diff options
| -rwxr-xr-x | LGPL.txt | 504 | ||||
| -rw-r--r-- | Midi.cpp | 482 | ||||
| -rw-r--r-- | Midi.h | 191 | ||||
| -rw-r--r-- | examples/MidiPneumaticsExample/MidiPneumaticsExample.pde | 134 | ||||
| -rw-r--r-- | examples/MidiReceiveExample/MidiReceiveExample.pde | 98 | ||||
| -rw-r--r-- | examples/MidiSendExample/MidiSendExample.pde | 108 |
6 files changed, 1517 insertions, 0 deletions
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See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with Tymm's Arduino Midi Library. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#include "HardwareSerial.h" +#include "WConstants.h" +#include "Midi.h" + + +// This is used for tracking when we're processing a proprietary stream of data +// The assigned value is arbitrary; just for internal use. +static const int MODE_PROPRIETARY = 0xff; + + +// These are midi status message types as sent on the wire +static const int STATUS_EVENT_NOTE_OFF = 0x80; +static const int STATUS_EVENT_NOTE_ON = 0x90; +static const int STATUS_EVENT_VELOCITY_CHANGE = 0xA0; +static const int STATUS_EVENT_CONTROL_CHANGE = 0xB0; +static const int STATUS_EVENT_PROGRAM_CHANGE = 0xC0; +static const int STATUS_AFTER_TOUCH = 0xD0; +static const int STATUS_PITCH_CHANGE = 0xE0; +static const int STATUS_START_PROPRIETARY = 0xF0; +static const int STATUS_SONG_POSITION = 0xF2; +static const int STATUS_SONG_SELECT = 0xF3; +static const int STATUS_TUNE_REQUEST = 0xF6; +static const int STATUS_END_PROPRIETARY = 0xF7; +static const int STATUS_SYNC = 0xF8; +static const int STATUS_START = 0xFA; +static const int STATUS_CONTINUE = 0xFB; +static const int STATUS_STOP = 0xFC; +static const int STATUS_ACTIVE_SENSE = 0xFE; +static const int STATUS_RESET = 0xFF; + + + +// Handle decoding incoming MIDI traffic a byte at a time -- remembers +// what it needs to from one call to the next. +// +// This is a private function & not meant to be called from outside this class. +// It's used whenever data is available from the serial port. +// +void Midi::recvByte(int byte) +{ + int tmp; + int channel; + int bigval; /* temp 14-bit value for pitch, song pos */ + + + if (recvMode_ & MODE_PROPRIETARY + && byte != STATUS_END_PROPRIETARY) + { + /* If proprietary handling compiled in, just pass all data received + * after a START_PROPRIETARY event to proprietary_decode + * until get an END_PROPRIETARY event + */ + +#ifdef CONFIG_MIDI_PROPRIETARY + proprietaryDecode(byte); +#endif + + return; + } + + if (byte & 0x80) { + + /* All < 0xf0 events get at least 1 arg byte so + * it's ok to mask off the low 4 bits to figure + * out how to handle the event for < 0xf0 events. + */ + + tmp = byte; + + if (tmp < 0xf0) + tmp &= 0xf0; + + switch (tmp) { + /* These status events take 2 bytes as arguments */ + case STATUS_EVENT_NOTE_OFF: + case STATUS_EVENT_NOTE_ON: + case STATUS_EVENT_VELOCITY_CHANGE: + case STATUS_EVENT_CONTROL_CHANGE: + case STATUS_PITCH_CHANGE: + case STATUS_SONG_POSITION: + recvBytesNeeded_ = 2; + recvByteCount_ = 0; + recvEvent_ = byte; + break; + + /* 1 byte arguments */ + case STATUS_EVENT_PROGRAM_CHANGE: + case STATUS_AFTER_TOUCH: + case STATUS_SONG_SELECT: + recvBytesNeeded_ = 1; + recvByteCount_ = 0; + recvEvent_ = byte; + return; + + /* No arguments ( > 0xf0 events) */ + case STATUS_START_PROPRIETARY: + recvMode_ |= MODE_PROPRIETARY; + +#ifdef CONFIG_MIDI_PROPRIETARY + proprietaryDecodeStart(); +#endif + + break; + case STATUS_END_PROPRIETARY: + recvMode_ &= ~MODE_PROPRIETARY; + +#ifdef CONFIG_MIDI_PROPRIETARY + proprietaryDecodeEnd(); +#endif + + break; + case STATUS_TUNE_REQUEST: + handleTuneRequest(); + break; + case STATUS_SYNC: + handleSync(); + break; + case