400 lines
11 KiB
C++
400 lines
11 KiB
C++
#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SSD1306.h>
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#include <RotaryEncoder.h>
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#include <FlexiTimer2.h>
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#include <EEPROM.h>
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#define SCREEN_ADDRESS 0x3C
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#define PPQN 24
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#define PULSE_LENGTH 5 //ms
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#define MAXBPM 250 //250 at 24ppqn with 5ms pulse will be 50/50 square wave
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#define MINBPM 20
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#define INPUT_CONNECTED_PIN 0
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#define INPUT_PIN 2 //needs to be an interrupt pin
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#define ENC_BTN_PIN 17
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#define ENC_D1_PIN 4
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#define ENC_D2_PIN 3
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#define START_STOP_BTN_PIN 14
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#define ANALOGUE_INPUT_1_PIN A1
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#define ANALOGUE_INPUT_2_PIN A1
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const int outsPins[6] = {5, 6, 7, 8, 9, 10};
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const int clockModes[18] = {-24, -16, -12, -8, -6, -4, -3, -2, 1, 2, 3, 4, 5, 6, 7, 8, 16, 32}; //positive - divide, negative - multiply, 0 - off
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unsigned int bpm = 130;
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struct channel {
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unsigned int mode;
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bool random;
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bool modulationChannel; //0 - A1, 1 - A2
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int modulationRange;
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};
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channel channels[6] = { //array of channel settings
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{ 8, 0, 0, 0 },
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{ 9, 0, 0, 0 },
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{10, 0, 0, 0 },
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{ 7, 1, 0, 0 },
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{ 2, 0, 1, 4 },
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{ 6, 1, 1,-4 }
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};
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int outsClocksCounts[6];
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int playingModes[6]; //actual channel modes array updated from channels each beat
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bool externalClockConnected;
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bool externalClockConnectedOld;
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int clockCount = 0;
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int pulseClockCount = 0;
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int pulseCount = 0;
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int pulsePeriod;
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bool isPlaying = 0;
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int needToResetChannel;
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bool beatCounted = false;
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bool pulseCounted = false;
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int displayTab = 0;
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int displayTabOld;
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int insideTab = 0;
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bool playBtnPushed = false;
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int a1Input = 0;
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int a2Input = 0;
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int encPositionOld = 0;
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unsigned long encPressedTime;
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unsigned long encReleasedTime;
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bool encPressRegistered;
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Adafruit_SSD1306 display(128, 64, &Wire, -1);
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RotaryEncoder encoder(ENC_D1_PIN, ENC_D2_PIN, RotaryEncoder::LatchMode::TWO03);
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void setup() {
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Serial.begin(9600);
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EEPROM.get(0, bpm);
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EEPROM.get(sizeof(int), channels);
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pinMode(INPUT_CONNECTED_PIN, INPUT);
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pinMode(ENC_BTN_PIN, INPUT_PULLUP);
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pinMode(START_STOP_BTN_PIN, INPUT_PULLUP);
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pinMode(START_STOP_BTN_PIN, ANALOGUE_INPUT_1_PIN);
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pinMode(INPUT_PIN, INPUT_PULLUP); //probably will need interrupt
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attachInterrupt(digitalPinToInterrupt(INPUT_PIN), externalClock, RISING);
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for (int i=0; i<6; i++) {
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pinMode(outsPins[i], OUTPUT);
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}
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display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
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updateScreen();
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updateTiming();
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FlexiTimer2::set(1, 1.0/1000, internalClock); // 1.0/1000 = 1ms period
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FlexiTimer2::start();
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}
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void loop() {
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checkInputs();
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}
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void internalClock() {
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if (isPlaying) {
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// Action on each pulse
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if (pulseClockCount == 0 && !pulseCounted) {
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//modulation
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for (int i = 0; i<6; i++) {
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int mod;
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if (!channels[i].modulationChannel) {
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mod = a1Input;
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} else {
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mod = a2Input;
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}
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mod = map (mod, 0, 1023, 0, channels[i].modulationRange);
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playingModes[i] = clockModes[channels[i].mode - mod]; //subtrackting because the innitiall array is backwards
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}
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//divider
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if (pulseCount == 0 && !beatCounted) {
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for (int i = 0; i<6; i++) {
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playingModes[i] = clockModes[channels[i].mode]; //updated here to prevent sync problems for multipliers
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if (playingModes[i] > 0) {
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if (outsClocksCounts[i] == 0) { //Pulse on 0
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if (channels[i].random == 0 || (channels[i].random == 1 && random(2))) { //random
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digitalWrite(outsPins[i], HIGH);
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}
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}
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if (outsClocksCounts[i] < (playingModes[i] - 1)) {
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outsClocksCounts[i]++;
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} else {
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outsClocksCounts[i] = 0;
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}
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}
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}
