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OpenTheremin_V3_with_MIDI
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Changed setting mode:
"Register" pot becomes "Parameter" pot
"Timbre" pot becomes "Value" pot
pull/4/head
MrDham 7 years ago committed by GitHub
parent e6a7c5acf9
commit 7138f2f73b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 127 additions and 87 deletions
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  1. 142
      Open_Theremin_V3/application.cpp
  2. 4
      Open_Theremin_V3/application.h

142
Open_Theremin_V3/application.cpp
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@ -30,9 +30,14 @@ static uint16_t old_midi_bend = 0;
static double midi_key_follow = 0.5;
static uint8_t midi_channel = 0;
static uint8_t old_midi_channel = 0;
static uint8_t midi_bend_range = 0;
static uint8_t midi_volume_trigger = 0;
uint8_t registerValue = 0;
uint16_t data_pot_value = 0;
uint16_t old_data_pot_value = 0;
Application::Application()
: _state(PLAYING),
@ -65,6 +70,7 @@ initialiseInterrupts();
EEPROM.get(4,pitchCalibrationBase);
EEPROM.get(8,volCalibrationBase);
init_parameters ();
midi_setup();
}
@ -169,24 +175,13 @@ void Application::loop() {
uint16_t volumePotValue = 0;
uint16_t pitchPotValue = 0;
int registerPotValue,registerPotValueL = 0;
int wavePotValue,wavePotValueL = 0;
uint8_t registerValue = 0;
mloop: // Main loop avoiding the GCC "optimization"
pitchPotValue = analogRead(PITCH_POT);
volumePotValue = analogRead(VOLUME_POT);
registerPotValue = analogRead(REGISTER_SELECT_POT);
wavePotValue = analogRead(WAVE_SELECT_POT);
if ((registerPotValue-registerPotValueL) >= HYST_VAL || (registerPotValueL-registerPotValue) >= HYST_VAL) registerPotValueL=registerPotValue;
if (((wavePotValue-wavePotValueL) >= HYST_VAL) || ((wavePotValueL-wavePotValue) >= HYST_VAL)) wavePotValueL=wavePotValue;
vWavetableSelector=wavePotValueL>>7;
registerValue=4-(registerPotValueL>>8);
set_parameters ();
if (_state == PLAYING && HW_BUTTON_PRESSED)
{
@ -222,8 +217,6 @@ void Application::loop() {
playStartupSound();
if (registerPotValue < 512) // if register pot turned CCW
{
// calibrate heterodyne parameters
calibrate_pitch();
calibrate_volume();
@ -234,12 +227,6 @@ void Application::loop() {
playCalibratingCountdownSound();
calibrate();
}
else // if register turned CW
{
// calibrate midi parameters
midi_calibrate ();
};
_mode=NORMAL;
HW_LED1_ON;HW_LED2_OFF;
@ -501,11 +488,6 @@ void Application::delay_NOP(unsigned long time) {
void Application::midi_setup()
{
EEPROM.get(12,midi_channel);
EEPROM.get(13,midi_bend_range);
EEPROM.get(14,midi_volume_trigger);
// Set MIDI baud rate:
Serial.begin(115200); // Baudrate for midi to serial. Use a serial to midi router http://projectgus.github.com/hairless-midiserial/
//Serial.begin(31250); // Baudrate for real midi. Use din connection https://www.arduino.cc/en/Tutorial/Midi or HIDUINO https://github.com/ddiakopoulos/hiduino
@ -705,31 +687,82 @@ void Application::midi_application ()
}
}
// midi_calibrate allows the user to set some midi parameters
// Set potentiometer accordingly to comments bellow BEFORE entering in midi calibration mode.
// Hear may help somewhat to determine entered values
void Application::midi_calibrate ()
void Application::init_parameters ()
{
uint16_t pot_channel;
uint16_t pot_bend_range;
uint16_t pot_volume_trigger;
// init data pot value to avoid 1st position to be taken into account
data_pot_value = analogRead(WAVE_SELECT_POT);
old_data_pot_value = data_pot_value;
// Transpose
registerValue=0;
uint16_t bend_range_scale;
// Audio, Audio+Midi, MIDI
// Midi channel uses "Timbre" pot.
// Waveform may help user do determine which couple of channel is chosen (WF 1 Lo -> Ch1, WF 1 Hi -> Ch2, WF 2 Lo -> Ch3, etc...)
pot_channel = analogRead(WAVE_SELECT_POT);
midi_channel = (uint8_t)((pot_channel >> 6) & 0x000F);
EEPROM.put(12,midi_channel);
// Waveform
vWavetableSelector=0;
// Channel
midi_channel = 0;
// Pitch bend range and associated distance between notes jumps use "Pitch" pot.
// The user shall set synth's pitch bend range acordingly to the selected Theremin's pitch bend range:
// 1 semitone, 2 semitones (standard), 7 semitones (a fifth), 12 semitones (an octave) or 24 semitones (two octaves).
// The "1 semitone" setting blocks pitch bend generation (use portamento on the synth)
pot_bend_range = analogRead(PITCH_POT);
bend_range_scale = pot_bend_range >> 7;
switch (bend_range_scale)
// Rod antenna mode
// Pitch bend range
midi_bend_range = 2;
// Volume trigger
midi_volume_trigger = 0;
// Loop antenna mode
}
void Application::set_parameters ()
{
uint16_t param_pot_value = 0;
uint16_t data_pot_value = 0;
param_pot_value = analogRead(REGISTER_SELECT_POT);
data_pot_value = analogRead(WAVE_SELECT_POT);
// If data pot moved
if (abs(data_pot_value-old_data_pot_value) >= 8)
{
// Modify selected parameter
switch (param_pot_value >> 7)
{
case 0:
// Transpose
registerValue=4-(data_pot_value>>8);
break;
case 1:
// Audio, Audio+Midi, MIDI
break;
case 2:
// Waveform
vWavetableSelector=data_pot_value>>7;
break;
case 3:
// Channel
midi_channel = (uint8_t)((data_pot_value >> 6) & 0x000F);
if (old_midi_channel != midi_channel)
{
// Send all note off to avoid stuck notes
midi_msg_send(midi_channel, 0xB0, 0x7B, 0x00);
old_midi_channel == midi_channel;
}
break;
case 4:
// Rod antenna mode
break;
case 5:
// Pitch bend range
switch (data_pot_value >> 7)
{
case 0:
midi_bend_range = 1;
@ -750,14 +783,19 @@ void Application::midi_calibrate ()
midi_bend_range = 24;
break;
}
break;
EEPROM.put(13,midi_bend_range);
case 6:
// Volume trigger
midi_volume_trigger = (uint8_t)((data_pot_value >> 3) & 0x007F);
break;
// Volume trigger uses "Volume" pot
// Select a high value if some percussive sounds are played (so as it is heard when volume is not null)
pot_volume_trigger = analogRead(VOLUME_POT);
midi_volume_trigger = (uint8_t)((pot_volume_trigger >> 3) & 0x007F);
EEPROM.put(14,midi_volume_trigger);
default:
// Loop antenna mode
break;
}
// Memorize data pot value to monitor changes
old_data_pot_value = data_pot_value;
}
}

4
Open_Theremin_V3/application.h
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@ -67,7 +67,9 @@ class Application {
void midi_setup();
void midi_msg_send(uint8_t channel, uint8_t midi_cmd1, uint8_t midi_cmd2, uint8_t midi_value);
void midi_application ();
void midi_calibrate ();
void init_parameters ();
void set_parameters ();
};

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