STATUS_START: + handleStart(); + break; + case STATUS_CONTINUE: + handleContinue(); + break; + case STATUS_STOP: + handleStop(); + break; + case STATUS_ACTIVE_SENSE: + handleActiveSense(); + break; + case STATUS_RESET: + handleReset(); + break; + } + + return; + } + + if (++recvByteCount_ == recvBytesNeeded_) { + /* Copy out the channel (if applicable; in some cases this will be meaningless, + * but in those cases the value will be ignored) + */ + channel = (recvEvent_ & 0x0f) + 1; + + tmp = recvEvent_; + if (tmp < 0xf0) { + tmp &= 0xf0; + } + + /* See if this event matches our MIDI channel + * (or we're accepting for all channels) + */ + if (!channelIn_ + || (channel == channelIn_) + || (tmp >= 0xf0)) + { + switch (tmp) { + case STATUS_EVENT_NOTE_ON: + /* If velocity is 0, it's actually a note off & should fall thru + * to the note off case + */ + if (byte) { + handleNoteOn(channel, recvArg0_, byte); + break; + } + + case STATUS_EVENT_NOTE_OFF: + handleNoteOff(channel, recvArg0_, byte); + break; + case STATUS_EVENT_VELOCITY_CHANGE: + handleVelocityChange(channel, recvArg0_, byte); + break; + case STATUS_EVENT_CONTROL_CHANGE: + handleControlChange(channel, recvArg0_, byte); + break; + case STATUS_EVENT_PROGRAM_CHANGE: + handleProgramChange(channel, byte); + break; + case STATUS_AFTER_TOUCH: + handleAfterTouch(channel, byte); + break; + case STATUS_PITCH_CHANGE: + bigval = (byte << 7) | recvArg0_; + handlePitchChange(bigval); + break; + case STATUS_SONG_POSITION: + bigval = (byte << 7) | recvArg0_; + handleSongPosition(bigval); + break; + case STATUS_SONG_SELECT: + handleSongSelect(byte); + break; + } + } + + /* Just reset the byte count; keep the same event -- might get more messages + trailing from current event. + */ + recvByteCount_ = 0; + } + + recvArg0_ = byte; +} + + +// Try to read data at serial port & pass anything read to processing function +void Midi::poll(void) +{ + int c; + + + // Just keep sucking data from serial port until it runs out, processing + // MIDI messages as we go + while((c = serial_.read()) != -1) { + recvByte(c); + } +} + + +// Send Midi NOTE OFF message to a given channel, with note 0-127 and velocity 0-127 +void Midi::sendNoteOff(unsigned int channel, unsigned int note, unsigned int velocity) +{ + int status = STATUS_EVENT_NOTE_OFF | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(note & 0x7f, BYTE); + serial_.print(velocity & 0x7f, BYTE); +} + + +// Send Midi NOTE ON message to a given channel, with note 0-127 and velocity 0-127 +void Midi::sendNoteOn(unsigned int channel, unsigned int note, unsigned int velocity) +{ + int status = STATUS_EVENT_NOTE_ON | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(note & 0x7f, BYTE); + serial_.print(velocity & 0x7f, BYTE); +} + + +// Send a Midi VELOCITY CHANGE message to a given channel, with given note 0-127, +// and new velocity 0-127 +void Midi::sendVelocityChange(unsigned int channel, unsigned int note, unsigned int velocity) +{ + int status = STATUS_EVENT_VELOCITY_CHANGE | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(note & 0x7f, BYTE); + serial_.print(velocity & 0x7f, BYTE); +} + + +// Send a Midi CC message to a given channel, as a given controller 0-127, with given +// value 0-127 +void Midi::sendControlChange(unsigned int channel, unsigned int controller, unsigned int value) +{ + int status = STATUS_EVENT_CONTROL_CHANGE | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(controller & 0x7f, BYTE); + serial_.print(value & 0x7f, BYTE); +} + + +// Send a Midi PROGRAM CHANGE message to given channel, with program ID 0-127 +void Midi::sendProgramChange(unsigned int channel, unsigned int program) +{ + int status = STATUS_EVENT_PROGRAM_CHANGE | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(program & 0x7f, BYTE); +} + + +// Send a Midi AFTER TOUCH message to given channel, with velocity 0-127 +void Midi::sendAfterTouch(unsigned int channel, unsigned int velocity) +{ + int status = STATUS_AFTER_TOUCH | ((channel - 1) & 0x0f); + + + if (sendFullCommands_ || (lastStatusSent_ != status)) { + serial_.print(status, BYTE); + } + + serial_.print(velocity & 0x7f, BYTE); +} + + +// Send a Midi PITCH CHANGE message, with a 14-bit pitch (always for all channels) +void Midi::sendPitchChange(unsigned int pitch) +{ + serial_.print(STATUS_PITCH_CHANGE, BYTE); + serial_.print(pitch & 0x7f, BYTE); + serial_.print((pitch >> 7) & 0x7f, BYTE); +} + + +// Send a Midi SONG POSITION message, with a 14-bit position (always for all channels) +void Midi::sendSongPosition(unsigned int position) +{ + serial_.print(STATUS_SONG_POSITION, BYTE); + serial_.print(position & 0x7f, BYTE); + serial_.print((position >> 7) & 0x7f, BYTE); +} + + +// Send a Midi SONG SELECT message, with a song ID of 0-127 (always for all channels) +void Midi::sendSongSelect(unsigned int song) +{ + serial_.print(STATUS_SONG_SELECT, BYTE); + serial_.print(song & 0x7f, BYTE); +} + + +// Send a Midi TUNE REQUEST message (TUNE REQUEST is always for all channels) +void Midi::sendTuneRequest(void) +{ + serial_.print(STATUS_TUNE_REQUEST, BYTE); +} + + +// Send a Midi SYNC message (SYNC is always for all channels) +void Midi::sendSync(void) +{ + serial_.print(STATUS_SYNC, BYTE); +} + + +// Send a Midi START message (START is always for all channels) +void Midi::sendStart(void) +{ + serial_.print(STATUS_START, BYTE); +} + + +// Send a Midi CONTINUE message (CONTINUE is always for all channels) +void Midi::sendContinue(void) +{ + serial_.print(STATUS_CONTINUE, BYTE); +} + + +// Send a Midi STOP message (STOP is always for all channels) +void Midi::sendStop(void) +{ + serial_.print(STATUS_STOP, BYTE); +} + + +// Send a Midi ACTIVE SENSE message (ACTIVE SENSE is always for all channels) +void Midi::sendActiveSense(void) +{ + serial_.print(STATUS_ACTIVE_SENSE, BYTE); +} + + +// Send a Midi RESET message (RESET is always for all channels) +void Midi::sendReset(void) +{ + serial_.print(STATUS_RESET, BYTE); +} + + +// Constructor -- set up defaults for variables, get ready for use (but don't +// take over serial port yet) +Midi::Midi(HardwareSerial &serial) : serial_(serial) +{ + /* Not in proprietary stream */ + recvMode_ = 0; + /* No bytes recevied */ + recvByteCount_ = 0; + /* Not processing an event */ + recvEvent_ = 0; + /* No arguments to the event we haven't received */ + recvArg0_ = 0; + /* Not waiting for bytes to complete a message */ + recvBytesNeeded_ = 0; + // There was no last event. + lastStatusSent_ = false; + // Don't send the extra bytes; just send deltas + sendFullCommands_ = false; + + /* Listening to all channels */ + channelIn_ = 0; +} + + +// Open the serial port and begin processing. +void Midi::begin(unsigned int channel, unsigned long baud) +{ + channelIn_ = channel; + serial_.begin(baud); +} + + +// Set (package-specific) parameters for the Midi instance +void Midi::setParam(unsigned int param, unsigned int val) +{ + if (param == PARAM_SEND_FULL_COMMANDS) { + if (val) { + sendFullCommands_ = true; + } else { + sendFullCommands_ = false; + } + } else if (param == PARAM_CHANNEL_IN) { + channelIn_ = val; + } +} + + +// Get (package-specific) parameters for the Midi instance +unsigned int Midi::getParam(unsigned int param) +{ + if (param == PARAM_SEND_FULL_COMMANDS) { + return sendFullCommands_; + } else if (param == PARAM_CHANNEL_IN) { + return channelIn_; + } + + return 