389 lines
12 KiB
C++
389 lines
12 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 VERSION "0.9b"
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#define SCREEN_ADDRESS 0x3C
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#define PPQN 24
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#define PULSE_LENGTH 12 //ms (with 12 ms you can't get higher than 208bpm)
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#define MAXBPM 200 //250 at 24ppqn with 5ms pulse will be 50/50 square wave
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#define MINBPM 20
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#define SCREEN_TIMEOUT 600000 //Turn display off after 5 min
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/* Rev 1 Config
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#define ENC_BTN_PIN 14
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#define ENC_D1_PIN 17
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#define ENC_D2_PIN 4
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#define START_STOP_BTN_PIN 5
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#define EXT_INPUT_PIN 2 //needs to be an interrupt pin
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#define ANALOGUE_INPUT_1_PIN A2
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#define ANALOGUE_INPUT_2_PIN A1
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const int outsPins[6] = {6, 11, 7, 10, 8, 9};
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*/
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// Rev 2 and 3 Config
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#define ENC_BTN_PIN 14
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#define ENC_D1_PIN 17
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#define ENC_D2_PIN 4
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#define START_STOP_BTN_PIN 5
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#define SHIFT_BTN_PIN 12
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#define EXT_INPUT_PIN 2 //needs to be an interrupt pin
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#define ANALOGUE_INPUT_1_PIN A7
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#define ANALOGUE_INPUT_2_PIN A6
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const byte outsPins[6] = { 7, 8, 10, 6, 9, 11 };
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const int subDivs[17] = { -24, -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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byte bpm = 130;
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byte bpmModulationChannel = 200; //0 - CV1, 1 - CV2, 255 - OFF
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byte bpmModulationRange = 0;
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struct channel {
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byte mode; //0 - CLK, 1 - RND, 2 - SEQ
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byte subDiv;
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byte CV1Target; //0 - Off, 1 - Subdiv, 2 - RND, 3 - SeqPattern
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byte CV1Value;
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byte CV2Target;
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byte CV2Value;
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byte offset;
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byte random;
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byte seqPattern;
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};
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channel channels[6] = { //array of channel settings
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 },
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 },
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 },
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 },
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 },
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{ 0, 7, 0, 3, 0, 3, 0, 0, 0 }
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};
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bool sequences[8][16] {
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0}
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};
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byte seqStepCount[8] = {0,0,0,0,0,0,0,0};
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byte memCode = 'A'; //Change to different letter if you changed the data structure
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int channelPulseCount[6];
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int channelPulsesPerCycle[6];
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int playingModes[6]; //actual channel modes array updated from channels object on each beat
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unsigned int pulsePeriod;
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bool isPlaying = false;
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unsigned int tickCount = 0;
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unsigned int pulseCount = 0;
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unsigned int extTriggerCount = 0;
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byte extResetCountdown = 0;
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byte masterClockMode = 0; // 0 - internal, 1 - external 24ppqn, 2 - external beat
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unsigned long lastExtPulseTime;
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unsigned long newExtPulseTime;
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bool needPulseReset[6] = { true, true, true, true, true, true };
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unsigned int displayTab = 0;
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unsigned int displayTabOld;
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bool insideTab = false;
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unsigned int menuItem = 0;
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unsigned int lastMenuItem = 3;
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bool playBtnPushed = false;
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bool shiftBtnPushed = 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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unsigned long lastInteractionTime; // used for display timeout
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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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const unsigned char splash_logo[] PROGMEM = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x07, 0xf8, 0x03, 0xff, 0xc0, 0x03, 0xf8, 0x1f, 0x00, 0x7c, 0x7c, 0x3f, 0xff, 0xc7, 0xc0, 0x3e,
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0x0f, 0xfe, 0x03, 0xff, 0xe0, 0x07, 0xf8, 0x0f, 0x00, 0x78, 0x7c, 0x3f, 0xff, 0xc3, 0xe0, 0x7c,
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0x1f, 0xff, 0x03, 0xff, 0xf0, 0x07, 0xf8, 0x0f, 0x80, 0xf8, 0x7c, 0x3f, 0xff, 0xc3, 0xe0, 0x78,
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0x3f, 0xff, 0x03, 0xff, 0xf8, 0x07, 0xfc, 0x0f, 0x80, 0xf8, 0x7c, 0x3f, 0xff, 0xc1, 0xf0, 0xf8,
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0x7e, 0x0f, 0x83, 0xe0, 0xf8, 0x0f, 0x3c, 0x07, 0x80, 0xf0, 0x7c, 0x00, 0xf8, 0x00, 0xf8, 0xf0,
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0x7c, 0x07, 0x83, 0xe0, 0x78, 0x0f, 0x3c, 0x07, 0xc0, 0xf0, 0x7c, 0x00, 0xf0, 0x00, 0xf9, 0xf0,
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0x7c, 0x00, 0x03, 0xe0, 0xf8, 0x0f, 0x3e, 0x07, 0xc1, 0xf0, 0x7c, 0x00, 0xf0, 0x00, 0x7d, 0xe0,
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0x78, 0x00, 0x03, 0xe0, 0xf8, 0x1e, 0x1e, 0x03, 0xc1, 0xe0, 0x7c, 0x00, 0xf0, 0x00, 0x7f, 0xc0,
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0x78, 0x3f, 0xc3, 0xff, 0xf0, 0x1e, 0x1e, 0x03, 0xe1, 0xe0, 0x7c, 0x00, 0xf0, 0x00, 0x3f, 0xc0,
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0x78, 0x3f, 0xc3, 0xff, 0xe0, 0x1e, 0x1f, 0x01, 0xe3, 0xe0, 0x7c, 0x00, 0xf0, 0x00, 0x1f, 0x80,
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0x78, 0x3f, 0xc3, 0xff, 0xc0, 0x3e, 0x1f, 0x01, 0xe3, 0xc0, 0x7c, 0x00, 0xf0, 0x00, 0x1f, 0x80,
