullptr;
BLEAdvertising* _advertising = nullptr;
BLECharacteristic* _characteristic = nullptr;
BLEMIDITransport<class BLEMIDI_ESP32>* _bleMidiTransport = nullptr;
protected:
QueueHandle_t mRxQueue;
public:
BLEMIDI_ESP32()
{
}
bool begin(const char*, BLEMIDITransport<class BLEMIDI_ESP32>*);
void write(uint8_t* buffer, size_t length)
{
_characteristic->setValue(buffer, length);
_characteristic->notify();
}
bool available(void *pvBuffer)
{
return xQueueReceive(mRxQueue, pvBuffer, 0); // return immediately when the queue is empty
}
/*
The general form of a MIDI message follows:
n-byte MIDI Message
Byte 0 MIDI message Status byte, Bit 7 is Set to 1.
Bytes 1 to n-1 MIDI message Data bytes, if n > 1. Bit 7 is Set to 0
There are two types of MIDI messages that can appear in a single packet: full MIDI messages and
Running Status MIDI messages. Each is encoded differently.
A full MIDI message is simply the MIDI message with the Status byte included.
A Running Status MIDI message is a MIDI message with the Status byte omitted. Running Status
MIDI messages may only be placed in the data stream if the following criteria are met:
1. The original MIDI message is 2 bytes or greater and is not a System Common or System
Real-Time message.
2. The omitted Status byte matches the most recently preceding full MIDI message’s Status
byte within the same BLE packet.
In addition, the following rules apply with respect to Running Status:
1. A Running Status MIDI message is allowed within the packet after at least one full MIDI
message.
2. Every MIDI Status byte must be preceded by a timestamp byte. Running Status MIDI
messages may be preceded by a timestamp byte. If a Running Status MIDI message is not
preceded by a timestamp byte, the timestamp byte of the most recently preceding message
in the same packet is used.
3. System Common and System Real-Time messages do not cancel Running Status if
interspersed between Running Status MIDI messages. However, a timestamp byte must
precede the Running Status MIDI message that follows.
4. The end of a BLE packet does cancel Running Status.
In the MIDI 1.0 protocol, System Real-Time messages can be sent at any time and may be
inserted anywhere in a MIDI data stream, including between Status and Data bytes of any other
MIDI messages. In the MIDI BLE protocol, the System Real-Time messages must be deinterleaved
from other messages – except for System Exclusive messages.
*/
void receive(uint8_t* buffer, size_t length)
{
// Pointers used to search through payload.
uint8_t lPtr = 0;
uint8_t rPtr = 0;
// lastStatus used to capture runningStatus
uint8_t lastStatus;
// Decode first packet -- SHALL be "Full MIDI message"
lPtr = 2; //Start at first MIDI status -- SHALL be "MIDI status"
//While statement contains incrementing pointers and breaks when buffer size exceeded.
while (true)
{
lastStatus = buffer[lPtr];
if( (buffer[lPtr] < 0x80))
return; // Status message not present, bail
// Point to next non-data byte
rPtr = lPtr;
while( (buffer[rPtr + 1] < 0x80) && (rPtr < (length - 1)) )
rPtr++;
if (buffer[rPtr + 1] == 0xF7) rPtr++;
// look at l and r pointers and decode by size.