0; +} + + +// Placeholders. You should subclass the Midi base class and define these to have your +// version called. +void Midi::handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity) {} +void Midi::handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity) {} +void Midi::handleVelocityChange(unsigned int channel, unsigned int note, unsigned int velocity) {} +void Midi::handleControlChange(unsigned int channel, unsigned int controller, unsigned int value) {} +void Midi::handleProgramChange(unsigned int channel, unsigned int program) {} +void Midi::handleAfterTouch(unsigned int channel, unsigned int velocity) {} +void Midi::handlePitchChange(unsigned int pitch) {} +void Midi::handleSongPosition(unsigned int position) {} +void Midi::handleSongSelect(unsigned int song) {} +void Midi::handleTuneRequest(void) {} +void Midi::handleSync(void) {} +void Midi::handleStart(void) {} +void Midi::handleContinue(void) {} +void Midi::handleStop(void) {} +void Midi::handleActiveSense(void) {} +void Midi::handleReset(void) {} @@ -0,0 +1,191 @@ +/* + * Midi.h: Header for MIDI processing library, Arduino version + * + * (c) 2003-2008 Tymm Twillman <tymm@booyaka.com> + * + * This file is part of Tymm's Arduino Midi Library. + * + * Tymm's Arduino Midi Library is free software: you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation, either version 2.1 + * of the License, or (at your option) any later version. + * + * Tymm's Arduino Midi Library is distributed in the hope that it will be + * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with Tymm's Arduino Midi Library. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#ifndef MIDI_H +#define MIDI_H + +#include "HardwareSerial.h" + + +/* + * This is the Midi class. If you are just sending Midi data, you only need to make an + * instance of the class, passing it your serial port -- in most cases it looks like + * + * Midi midi(Serial); + * + * then you don't need to do anything else; you can start using it to send Midi messages, + * e.g. + * + * midi.sendNoteOn(1, note, velocity); + * + * If you are using it to receive Midi data, it's a little more complex & you will need + * to subclass the Midi class. + * + * For people not used to C++ this may look confusing, but it's actually pretty easy. + * Note that you only need to write the functions for event types you want to handle. + * They should match the names & prototypes of the functions in the class; look at + * the functions in the Midi class below that have the keyword "virtual" to see which + * ones you can use. + * + * Here's an example of one that takes NOTE ON, NOTE OFF, and CONTROL CHANGE: + * + * class MyMidi : public Midi { + * public: + * + * // Need this to compile; it just hands things off to the Midi class. + * MyMidi(HardwareSerial &s) : Midi(s) {} + * + * void handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity) + * { + * if (note == 40) {digitalWrite(13, HIGH); } + * } + * + * void handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity) + * { + * if (note == 40) { digitalWrite(13, LOW); } + * } + * + * void handleControlChange(unsigned int channel, unsigned int controller, + * unsigned int value) + * { + * analogWrite(6, value * 2); + * } + * + * Then you need to make an instance of this class: + * + * MyMidi midi(Serial); + * + * If receiving Midi data, you also need to call the poll function every time through + * loop(); e.g. + * + * void loop() { + * midi.poll(); + * } + * + * This causes the Midi class to read data from the serial port and process it. + */ + +class Midi { +private: + // The serial port used by this Midi instance (it takes complete control over