287 lines
7.5 KiB
C++
287 lines
7.5 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 //24 is a standart for midi
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#define PULSE_LENGTH 5
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#define MAXBPM 250 //250 at 24ppqn 5ms pulse will be 50/50 square wave
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#define MINBPM 20
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#define INPUT_CONNECTED_PIN 12
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#define INPUT_PIN 2
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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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const int outsPins[6] = {5, 6, 7, 8, 9, 10};
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const int outsModes[22] = {-24, -16, -12, -8, -6, -4, -3, -2, -1, 0, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 16, 32, 100}; //positive - divide, negative - multiply, 0 - off, 100 - random
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int outsModeIndex[6] = {10, 8, 12, 14, 9, 8}; //10 - /1, 9 - off
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int outsPeriods[6];
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int outsClocksCounts[6];
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int outsModesPlay[6]; //actual channel modes array updated from outsModeIndex each beat
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bool clockMode;
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bool clockModeOld;
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int inputMode; //clock, reset, start/stop
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int clockCount = 0;
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int bpm = 130;
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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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bool needToChangeTab = 0;
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bool buttonPushed = false;
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int a1Input = 0;
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bool changesSaved;
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int encPositionOld = 0;
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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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pinMode(INPUT_CONNECTED_PIN, INPUT_PULLUP);
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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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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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updatePeriod();
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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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//divider
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if (pulseCount == 0 && !beatCounted) {
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for (int i = 0; i<6; i++) {
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outsModesPlay[i] = outsModes[outsModeIndex[i]]; //updated here to prevent sync problems for multipliers
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if (a1Input != 0 && i == 5) { //TESTING THE MODULATION ON 6th CHANNEL
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outsModesPlay[i] = outsModes[outsModeIndex[i] - a1Input];
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}
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if (outsModesPlay[i] > 0 && outsModesPlay[i] != 100) {
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if (outsClocksCounts[i] == 0) { //Pulse on 0
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digitalWrite(outsPins[i], HIGH);
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}
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if (outsClocksCounts[i] < (outsModesPlay[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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} else if (outsModesPlay[i] == 100) { //random
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if (outsClocksCounts[i] == 0) {
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if (random(2)) { // random(2) gives either 0 or 1, so it's 50/50 chance
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digitalWrite(outsPins[i], HIGH);
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}
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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 (outsModesPlay[i] < 0) {
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if (outsClocksCounts[i] == 0) { //Pulse on 0
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digitalWrite(outsPins[i], HIGH);
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}
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if (outsClocksCounts[i] < (PPQN / abs(outsModesPlay[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 updatePeriod() {
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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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}
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}
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void checkInputs() {
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//input jack switcch
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clockMode = digitalRead(INPUT_CONNECTED_PIN);
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if (clockMode != clockModeOld) {
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updateScreen();
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clockModeOld = clockMode;
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}
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//encoder button
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if (needToChangeTab == 0 && digitalRead(ENC_BTN_PIN) == 0) {
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needToChangeTab = 1;
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} else if (needToChangeTab == 1 && digitalRead(ENC_BTN_PIN) == 1) {
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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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needToChangeTab = 0;
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updateScreen();
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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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updatePeriod();
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} else {
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outsModeIndex[displayTab-1] = outsModeIndex[displayTab-1] + change;
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if (outsModeIndex[displayTab-1] < 0) {
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outsModeIndex[displayTab-1] = 0;
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} else if (outsModeIndex[displayTab-1] > (sizeof(outsModes)/sizeof(int)) - 1) {
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outsModeIndex[displayTab-1] = (sizeof(outsModes)/sizeof(int)) - 1;
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}
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needToResetChannel = displayTab-1;
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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) && !buttonPushed) {
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isPlaying = !isPlaying;
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resetClocks();
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buttonPushed = true;
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} else if (digitalRead(START_STOP_BTN_PIN) && buttonPushed) {
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buttonPushed = false;
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}
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//modulations
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a1Input = analogRead(ANALOGUE_INPUT_1_PIN);
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a1Input = map (a1Input, 0, 1023, 0, 4);
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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.setCursor(0,0);
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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.println();
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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 (outsModes[outsModeIndex[displayTab-1]] == 0) {
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display.print(F("OFF"));
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} else if (outsModes[outsModeIndex[displayTab-1]] == 100) {
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display.print(F("/RANDOM"));
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} else if (outsModes[outsModeIndex[displayTab-1]]>0) {
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display.print(F("/"));
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display.print(abs(outsModes[outsModeIndex[displayTab-1]]));
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} else {
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display.print(F("x"));
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display.print(abs(outsModes[outsModeIndex[displayTab-1]]));
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}
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}
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display.display();
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} |