if( rPtr - lPtr < 1 ) {
// Time code or system
xQueueSend(mRxQueue, &lastStatus, portMAX_DELAY);
} else if( rPtr - lPtr < 2 ) {
xQueueSend(mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[lPtr + 1], portMAX_DELAY);
} else if( rPtr - lPtr < 3 ) {
xQueueSend(mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[lPtr + 1], portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[lPtr + 2], portMAX_DELAY);
} else {
// Too much data
// If not System Common or System Real-Time, send it as running status
switch(buffer[lPtr] & 0xF0)
{
case 0x80:
case 0x90:
case 0xA0:
case 0xB0:
case 0xE0:
for (auto i = lPtr; i < rPtr; i = i + 2)
{
xQueueSend(mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[i + 1], portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[i + 2], portMAX_DELAY);
}
break;
case 0xC0:
case 0xD0:
for (auto i = lPtr; i < rPtr; i = i + 1)
{
xQueueSend(mRxQueue, &lastStatus, portMAX_DELAY);
xQueueSend(mRxQueue, &buffer[i + 1], portMAX_DELAY);
}
break;
case 0xF0:
xQueueSend(mRxQueue, &buffer[lPtr], portMAX_DELAY);
for (auto i = lPtr; i < rPtr; i++)
xQueueSend(mRxQueue, &buffer[i + 1], portMAX_DELAY);
break;
default:
break;
}
}
// Point to next status
lPtr = rPtr + 2;
if(lPtr >= length)
return; //end of packet
}
}
void connected()
{
if (_bleMidiTransport->_connectedCallback)
_bleMidiTransport->_connectedCallback();
}
void disconnected()
{
if (_bleMidiTransport->_disconnectedCallback)
_bleMidiTransport->_disconnectedCallback();
}
};
class MyServerCallbacks: public BLEServerCallbacks {
public:
MyServerCallbacks(BLEMIDI_ESP32* bluetoothEsp32)
: _bluetoothEsp32(bluetoothEsp32) {
}
protected:
BLEMIDI_ESP32* _bluetoothEsp32 = nullptr;
void onConnect(BLEServer*) {
if (_bluetoothEsp32)
_bluetoothEsp32->connected();
};
void onDisconnect(BLEServer*) {
if (_bluetoothEsp32)
_bluetoothEsp32->disconnected();
}
};
class MyCharacteristicCallbacks: public BLECharacteristicCallbacks {
public:
MyCharacteristicCallbacks(BLEMIDI_ESP32* bluetoothEsp32)
: _bluetoothEsp32(bluetoothEsp32 ) {
}
protected:
BLEMIDI_ESP32* _bluetoothEsp32 = nullptr;
void onWrite(BLECharacteristic * characteristic) {
std::string rxValue = characteristic->getValue();
if (rxValue.length() > 0) {
_bluetoothEsp32->receive((uint8_t *)(rxValue.c_str()), rxValue.length());
}
}
};
bool BLEMIDI_ESP32::begin(const char* deviceName, BLEMIDITransport<class BLEMIDI_ESP32>* bleMidiTransport)
{
_bleMidiTransport = bleMidiTransport;
BLEDevice::init(deviceName);
// To communicate between the 2 cores.
// Core_0 runs here, core_1 runs the BLE stack
mRxQueue = xQueueCreate(64, sizeof(uint8_t)); // TODO Settings::MaxBufferSize
_server = BLEDevice::createServer();
_server->setCallbacks(new MyServerCallbacks(this));
// Create the BLE Service
auto service = _server->createService(BLEUUID(SERVICE_UUID));
// Create a BLE Characteristic
_characteristic = service->createCharacteristic(
BLEUUID(CHARACTERISTIC_UUID),
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE |
BLECharacteristic::PROPERTY_NOTIFY |
BLECharacteristic::PROPERTY_WRITE_NR
);
// Add CCCD 0x2902 to allow notify
_characteristic->addDescriptor(new BLE2902());
_characteristic->setCallbacks(new MyCharacteristicCallbacks(this));
// Start the service
service->start();
auto advertisementData = BLEAdvertisementData();
advertisementData.setFlags(0x04);
advertisementData.setCompleteServices(BLEUUID(SERVICE_UUID));
advertisementData.setName(deviceName);
// Start advertising
_advertising = _server->getAdvertising();
_advertising->setAdvertisementData(advertisementData);
_advertising->start();
return true;
}
/*! \brief Create an instance for ESP32 named <DeviceName>
*/
#define BLEMIDI_CREATE_INSTANCE(DeviceName, Name) \
BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32> BLE##Name(DeviceName); \
MIDI_NAMESPACE::MidiInterface<BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32>, MySettings> Name((BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32> &)BLE##Name);
/*! \brief Create a default instance for ESP32 named BLE-MIDI
*/
#define BLEMIDI_CREATE_DEFAULT_INSTANCE() \
BLEMIDI_CREATE_INSTANCE("BLE-MIDI", MIDI)
END_BLEMIDI_NAMESPACE

136
src/hardware/nRF52.h Normal file
View File

@ -0,0 +1,136 @@
#pragma once
// Headers for nRF52 BLE
//#include "BLECharacteristic.h"
//#include "BLEService.h"
BEGIN_BLEMIDI_NAMESPACE
class BLEMIDI_nRF52
{
private:
BLEMIDITransport<class BLEMIDI_nRF52>* _bleMidiTransport = nullptr;
public:
BLEMIDI_nRF52()
{
}
bool begin(const char*, BLEMIDITransport<class BLEMIDI_nRF52>*);
void write(uint8_t* buffer, size_t length)
{
}
/*
The general form of a MIDI message follows:
n-byte MIDI Message
Byte 0 MIDI message Status byte, Bit 7 is Set to 1.