the port) + HardwareSerial serial_; + + /* Private Receive Parameters */ + + // The channel this Midi instance receives data for (0 means all channels) + int channelIn_; + + // These are for keeping track of partial Midi messages as bytes come in + int recvMode_; + int recvByteCount_; + int recvEvent_; + int recvArg0_; + int recvBytesNeeded_; + int lastStatusSent_; + + /* Private Send Parameters */ + + // This controls whether every Midi message gets a command byte sent with it + // (Midi can just send a single command byte and then stream events without + // sending the command each time) + bool sendFullCommands_; + + /* Internal functions */ + + // Called whenever data is read from the serial port + void recvByte(int byte); + + // This doesn't work -- by making it private, we ensure nobody ever calls it + Midi(); + +public: + // Set this parameter to anything other than 0 to cause every MIDI update to + // include a copy of the current event (e.g. for every note off to include + // the NOTE OFF event) -- by default, if an event is the same type of event as + // the last one sent, the event byte isn't sent; just the new note/velocity + static const unsigned int PARAM_SEND_FULL_COMMANDS = 0x1000; + + // Use this parameter to update the channel the MIDI code is looking for messages + // to. 0 means "all channels". + static const unsigned int PARAM_CHANNEL_IN = 0x1001; + + + // Constructor -- generally just use e.g. "Midi midi(Serial);" + Midi(HardwareSerial &serial); + + // Call to start the serial port, at given baud. For many applications + // the default parameters are just fine (which will cause messages for all + // MIDI channels to be delivered) + void begin(unsigned int channel = 0, unsigned long baud = 31250); + + + // Changes the updateable parameters (params are Midi::PARAM_SEND_FULL_COMMANDS or + // Midi::PARAM_CHANNEL_IN -- see above for what they mean) + void setParam(unsigned int param, unsigned int val); + + // Get current values for the user updateable parameters (params, etc same as above) + unsigned int getParam(unsigned int param); + + + // poll() should be called every time through loop() IF dealing with incoming MIDI + // (if you're only SENDING MIDI events from the Arduino, you don't need to call + // poll); it causes data to be read from the serial port and processed. + void poll(); + + // Call these to send MIDI messages of the given types + void sendNoteOff(unsigned int channel, unsigned int note, unsigned int velocity); + void sendNoteOn(unsigned int channel, unsigned int note, unsigned int velocity); + void sendVelocityChange(unsigned int channel, unsigned int note, unsigned int velocity); + void sendControlChange(unsigned int channel, unsigned int controller, unsigned int value); + void sendProgramChange(unsigned int channel, unsigned int program); + void sendAfterTouch(unsigned int channel, unsigned int velocity); + void sendPitchChange(unsigned int pitch); + void sendSongPosition(unsigned int position); + void sendSongSelect(unsigned int song); + void sendTuneRequest(void); + void sendSync(void); + void sendStart(void); + void sendContinue(void); + void sendStop(void); + void sendActiveSense(void); + void sendReset(void); + + // Overload these in a subclass to get MIDI messages when they come in + virtual void handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity); + virtual void handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity); + virtual void handleVelocityChange(unsigned int channel, unsigned int note, unsigned int velocity); + virtual void handleControlChange(unsigned int channel, unsigned int controller, unsigned int value); + virtual void handleProgramChange(unsigned