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beatCounted = true;
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}
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//multiplier
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for (int i = 0; i<6; i++) {
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if (playingModes[i] < 0) {
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if (outsClocksCounts[i] == 0) { //Pulse on 0
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if (channels[i].random == 0 || (channels[i].random == 1 && random(2))) { //random
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digitalWrite(outsPins[i], HIGH);
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}
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}
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if (outsClocksCounts[i] < (PPQN / abs(playingModes[i])) - 1) {
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outsClocksCounts[i]++;
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} else {
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outsClocksCounts[i] = 0;
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}
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}
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}
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pulseCounted = true;
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}
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//internal pulse
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if (pulseClockCount == 0) {
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pulseCount++;
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beatCounted = false;
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pulseCounted = false;
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}
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if (pulseClockCount < pulsePeriod) {
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pulseClockCount++;
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} else {
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pulseClockCount = 0;
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}
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if (pulseCount >= PPQN) {
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pulseCount = 0;
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}
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// pull low all outputs after set pulse length
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if (pulseClockCount >= PULSE_LENGTH) {
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for (int i = 0; i<6; i++) {
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digitalWrite(outsPins[i], LOW);
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}
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}
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}
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}
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void externalClock() {
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digitalWrite(outsPins[0], !digitalRead(outsPins[0]));
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}
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void updateTiming() {
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pulsePeriod = 60000 / (bpm * PPQN);
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}
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void resetClocks() {
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for (int i = 0; i<6; i++) {
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outsClocksCounts[i] = 0;
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digitalWrite(outsPins[i], LOW); //to avoid stuck leds
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}
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}
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void saveState() {
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EEPROM.put(0, bpm);
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EEPROM.put(sizeof(int), channels);
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}
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void checkInputs() {
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//input jack switcch
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externalClockConnected = digitalRead(INPUT_CONNECTED_PIN);
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if (externalClockConnected != externalClockConnectedOld) {
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//updateScreen();
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externalClockConnectedOld = externalClockConnected;
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Serial.println(externalClockConnected);
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}
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//encoder button
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if (!digitalRead(ENC_BTN_PIN) && !encPressRegistered) {
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encPressRegistered = true;
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encPressedTime = millis();
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} else if (digitalRead(ENC_BTN_PIN) && encPressRegistered) {
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encPressRegistered = false;
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encReleasedTime = millis();
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//Serial.println(encReleasedTime - encPressedTime);
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if (encReleasedTime - encPressedTime < 500) { // press shorter than .5s switches tabs
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if (insideTab == 0) {
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displayTabOld = displayTab;
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displayTab++;
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if (displayTab>6) {
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displayTab = 0;
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}
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} else if (insideTab < 2) {
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insideTab ++;
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} else {
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insideTab = 1;
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}
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updateScreen();
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} else if (encReleasedTime - encPressedTime < 2000 && displayTab != 0) { // longer press (<2s) and switches random mode, longer than 2s presses are ignored
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if (insideTab == 0) {
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insideTab = 1;
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} else {
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insideTab = 0;
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}
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updateScreen();
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}
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}
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//encoder
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encoder.tick();
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int encPosition = encoder.getPosition();
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if (encPositionOld != encPosition) {
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int change = encPositionOld - encPosition;
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if (displayTab == 0) {
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bpm = bpm + change;
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if (bpm > MAXBPM) {
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bpm = MAXBPM;
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} else if (bpm < MINBPM) {
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bpm = MINBPM;
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}
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updateTiming();
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} else if (displayTab != 0 && insideTab == 0) {
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channels[displayTab-1].mode = channels[displayTab-1].mode - change;
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if (channels[displayTab-1].mode < 0) {
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channels[displayTab-1].mode = 0;
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} else if (channels[displayTab-1].mode > (sizeof(clockModes)/sizeof(int)) - 1) {
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channels[displayTab-1].mode = (sizeof(clockModes)/sizeof(int)) - 1;
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}
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needToResetChannel = displayTab-1;
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} else if (displayTab != 0 && insideTab == 1) { //random
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channels[displayTab-1].random = !channels[displayTab-1].random;