Bytes 1 to n-1 MIDI message Data bytes, if n > 1. Bit 7 is Set to 0
There are two types of MIDI messages that can appear in a single packet: full MIDI messages and
Running Status MIDI messages. Each is encoded differently.
A full MIDI message is simply the MIDI message with the Status byte included.
A Running Status MIDI message is a MIDI message with the Status byte omitted. Running Status
MIDI messages may only be placed in the data stream if the following criteria are met:
1. The original MIDI message is 2 bytes or greater and is not a System Common or System
Real-Time message.
2. The omitted Status byte matches the most recently preceding full MIDI message’s Status
byte within the same BLE packet.
In addition, the following rules apply with respect to Running Status:
1. A Running Status MIDI message is allowed within the packet after at least one full MIDI
message.
2. Every MIDI Status byte must be preceded by a timestamp byte. Running Status MIDI
messages may be preceded by a timestamp byte. If a Running Status MIDI message is not
preceded by a timestamp byte, the timestamp byte of the most recently preceding message
in the same packet is used.
3. System Common and System Real-Time messages do not cancel Running Status if
interspersed between Running Status MIDI messages. However, a timestamp byte must
precede the Running Status MIDI message that follows.
4. The end of a BLE packet does cancel Running Status.
In the MIDI 1.0 protocol, System Real-Time messages can be sent at any time and may be
inserted anywhere in a MIDI data stream, including between Status and Data bytes of any other
MIDI messages. In the MIDI BLE protocol, the System Real-Time messages must be deinterleaved
from other messages – except for System Exclusive messages.
*/
void receive(uint8_t* buffer, size_t length)
{
}
void connected()
{
if (_bleMidiTransport->_connectedCallback)
_bleMidiTransport->_connectedCallback();
}
void disconnected()
{
if (_bleMidiTransport->_disconnectedCallback)
_bleMidiTransport->_disconnectedCallback();
}
};
bool BLEMIDI_nRF52::begin(const char* deviceName, BLEMIDITransport<class BLEMIDI_nRF52>* bleMidiTransport)
{
_bleMidiTransport = bleMidiTransport;
// 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(deviceName);
// Bluefruit.setTxPower(4); // Check bluefruit.h for supported values
// 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();
// Start advertising
// 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
return true;
}
/*! \brief Create an instance for nRF52 named <DeviceName>
*/
#define BLEMIDI_CREATE_INSTANCE(DeviceName, Name) \
BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_nRF52> BLE##Name(DeviceName); \
MIDI_NAMESPACE::MidiInterface<BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_nRF52>, MySettings> Name((BLEMIDI_NAMESPACE::BLEMIDITransport<BLEMIDI_NAMESPACE::BLEMIDI_nRF52> &)BLE##Name);
/*! \brief Create a default instance for nRF52 named BLE-MIDI
*/
#define BLEMIDI_CREATE_DEFAULT_INSTANCE() \
BLEMIDI_CREATE_INSTANCE("BLE-MIDI", MIDI)
END_BLEMIDI_NAMESPACE