int channel, unsigned int program); + virtual void handleAfterTouch(unsigned int channel, unsigned int velocity); + virtual void handlePitchChange(unsigned int pitch); + virtual void handleSongPosition(unsigned int position); + virtual void handleSongSelect(unsigned int song); + virtual void handleTuneRequest(void); + virtual void handleSync(void); + virtual void handleStart(void); + virtual void handleContinue(void); + virtual void handleStop(void); + virtual void handleActiveSense(void); + virtual void handleReset(void); +}; + +#endif /* #ifndef MIDI_H ... */ diff --git a/examples/MidiPneumaticsExample/MidiPneumaticsExample.pde b/examples/MidiPneumaticsExample/MidiPneumaticsExample.pde new file mode 100644 index 0000000..33ff588 --- /dev/null +++ b/examples/MidiPneumaticsExample/MidiPneumaticsExample.pde @@ -0,0 +1,134 @@ +/* + * This sketch was for a project controlling pneumatics via Midi -- I used 4 + * daisychained TPIC6B595 shift registers to control 32 pneumatic solenoids + * requiring 24v control signals. In my setup I used Garage Band as the + * sequencer (since it was already on my machine), with midiO plugin, + * sending Midi to Max/MSP, where I connected a Midi In object to a serial + * object that sent the data to my Arduino. + * + * A little complicated, but it worked reasonably well. + */ + +#include "Midi.h" + + +// Pins used to communicate with the TPIC6B595 shiftg registers +#define D_PIN 2 +#define RCK_PIN 3 +#define SRCK_PIN 4 +#define SRCLR_PIN 5 +#define EN_PIN 6 + +// Number of shift registers in the chain +#define NUM_TPIC6B595 4 + + +// Subclassing Midi class to override the note handling functions +class MyMidi : public Midi { + public: + + MyMidi(HardwareSerial &s) : Midi(s) {} + + void handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity) + { + // indicator bit to show note on received + digitalWrite(13, HIGH); + + // set the pin corresponding to the note high (open the valve); the + // note & 31 bit is to limit the pin # from 0-31 since otherwise + // with a high note we could end up writing memory that's outside + // the array + tpic6b595_set((note & 31), HIGH); + tpic6b595_load(); + } + + void handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity) + { + // This is pretty much the same as handleNoteOn, except it turns things off + // instead of on. + + digitalWrite(13, LOW); + tpic6b595_set((note & 31), LOW); + tpic6b595_load(); + } +}; + + +// Since the shift registers are read-only, need to keep a copy of the current +// state of each output locally +unsigned char tpic6b595_vals[NUM_TPIC6B595]; + +// Create the actual instance of our Midi class; attach it to the standard +// serial port. +MyMidi midi(Serial); + + +// Function for initializing the pins for communicating with the TPIC6B595's +void tpic6b595_init() +{ + + pinMode(D_PIN, OUTPUT); + pinMode(RCK_PIN, OUTPUT); + pinMode(SRCK_PIN, OUTPUT); + pinMode(SRCLR_PIN, OUTPUT); + pinMode(EN_PIN, OUTPUT); + + digitalWrite(RCK_PIN, LOW); + digitalWrite(SRCK_PIN, LOW); + digitalWrite(SRCLR_PIN, LOW); + digitalWrite(SRCLR_PIN, HIGH); + digitalWrite(EN_PIN, LOW); +} + + +// Load the current state of the TPIC6B595 values into the shift registers & +// latch the new values +void tpic6b595_load() +{ + for (int i = 0; i < NUM_TPIC6B595; i++) { + shiftOut(D_PIN, SRCK_PIN, MSBFIRST, tpic6b595_vals[(NUM_TPIC6B595 - 1) - i]); + } + + digitalWrite(RCK_PIN, HIGH); + delayMicroseconds(10); + digitalWrite(RCK_PIN, LOW); +} + + +// Get the state of any of the TPIC6B595 pins (first chip is considered to +// be pins 0-7, chip 2 pins 8-15, etc. +unsigned char tpic6b595_get(unsigned char pin) +{ + return (tpic6b595_vals[pin / 