85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
#include "pipe.h"
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#include "fingering.h"
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// Kludge time: this is something I did just to make my breadboard look nicer.
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#define KEY_OFFSET 2
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#define CLOSEDVAL 0x30
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#define OPENVAL 0x70
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#define GLISSANDO_STEPS (OPENVAL - CLOSEDVAL)
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Pipe::Pipe() {
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}
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bool Pipe::Init() {
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// Capacative touch sensor
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if (!capSensor.begin(0x5A)) {
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return false;
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}
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// Proximity sensor
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if (paj7620Init()) {
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return false;
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}
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// Bag button
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bagSensor.begin();
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// This library takes the entire program out if you poll it 5-40 times without anything connected
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bag_enabled = bagSensor.isConnected();
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return true;
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}
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void Pipe::Update() {
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uint8_t glissandoKeys = 0;
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// Read the bag state, if there's a bag.
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// if there isn't a bag, don't try, or this library will crash the program.
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if (bag_enabled) {
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bag = bagSensor.isPressed();
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} else {
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bag = false;
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}
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// 0x6c is actually 8 bytes, but all 8 are always the same...
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paj7620ReadReg(0x6c, 1, &kneeClosedness);
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keys = 0;
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glissandoKeys = 0;
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for (int i=0; i<8; i++) {
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uint16_t val = max(capSensor.filteredData(i+KEY_OFFSET), CLOSEDVAL);
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float openness = ((val - CLOSEDVAL) / float(GLISSANDO_STEPS));
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// keys = all keys which are at least touched
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// glissandoKeys = all keys which are fully closed
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// The glissando operation computes the difference.
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if (openness < 1.0) {
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glissandoOpenness = max(glissandoOpenness, openness);
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bitSet(keys, i);
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}
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if (openness == 0.0) {
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bitSet(glissandoKeys, i);
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}
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}
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// Look up notes in the big table
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note = uilleann_matrix[keys];
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glissandoNote = uilleann_matrix[glissandoKeys];
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// Was the high bit set? That indicates "alternate fingering", which sounds different.
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altFingering = (note & 0x80);
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note &= 0x7f;
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glissandoNote &= 0x7f;
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// If the bag is squished, jump up an octave
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// But only if the left thumb is down!
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if (bag && (keys & bit(7))) {
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note += 12;
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glissandoNote += 12;
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}
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// All keys closed + knee = no sound
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silent = ((kneeClosedness > 240) && (keys == 0xff));
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}
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