uilleann/pipe.cpp

142 lines
3.3 KiB
C++

#include "pipe.h"
#include "fingering.h"
#include "tuning.h"
#define CLOSEDVAL 0x30
#define OPENVAL 0x70
#define GLISSANDO_STEPS (OPENVAL - CLOSEDVAL)
Pipe::Pipe() {
KeysLast = 0;
}
bool Pipe::Init() {
// Capacative touch sensor
if (!capSensor.begin(0x5A)) {
return false;
}
// Knee sensor
if (!kneeSensor.begin()) {
return false;
}
// Bag button
bagSensor.begin();
// This library takes the entire program out if you poll it 5-40 times without anything connected
bag_enabled = bagSensor.isConnected();
return true;
}
void Pipe::Update() {
uint8_t glissandoKeys = 0;
KeysLast = Keys;
Keys = 0;
// Read the bag state, if there's a bag.
// if there isn't a bag, don't try, or this library will crash the program.
if (bag_enabled) {
Bag = bagSensor.isPressed();
} else {
Bag = false;
}
// 0x6c is actually 8 bytes, but all 8 are always the same...
KneeClosedness = 255 - kneeSensor.readRange();
for (int i = 0; i < NUM_KEYS; ++i) {
uint16_t sensorReading = capSensor.filteredData(i);
uint16_t val = OPENVAL - min(max(sensorReading, CLOSEDVAL), OPENVAL);
KeyPressure[i] = val / float(GLISSANDO_STEPS);
// keys = all keys which are at least touched
// glissandoKeys = all keys which are fully closed
// The glissando operation computes the difference.
if (KeyPressure[i] > 0.0) {
bitSet(Keys, i);
}
if (KeyPressure[i] == 1.0) {
bitSet(glissandoKeys, i);
}
}
// Compute glissando amount
GlissandoPressure = 1.0;
for (int i = 0; i < 8; ++i) {
if (KeyPressure[i] > 0) {
GlissandoPressure = min(GlissandoPressure, KeyPressure[i]);
}
}
// Look up notes in the big table
struct Fingering f = FingeredNote(Keys);
struct Fingering gf = FingeredNote(glissandoKeys);
CurrentNote = f.note;
GlissandoNote = gf.note;
// Was the high bit set? That indicates "alternate fingering", which sounds different.
AltFingering = f.alt;
// If the bag is squished, jump up an octave
// But only if the left thumb is down!
if (Bag && (Keys & bit(7))) {
CurrentNote += NOTE_OCTAVE;
GlissandoNote += NOTE_OCTAVE;
}
// All keys closed + knee = no sound
Silent = ((KneeClosedness > 240) && (Keys == 0xff));
}
bool Pipe::Pressed(uint8_t key) {
return bitRead(Keys, key);
}
bool Pipe::JustPressed(uint8_t key) {
if (bitRead(Keys, key)) {
return !bitRead(KeysLast, key);
}
return false;
}
bool Pipe::typematicEvent(uint8_t key, uint16_t delay, uint16_t repeat) {
if (Pressed(key)) {
unsigned long now = millis();
if (JustPressed(key)) {
nextRepeat[key] = now + max(delay, repeat);
return true;
}
if (now >= nextRepeat[key]) {
nextRepeat[key] = now + repeat;
return true;
}
}
return false;
}
Adjust Pipe::ReadAdjust(uint8_t keyUp, uint8_t keyDown, uint16_t delay, uint16_t repeat) {
bool eventUp = typematicEvent(keyUp, delay, repeat);
bool eventDown = typematicEvent(keyDown, delay, repeat);
if (Pressed(keyUp) && Pressed(keyDown)) {
unsigned long nr = max(nextRepeat[keyUp], nextRepeat[keyDown]);
nextRepeat[keyUp] = nr;
nextRepeat[keyDown] = nr;
}
if (eventUp && eventDown) {
return ADJUST_BOTH;
} else if (eventUp) {
return ADJUST_UP;
} else if (eventDown) {
return ADJUST_DOWN;
}
return ADJUST_NONE;
}