8] & _BV(pin & 7)); +} + + +// Set the state of any of the TPIC6B595 pins (again, first chip is pins 0-7, +// chip 2 pins 8-15, etc. +void tpic6b595_set(unsigned char pin, unsigned char val) +{ + if (val) { + tpic6b595_vals[pin / 8] |= _BV(pin & 7); + } else { + tpic6b595_vals[pin / 8] &= ~_BV(pin & 7); + } +} + + +// Set pin 13 to output for some indication of data being received, initialize the +// shift registers, start the Midi instance and turn off all shift register outputs +void setup() +{ + pinMode(13, OUTPUT); + tpic6b595_init(); + midi.begin(0, 115200); + + tpic6b595_load(); +} + + +// All we gotta do is process Midi data... +void loop() +{ + midi.poll(); +} diff --git a/examples/MidiReceiveExample/MidiReceiveExample.pde b/examples/MidiReceiveExample/MidiReceiveExample.pde new file mode 100644 index 0000000..36a8c30 --- /dev/null +++ b/examples/MidiReceiveExample/MidiReceiveExample.pde @@ -0,0 +1,98 @@ +// This sketch turns on the LED at D13 when any "NOTE ON" message is received. +// It turns the LED off when any "NOTE OFF" message is received. +// +// (note that NOTE ON's with velocity = 0 are actually NOTE OFF's, and are +// treated as such) +// +// It's necessary to subclass Midi in order to handle receiving messages. If +// you're only sending data, see MidiSendExample, which is a bit simpler. +// +// If you're both sending AND receiving you'll need to subclass like this, +// but only for receive functions. +// + +#include "Midi.h" + +// To use the Midi class for receiving Midi messages, you need to subclass it. +// If you're a C++ person this makes sense; if not, just follow the example +// functions below. +// +// Basically, MyMidi here can do anything Midi can do -- it just has the ability +// to easily change what the functions do when different message types are received. +// +class MyMidi : public Midi { + public: + + // Need this to compile; it just hands things off to the Midi class. + MyMidi(HardwareSerial &s) : Midi(s) {} + + void handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity) + { + digitalWrite(13, HIGH); + } + + void handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity) + { + digitalWrite(13, LOW); + } + + /* You can define any of these functions and they will be called when the + matching message type is received. Otherwise those types of Midi messages + are just ignored. + + For C++ folks: these are all declared virtual in the base class + + void handleNoteOff(unsigned int channel, unsigned int note, unsigned int velocity); + void handleNoteOn(unsigned int channel, unsigned int note, unsigned int velocity); + void handleVelocityChange(unsigned int channel, unsigned int note, unsigned int velocity); + void handleControlChange(unsigned int channel, unsigned int controller, unsigned int value); + void handleProgramChange(unsigned int channel, unsigned int program); + void handleAfterTouch(unsigned int channel, unsigned int velocity); + void handlePitchChange(unsigned int pitch); + void handleSongPosition(unsigned int position); + void handleSongSelect(unsigned int song); + void handleRuneRequest(void); + void handleSync(void); + void handleStart(void); + void handleContinue(void); + void handleStop(void); + void handleActiveSense(void); + void handleReset(void); +*/ +}; + +// Create an instance of the MyMidi class. +MyMidi midi(Serial); + + +void setup() +{ + pinMode(13, OUTPUT); + + // This causes the midi object to listen to ALL Midi channels. If a number + // from 1-16 is passed, messages will be filtered so that any messages to + // channels other than the given one will be ignored. + // + // Note that you can pass a second parameter as a baud rate, if you're