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} else if (displayTab != 0 && insideTab == 2) { //modulation
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channels[displayTab-1].modulationRange = channels[displayTab-1].modulationRange + change;
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if (channels[displayTab-1].modulationRange > 6 || channels[displayTab-1].modulationRange < -6) {
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channels[displayTab-1].modulationChannel = !channels[displayTab-1].modulationChannel;
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channels[displayTab-1].modulationRange = 0;
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}
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}
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updateScreen();
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encPositionOld = encPosition;
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}
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//play button
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if (!digitalRead(START_STOP_BTN_PIN) && !playBtnPushed) {
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isPlaying = !isPlaying;
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resetClocks();
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playBtnPushed = true;
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saveState();
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} else if (digitalRead(START_STOP_BTN_PIN) && playBtnPushed) {
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playBtnPushed = false;
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}
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//modulations
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a1Input = analogRead(ANALOGUE_INPUT_1_PIN);
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a2Input = analogRead(ANALOGUE_INPUT_2_PIN);
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}
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void updateScreen() {
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display.clearDisplay();
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//Tabs
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display.drawRect(0, 0, 128, 2, SSD1306_WHITE);
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display.setCursor(0,2);
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display.setTextSize(1);
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if (displayTab == 0) {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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display.print(F(" "));
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display.setTextColor(SSD1306_WHITE);
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display.print(F(" bpm "));
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} else {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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display.print(F(" bpm"));
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}
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for (int i = 1; i <= 6; i++) {
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if (displayTab == i) {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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display.print(" ");
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display.setTextColor(SSD1306_WHITE);
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display.print(" ");
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display.print(i);
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display.print(" ");
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} else {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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display.print(" ");
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display.print(i);
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}
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}
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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//display.println(F(" "));
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display.fillRect(108, 2, 20, 8, SSD1306_WHITE);
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display.println();
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display.println();
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display.fillRect(0, 10, 128, 2, SSD1306_WHITE);
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//Content
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display.setTextSize(3);
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display.setTextColor(SSD1306_WHITE);
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if (displayTab == 0) {
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display.print(bpm);
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display.println(F("bpm"));
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} else {
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if (clockModes[channels[displayTab-1].mode] == 0) {
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display.print(F(" OFF"));
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} else if (clockModes[channels[displayTab-1].mode]>0) {
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display.print(F(" /"));
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display.print(abs(clockModes[channels[displayTab-1].mode]));
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} else {
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display.print(F(" x"));
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display.print(abs(clockModes[channels[displayTab-1].mode]));
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}
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}
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display.println();
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display.setTextSize(1);
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display.println();
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//Extra params
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display.setTextSize(1);
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if (displayTab != 0) {
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if (insideTab == 1) {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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} else {
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display.setTextColor(SSD1306_WHITE);
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}
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display.print(F(" RND:"));
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if (channels[displayTab-1].random) {
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display.print(F("On "));
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} else {
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display.print(F("Off "));
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}
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display.setCursor(60,50);
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if (insideTab == 2) {
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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} else {
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display.setTextColor(SSD1306_WHITE);
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}
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display.print(F(" MOD:"));
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if (channels[displayTab-1].modulationChannel && channels[displayTab-1].modulationRange != 0) {
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display.print(F("A2 "));
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if (channels[displayTab-1].modulationRange > 0) {
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display.print(F("+"));
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}
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display.print(channels[displayTab-1].modulationRange);
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display.print(F(" "));
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} else if (!channels[displayTab-1].modulationChannel && channels[displayTab-1].modulationRange != 0) {
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display.print(F("A1 "));
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if (channels[displayTab-1].modulationRange > 0) {
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display.print(F("+"));
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}
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display.print(channels[displayTab-1].modulationRange);
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display.print(F(" "));
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} else {
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display.print(F("Off "));
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}
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}
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display.display();
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} |