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266 lines
6.7 KiB
266 lines
6.7 KiB
5 years ago
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// Minimoog - mega 1
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/*
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* This program is part of a minimoog-like synthesizer based on teensy 4.0
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* Copyright (C) 2020 Pierre-Loup Martin
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* This program is a synthesizer very similar to the minimoog model D.
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* It is intended to run on a Teensy 4.0, using the PJRC audio library.
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* It also uses two Arduino Mega boards to manage all the user inputs :
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* keyboard, switches, potentiometers, etc.
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* All user inputs are handled and send to the teensy board using midi commands
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*/
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/*
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* This program is for the Arduino Mega 1, it handles the readings of :
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* Category input type pin MIDI
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*
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* Keyboard
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* Keys switch 22-51 note on / note off
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* Modulation
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* LFO rate pot A0 CC 30
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* modulation mix pot A1 CC 3
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* glide pot A2 CC 5
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* pitchbend wheel pot A3 pitchbend change
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* modulation wheel pot A4 CC 1
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* modulation mix 1 switch 2 CC 117
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* modulation mix 2 switch 3 CC 118
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* osc modulation switch 4 CC 115
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* glide switch 5 CC 65
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* LFO waveform switch 6 CC 119
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* Oscillators
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* osc 1 range switch A5 CC 102
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* osc 1 waveform switch A6 CC 103
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* osc 2 range switch A7 CC 104
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* osc 2 waveform switch A8 CC 105
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* osc 3 range switch A9 CC 106
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* osc 3 waveform switch A10 CC 107
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* osc 3 control switch 7 CC 108
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* Mixer
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* osc 1 mix pot A11 CC 85
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* osc 2 mix pot A12 CC 86
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* osc 3 mix pot A13 CC 87
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* noise mix pot A14 CC 88
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* external mix pot A15 CC 89
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* osc 1 switch 8 Directly added to mix
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* osc 2 switch 9 ditto
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* osc 3 switch 10 ditto
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* noise switch 11 ditto
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* external switch 12 ditto
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* noise color switch 13 CC 114
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* Other
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* function switch 14 CC 113
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* transpose + switch 52 CC 112
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* transpose - switch 53 CC 112
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* Communication
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* TX1 to mega 2 18
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* RX1 from mega 2 19
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*/
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// includes
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#include "MIDI.h"
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#include "PushButton.h"
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// Constants
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const uint8_t NUM_KEYS = 30;
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const uint8_t MIDI_OFFSET = 23; // to be modified
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// Digital pin definition
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const uint8_t KEYS[NUM_KEYS] = {
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
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34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
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46, 47, 48, 49, 50, 51
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};
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PushButton keys[NUM_KEYS];
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const uint8_t PIN_MOD_MIX_1 = 2;
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const uint8_t PIN_MOD_MIX_2 = 3;
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const uint8_t PIN_OSC_MOD = 4;
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const uint8_t PIN_GLIDE = 5;
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const uint8_t PIN_DECAY = 6;
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const uint8_t PIN_LFO_WAVEFORM = 7;
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const uint8_t PIN_MIX_OSC_1 = 9;
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const uint8_t PIN_MIX_OSC_2 = 10;
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const uint8_t PIN_MIX_OSC_3 = 11;
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const uint8_t PIN_MIX_OSC_NOISE = 12;
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const uint8_t PIN_MIX_OSC_EXT = 13;
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const uint8_t PIN_MIX_OSC_NOISE_COLOR = 14;
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const uint8_t PIN_TRANSPOSE_PLUS = 52;
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const uint8_t PIN_TRANSPOSE_MINUS = 53;
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// Analog pin definition
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const uint8_t APIN_LFO_RATE = A0;
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const uint8_t APIN_MOD_MIX = A1;
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const uint8_t APIN_GLIDE = A2;
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const uint8_t APIN_PITCH_WHEEL = A3;
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const uint8_t APIN_MOD_WHEEL = A4;
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const uint8_t APIN_OSC_1_RANGE = A5;
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const uint8_t APIN_OSC_1_WAVEFORM = A6;
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const uint8_t APIN_OSC_2_RANGE = A7;
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const uint8_t APIN_OSC_2_WAVEFORM = A8;
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const uint8_t APIN_OSC_3_RANGE = A9;
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const uint8_t APIN_OSC_3_WAVEFORM = A10;
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const uint8_t APIN_MIX_OSC_1 = A11;
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const uint8_t APIN_MIX_OSC_2 = A12;
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const uint8_t APIN_MIX_OSC_3 = A13;
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const uint8_t APIN_MIX_NOISE = A14;
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const uint8_t APIN_MIX_EXT = A15;
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// Vars