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0x7c, 0x3f, 0xc3, 0xe7, 0xc0, 0x3f, 0xff, 0x01, 0xf3, 0xc0, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x7e, 0x07, 0xc3, 0xe3, 0xe0, 0x3f, 0xff, 0x80, 0xf7, 0xc0, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x3f, 0x1f, 0xc3, 0xe1, 0xe0, 0x7f, 0xff, 0x80, 0xff, 0x80, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x1f, 0xff, 0xc3, 0xe1, 0xf0, 0x78, 0x07, 0x80, 0xff, 0x80, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x0f, 0xff, 0xc3, 0xe0, 0xf8, 0xf8, 0x07, 0xc0, 0x7f, 0x00, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x07, 0xf3, 0xc3, 0xe0, 0xf8, 0xf8, 0x07, 0xc0, 0x7f, 0x00, 0x7c, 0x00, 0xf0, 0x00, 0x0f, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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void setup() {
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Serial.begin(9600);
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//check last bit in eeprom to know if the correct settings were stored
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if (EEPROM.read(1023) == memCode) {
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int addr = 0;
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EEPROM.get(addr, bpm);
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addr = addr + sizeof(bpm);
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EEPROM.get(addr, bpmModulationChannel);
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addr = addr + sizeof(bpmModulationChannel);
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EEPROM.get(addr, bpmModulationRange);
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addr = addr + sizeof(bpmModulationRange);
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EEPROM.get(addr, masterClockMode);
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addr = addr + sizeof(masterClockMode);
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EEPROM.get(addr, channels);
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} else {
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saveState();
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EEPROM.write(1023, memCode);
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}
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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(SHIFT_BTN_PIN, INPUT_PULLUP);
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pinMode(EXT_INPUT_PIN, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(EXT_INPUT_PIN), externalClock, FALLING);
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for (byte 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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display.setRotation(2);
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display.clearDisplay();
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//Splash screen
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display.drawBitmap(0, 16, splash_logo, 128, 19, 1);
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display.setCursor(0, 56);
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display.setTextSize(1);
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display.setTextColor(SSD1306_WHITE);
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display.print(F("V:"));
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display.print(F(VERSION));
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display.display();
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delay(800);
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updateScreen();
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calculateCycles();
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calculateBPMTiming();
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FlexiTimer2::set(1, 1.0 / 1000, clock); // 1.0/1000 = 1ms period. If other than 1ms calculateBPMTiming() might need tweaking
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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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/*if ((millis() - lastInteractionTime) > SCREEN_TIMEOUT) {
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display.clearDisplay();
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display.display();
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if (masterClockMode == 2 || masterClockMode == 3) {
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calculateBPMTiming();
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}}*/
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}
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void clock() {
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if (isPlaying) {
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// Action on each pulse
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if (tickCount == 0) {
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sendTriggers();
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}
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//this part gets the Pulse and Ticks ticking
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//it's placed after the triggers to avoid problems on the start (when pulseCount==0)
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tickCount++;
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if (masterClockMode == 0) {
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if (tickCount >= pulsePeriod) {
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tickCount = 0;
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if (pulseCount < (PPQN - 1)) { //-1 is here to avoid extra IF to reset to 0
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pulseCount++;
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} else {
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pulseCount = 0;
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}
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if (bpmModulationRange != 0) {
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calculateBPMTiming();
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}
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}
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}
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// pull low all outputs after set pulse length
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if (tickCount >= PULSE_LENGTH) {
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for (byte 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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lastExtPulseTime = newExtPulseTime;
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newExtPulseTime = millis();
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if (masterClockMode == 1) { // EXT-24
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//reset cycles if there was no pulses for a while
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if ((newExtPulseTime - lastExtPulseTime) > 125) { //125ms is 20bpm
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for (byte i = 0; i < 6; i++) {
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channelPulseCount[i] = 0;
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}
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}
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if (!isPlaying) {
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isPlaying = true;
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}
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tickCount = 0; //to make things happen in the main clock function
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if (pulseCount < (PPQN - 1)) {
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pulseCount++;
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} else {
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pulseCount = 0;
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}
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}
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}
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void sendTriggers() {
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for (byte i = 0; i < 6; i++) {
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if (playingModes[i] != subDivs[channels[i].subDiv]) {
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needPulseReset[i] = true;
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}
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}
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//switching modes on the beat and resetting channel clock
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if (pulseCount == 0) {
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calculateCycles();