doing + // Midi protocol but using some other communication method (e.g. sending + // Midi data from Max/MSP using the standard Arduino USB connection, you + // can set the baud rate to something more standard and use the regular + // Max serial object) + midi.begin(0); +} + + +void loop() +{ + // Must be called every time through loop() IF dealing with incoming MIDI -- + // if you're just sending MIDI out, you don't need to use poll(). + // + // Make sure other code doesn't take too long to process or serial data + // can get backed up (and you can end up with obnoxious latency that ears + // don't like). + // + // The poll function will cause the midi code to suck data from the serial + // port and process it, and call any functions that are defined for handling + // midi messages. + midi.poll(); +} diff --git a/examples/MidiSendExample/MidiSendExample.pde b/examples/MidiSendExample/MidiSendExample.pde new file mode 100644 index 0000000..cc1eff9 --- /dev/null +++ b/examples/MidiSendExample/MidiSendExample.pde @@ -0,0 +1,108 @@ +// This sketch is for building a simple MIDI controller with 2 buttons for +// sending note values & 2 knobs for control values +// +// To get this working, you should have set up the following hardware: +// - a switch from Digital Pin 2 to +5v, and a 1 to 10K resistor from +// pin 2 to ground +// - a switch from Digital Pin 3 to +5v, and a 1 to 10K resistor from +// pin 3 to ground +// - a potentiometer with one side at +5v, one side at ground, and the +// wiper (center pin) connected to Analog Pin 0 +// - a potentiometer with one side at +5v, one side at ground, and the +// wiper (center pin) connected to Analog Pin 1 +// + +#include "Midi.h" + +// Create an instance of the Midi class. +// +// If we were had to receive messages, you'd have to make a subclass of the +// Midi class. See the MidiReceiveExample for an example of how to do that. +// +// Sending is a lot easier :) +Midi midi(Serial); + + +void setup() +{ + // Configure digital pins for input. + pinMode(2, INPUT); + pinMode(3, INPUT); + + // This causes the midi object to listen to ALL Midi channels. If a number + // from 1-16 is passed, messages will be filtered so that any messages to + // channels other than the given one will be ignored. + midi.begin(0); +} + +int lastDigital2 = LOW; +int lastDigital3 = LOW; + +int lastAnalog0 = 0; +int lastAnalog1 = 0; + +// MIDI channel to send messages to +int channelOut = 1; + + +void doControls() +{ + int a; + + + // Changes on analog lines cause control change events + // to be sent; these are parameters from 0-127 + + a = analogRead(0) / 8 ; + if (a != lastAnalog0) { + midi.sendControlChange(channelOut, 15, a); + lastAnalog0 = a; + } + + a = analogRead(1) / 8; + if (a != lastAnalog1) { + midi.sendControlChange(channelOut, 16, a); + lastAnalog1 = a; + } +} + + +void doKeys() +{ + int d; + + + // Basic code to check pins 2-5; if there's a change on the pin, send + // a NOTE ON or NOTE OFF, depending on whether the button was pressed + // or released, with a different note value for each button. The velocity + // for all of the NOTE ON messages is the max (127) + + d = digitalRead(2); + if (d != lastDigital2) { + if (d == HIGH) { + midi.sendNoteOn(channelOut, 40, 127); + } else { + midi.sendNoteOff(channelOut, 40, 0); + } + lastDigital2 = d; + } + + d = digitalRead(3); + if (d != lastDigital3) { + if (d == HIGH) { + midi.sendNoteOn(channelOut, 41, 127); + } else { + midi.sendNoteOff(channelOut, 41, 0); + } + lastDigital3 = d; + } +} + + +void loop() +{ + // DON'T need to call midi.poll(), because this sketch doesn't need to + // receive any Midi data. + doKeys(); + doControls(); +} |