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// Keyboard
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bool keyState[NUM_KEYS] = {};
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// Modulation
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uint16_t lfoRate = 0;
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uint16_t modMix = 0;
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uint16_t glide = 0;
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uint16_t pitchWheel = 0;
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uint16_t modWheel = 0;
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bool modMix1 = 0;
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bool modMix2 = 0;
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bool oscMod = 0;
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bool glideEn = 0;
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bool decayEn = 0;
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bool lfoWaveform = 0;
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// Oscillators
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uint8_t osc1Range = 0;
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uint8_t osc1Waveform = 0;
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uint8_t osc2Range = 0;
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uint8_t osc2Waveform = 0;
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uint8_t osc3Range = 0;
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uint8_t osc3Waveform = 0;
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bool osc3Control = 0;
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// Mixer
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uint16_t osc1Mix = 0;
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uint16_t osc2Mix = 0;
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uint16_t osc3Mix = 0;
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uint16_t feedbackMix = 0;
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uint16_t noiseMix = 0;
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bool osc1MixSw = 0;
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bool osc2MixSw = 0;
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bool osc3MixSw = 0;
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bool feedbackMixSw = 0;
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bool noiseMixSw = 0;
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// Miscellaneous
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bool function = 0;
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uint8_t defaultVelocity = 96;
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bool update = 0;
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struct midiSettings : public midi::DefaultSettings{
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// static const bool UseRunningStatus = true;
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static const long BaudRate = 115200;
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};
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// The one we use on synth
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//MIDI_CREATE_CUSTOM_INSTANCE(HardwareSerial, Serial1, midi1, midiSettings);
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// For debug purposes
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MIDI_CREATE_CUSTOM_INSTANCE(HardwareSerial, Serial, midi1, midiSettings);
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void setup(){
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// initialisation
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// Serial is for debug
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//Serial.begin(115200);
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midi1.setHandleControlChange(handleControlChange);
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midi1.begin(1);
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// Serial 1 is for sending and receiving messages to and from Teensy
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// Serial1.begin(115200);
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// Serial 2 is for sending and receiving messages to and from Mega 2
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// Serial2.begin(115200);
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// keys
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/*
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for(uint8_t i = 0; i < NUM_KEYS; ++i){
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keyState[i] = 0;
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pinMode(KEYS[i], INPUT_PULLUP);
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}
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*/
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for(uint8_t i = 0; i < NUM_KEYS; ++i){
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keys[i].begin(KEYS[i], INPUT_PULLUP);
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keys[i].setDebounceDelay(1);
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}
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}
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void loop(){
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midi1.read();
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updateKeys();
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updateControls();
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updateSwitches();
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update = 0;
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}
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void updateKeys(){
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// reading keys
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for(uint8_t i = 0; i < NUM_KEYS; ++i){
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/*
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bool newState = digitalRead(KEYS[i]);
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if(newState != keyState[i]){
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uint8_t key = i + MIDI_OFFSET;
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keyState[i] = newState;
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if(newState){
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// MIDI note on
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midi1.sendNoteOn(key, defaultVelocity, 1);
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} else {
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// MIDI note off
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midi1.sendNoteOff(key, 0, 1);
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}
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}
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*/
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keys[i].update();
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uint8_t key = i + MIDI_OFFSET;
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if(keys[i].justPressed()){
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midi1.sendNoteOn(key, defaultVelocity, 1);
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} else if(keys[i].justReleased()){
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midi1.sendNoteOff(key, 0, 1);
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} else {
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// do nothing
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}
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}
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}
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void updateControls(){
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}
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void updateSwitches(){
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}
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void handleControlChange(uint8_t channel, uint8_t command, uint8_t value){
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switch(command){
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case CC_ASK_FOR_DATA:
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update = 1;
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break;
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}
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}
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