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for (byte i = 0; i < 6; i++) {
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if (needPulseReset[i] == true) {
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channelPulseCount[i] = 0;
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needPulseReset[i] = false;
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}
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}
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}
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//multiplier
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for (byte i = 0; i < 6; i++) {
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int currentSeq = channels[i].seqPattern;
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//RND modulation
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byte randMod = 0;
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if (channels[i].CV1Target == 2) {
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randMod = randMod + a1Input;
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}
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if (channels[i].CV2Target == 2) {
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randMod = randMod + a2Input;
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}
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if (channels[i].CV1Target == 2 || channels[i].CV2Target == 2) {
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randMod = map(randMod, 0, 1023, -5, +5);
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}
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byte randAmount = channels[i].random + randMod;
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if (randAmount > 100) {
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randAmount = 0;
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} else if (randAmount > 10) {
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randAmount = 10;
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}
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if ((channels[i].mode == 0 && channelPulseCount[i] == channels[i].offset) || //CLK with offset
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(channels[i].mode == 1 && channelPulseCount[i] == 0 && (random(10) + 1) > randAmount) //|| //RND
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//(channels[i].mode == 2 && channelPulseCount[i] == 0 && sequences[currentSeq][0]) //SEQ (for some reason doesn't lke variables inside the index)
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) {
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digitalWrite(outsPins[i], HIGH);
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}
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if (channelPulseCount[i] < channelPulsesPerCycle[i]) {
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channelPulseCount[i]++;
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} else {
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channelPulseCount[i] = 0;
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}
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}
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}
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void calculateCycles() {
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for (byte i = 0; i < 6; i++) {
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if (channels[i].CV1Target != 1 && channels[i].CV2Target != 1) {
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playingModes[i] = subDivs[channels[i].subDiv];
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} else if (channels[i].CV1Target == 1) { //subdiv modulation happens here
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int mod;
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mod = a1Input;
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mod = map(mod, 0, 1023, (channels[i].CV1Value * -1), channels[i].CV1Value);
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playingModes[i] = subDivs[channels[i].subDiv - mod]; //subtracting because the innitial array is backwards
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} else if (channels[i].CV2Target == 1) {
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int mod;
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mod = a2Input;
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mod = map(mod, 0, 1023, (channels[i].CV2Value * -1), channels[i].CV2Value);
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playingModes[i] = subDivs[channels[i].subDiv - mod];
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}
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if (playingModes[i] > 0) {
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channelPulsesPerCycle[i] = (playingModes[i] * PPQN) - 1;
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} else {
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channelPulsesPerCycle[i] = (PPQN / abs(playingModes[i])) - 1;
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}
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if (channels[i].offset > channelPulsesPerCycle[i]) {
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channels[i].offset = channelPulsesPerCycle[i];
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}
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}
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}
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void calculateBPMTiming() {
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int mod = 0;
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if (masterClockMode == 0) { //Internal clock
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if (bpmModulationRange != 0 && bpmModulationChannel == 0) {
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mod = map(a1Input, 0, 1023, bpmModulationRange * -10, bpmModulationRange * 10);
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} else if (bpmModulationRange != 0 && bpmModulationChannel == 1) {
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mod = map(a2Input, 0, 1023, bpmModulationRange * -10, bpmModulationRange * 10);
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}
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pulsePeriod = 60000 / ((bpm + mod) * PPQN);
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} else if (masterClockMode == 2) { //for external beat clock
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pulsePeriod = (newExtPulseTime - lastExtPulseTime) / PPQN;
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} else if (masterClockMode == 3) { //for ext 1/16 clock (hardcoded)
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pulsePeriod = (newExtPulseTime - lastExtPulseTime) / 6;
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}
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}
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void resetClocks() {
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for (byte i = 0; i < 6; i++) {
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channelPulseCount[i] = 0;
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digitalWrite(outsPins[i], LOW); //to avoid stuck leds
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}
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pulseCount = 0;
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tickCount = 0;
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}
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void saveState() {
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int addr = 0;
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EEPROM.put(addr, bpm);
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addr = addr + sizeof(bpm);
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EEPROM.put(addr, bpmModulationChannel);
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addr = addr + sizeof(bpmModulationChannel);
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EEPROM.put(addr, bpmModulationRange);
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addr = addr + sizeof(bpmModulationRange);
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EEPROM.put(addr, masterClockMode);
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addr = addr + sizeof(masterClockMode);
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EEPROM.put(addr, channels);
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} |