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Implemented a basic sequencer in place of arpeggiator

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əlemi 2019-03-10 02:33:59 +01:00
parent 5bd20dab8c
commit 2727b2deef
1 changed files with 92 additions and 11 deletions
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103
cvkeyboard.ino
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@ -9,11 +9,17 @@
MIDI_CREATE_DEFAULT_INSTANCE(); MIDI_CREATE_DEFAULT_INSTANCE();
typedef struct SequencerStep* link;
typedef struct OctaveStatus { // This struct is for an octave status. Each bool is for 1 note typedef struct OctaveStatus { // This struct is for an octave status. Each bool is for 1 note
bool stat[12]; bool stat[12];
int nOct; int nOct;
} octst; } octst;
typedef struct SequencerStep {
int note;
link next;
} step;
// PIN DECLARATIONS // PIN DECLARATIONS
int note[12] = { // Pins used to read each note (C is 0, B is 11) int note[12] = { // Pins used to read each note (C is 0, B is 11)
@ -25,17 +31,20 @@ int sendPin[3] = { // Pins used as sender for capacitive touch button
int receivePin[3] = { // Pins used as receiver for capacitive touch buttons int receivePin[3] = { // Pins used as receiver for capacitive touch buttons
6, 3, 17 }; 6, 3, 17 };
// GLOBAL SETTINGS // GLOBAL SETTINGS
bool raw; // Signal is sent when key is detected bool raw; // Signal is sent when key is detected
// PLACEHOLDERS // PLACEHOLDERS
byte velocity = 100; // byte velocity = 100; //
byte channel = 1; // byte channel = 1; //
int bpm = 360; // int bpm = 360; //
unsigned long gate = 50; // ms of keypress if arpeggiator unsigned long gate = 50; // ms of keypress if arpeggiator
unsigned long nextBeat = 0; // Used to keep track of beats. Useless if receiving MIDI clock.
// SYSTEM VARIABLES // SEQUENCER POINTERS
link head, tail, current;
// SYSTEM VARIABLES
int nstep = 0; // Keeps track of the sequencer steps
int arp = 0; // Keeps track of last played note if arpeggiating int arp = 0; // Keeps track of last played note if arpeggiating
int midiclock = 0; // Used to sync with MIDI clock int midiclock = 0; // Used to sync with MIDI clock
int semA = 0; // Basic semaphore implementation with global counter int semA = 0; // Basic semaphore implementation with global counter
@ -82,20 +91,26 @@ void loop() {
digitalWrite(octave[cOctave], LOW); digitalWrite(octave[cOctave], LOW);
} }
if (raw) return; if (raw) return;
if (npressed < 1) return;
if (semA > 0) { if (semA > 0) {
semA--; semA--;
arp++;
while (kboard[arp] == LOW) { if (bCapStat[1]) {
arp++; checkInsert();
if (arp == 49) arp = 0;
} }
playNote(arp, HIGH); else if (bCapStat[2] && npressed > 0) {
checkReplace();
}
if (current != NULL && current->note != -1) playNote(current->note, HIGH);
} }
if (semB > 0) { if (semB > 0) {
semB--; semB--;
playNote(arp, LOW); if (bCapStat[0] && bCapStat[2]) {
deleteStep();
}
if (current != NULL && current->note != -1) playNote(current->note, LOW);
nextStep();
} }
} }
@ -162,4 +177,70 @@ void sync() {
else if (midiclock == 5 && semB == 0) semB++; else if (midiclock == 5 && semB == 0) semB++;
else if (midiclock == 12) midiclock = 0; else if (midiclock == 12) midiclock = 0;
} }
}
link newStep() {
return (link)malloc(sizeof(struct SequencerStep));
}
bool insertStep(int note) {
link newS = newStep();
if (newS == NULL) {
free(newS);
return LOW;
}
newS->note = note;
if (nstep == 0) {
newS->next = newS;
current = newS;
head = newS;
}
else {
newS->next = current->next;
current->next = newS;
}
nstep++;
return HIGH;
}
void nextStep() {
current = current->next;
}
bool deleteStep() {
if (nstep < 1) return LOW;
if (nstep == 1) {
free(current);
head = NULL;
current = NULL;
}
else {
link buffer = current->next->next;
free(current->next);
current->next = buffer;
}
nstep--;
return HIGH;
}
void checkInsert() {
if (npressed < 1) insertStep(-1);
else {
arp++;
while (!kboard[arp]) {
arp++;
if (arp == 49) arp = 0;
}
insertStep(arp);
}
}
void checkReplace() {
arp++;
while (!kboard[arp]) {
arp++;
if (arp == 49) arp = 0;
}
current->note = arp;
} }