584 lines
18 KiB
C++
584 lines
18 KiB
C++
#include <Wire.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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#include <U8g2lib.h>
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#include <avr/wdt.h>
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#include <NeoHWSerial.h>
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#include "config.h"
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#include "fonts.h"
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#define VERSION "V:1.2A2"
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uint8_t memCode = '0'; //Change to different letter if you changed the data structure
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uint16_t CV1Calibration = 512;
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uint16_t CV2Calibration = 512;
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bool showDone = false;
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const int subDivs[] = { -24, -12, -8, -6, -4, -3, -2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 24, 32, 64, 128 }; //positive - divide, negative - multiply, 0 - off
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uint8_t bpm = 130;
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uint8_t bpmModulationChannel = 200; //0 - CV1, 1 - CV2, 255 - OFF
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uint8_t bpmModulationRange = 0;
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enum modes {Clock, Random, Sequencer, Swing, Gate};
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struct channel {
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enum modes mode : 3; //mv: 7. 0 - CLK, 1 - RND, 2 - SEQ, 3 - SWING, 4 - Gate
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uint8_t subDiv : 5; //mv: 31
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uint8_t random : 4; //mv: 15
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uint8_t seqPattern : 5;
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uint8_t CV1Target : 3; //0 - Off, 1 - Subdiv, 2 - RND, 3 - SeqPattern
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uint8_t CV2Target : 3;
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uint8_t swing : 3;
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uint8_t offset : 7; //mv: 127
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uint8_t gate : 7;
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bool isMute : 1;
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};
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channel channels[7] = { //array of channel settings
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 },
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{ 0, 7, 0, 0, 0, 0, 0, 0, 1, 0 }
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};
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struct sequence {
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uint32_t sequence;
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uint8_t length : 5 ; //don't forget to add 1 where needed, values 0 - 31
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};
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sequence sequences[] {
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{0b000000000000000001001000100010001, 15},
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{0b000000000000000000000100000010000, 11},
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{0b000000000000000000001001001001001, 6},
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{0b000000000000000001100110011001100, 20},
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{0b000000000000000001110111011101110, 30},
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{0b000000000000000000101010001010100, 31},
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{0b000000000000000000111111111011111, 15},
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{0b000000000000000001101101110110011, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15},
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{0b000000000000000000000000000000000, 15}
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};
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uint8_t currentStep[7] = {0};
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int8_t stepNumSelected = 0;
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uint8_t patternToEdit;
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unsigned int channelPulseCount[7];
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unsigned int channelPulsesPerCycle[7];
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uint8_t sixteenthPulseCount = 0;
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int playingModes[7]; // should be renamed to currentSubdivs or something. Updated from channels object on beat and with applied CV modulation
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int playingModesOld[7];
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uint16_t pulsePeriod;
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bool isPlaying;// = false; // replace with some flags like uint8_t status where 1xxxxxx isPlaying, x1xxxxx isRecording etc
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bool isRecording = false;
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bool recordToNextStep = false;
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bool MIDIClockReceived = false;
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uint16_t tickCount = 0;
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uint16_t pulseCount = 0;
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uint8_t masterClockMode = 0; // 0 - internal, 1 - external 24ppqn, 2 - MIDI
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uint8_t extClockPPQN = 0; // 0 - 24, 1 - 4 (1/16)
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uint8_t extraChannel = 0; // 0 - off, 1 - pulse out = 7th channel
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uint32_t lastExtPulseTime = 0;
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uint32_t newExtPulseTime = 0;
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bool needPulseReset[] = { true, true, true, true, true, true, true }; //to optimise, can be switched to uint8_t
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uint16_t gateLengthTime[] = {0, 0, 0, 0, 0, 0, 0};
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uint16_t gateCountDown[7];
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bool stepIsOdd = 1;
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uint8_t displayTab = 0;
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bool insideTab = false;
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uint8_t menuItem = 0;
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bool menuItemSelected = false;
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uint8_t lastMenuItem = 3;
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uint8_t displayScreen = 0; //0 - main, 1 - sequencer, 2 - settings
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int16_t CV1Input = 0;
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int16_t CV2Input = 0;
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bool playBtnPushed = false;
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bool shiftBtnPushed = false;
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bool encBtnPushed;
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int encPositionOld = 0;
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uint8_t encDirectionOld = 0;
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uint32_t encPressedTime;
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uint32_t encReleasedTime;
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uint32_t playPressedTime;
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uint32_t playReleasedTime;
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uint32_t shiftPressedTime;
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uint32_t shiftReleasedTime;
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int extResetCountdown;
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int extTriggerCount;
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//uint32_t lastInteractionTime; // used for display timeout
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U8G2_SSD1306_128X64_NONAME_2_HW_I2C u8g2(U8G2_R2, SCL, SDA, U8X8_PIN_NONE);
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RotaryEncoder encoder(ENC_D1_PIN, ENC_D2_PIN, RotaryEncoder::LatchMode::TWO03);
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String version;
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void setup() {
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version = F(VERSION);
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NeoSerial.begin(31250);
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NeoSerial.attachInterrupt(receiveMIDI);
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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 (uint8_t i = 0; i < 6; i++) {
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pinMode(outsPins[i], OUTPUT);
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}
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pinMode(clockOutPin, OUTPUT);
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loadState();
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u8g2.begin();
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checkScreenRotation();
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updateScreen();
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calculateCycles();
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calculateBPMTiming();
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resetClocks();
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FlexiTimer2::set(1, 1.0 / 10000, clock); // 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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if (masterClockMode == 1 && extClockPPQN == 1) {
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calculateBPMTiming();
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}
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checkInputs();
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}
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void sendMIDIClock() {
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NeoSerial.write(0xF8);
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}
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void sendMIDIStart() {
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NeoSerial.write(0xFA);
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}
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void sendMIDIStop() {
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NeoSerial.write(0xFC);
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}
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void receiveMIDI( uint8_t msg, uint8_t status ) {
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if (masterClockMode == 2) {
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if (msg == 0xF8) { //Clock tick
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MIDIClockReceived = true;
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} else if (msg == 0xFC) { //stop
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isPlaying = false;
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} else if (msg == 0xFA || msg == 0xFB) { //start and continue
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isPlaying = true;
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}
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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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if (!extraChannel) {
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digitalWrite(clockOutPin, HIGH);
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}
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sendMIDIClock();
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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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for (uint8_t i; i < 7; i++) {
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if (channels[i].mode == Gate) {
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calculateGate(i);
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}
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}
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}
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}
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}
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if (masterClockMode == 1 && extClockPPQN == 1) {
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if (tickCount >= pulsePeriod && pulseCount < (PPQN - 1)) { // ((6 * (extTriggerCount + 1)) - 1)) { //this formula puts it out of sync, so there's PPQN-1 for now
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tickCount = 0;
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pulseCount++;
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}
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}
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if (masterClockMode == 2 && MIDIClockReceived) {
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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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MIDIClockReceived = false;
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}
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// pull low all outputs after set pulse length
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for (uint8_t i = 0; i < 7; i++) {
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if (channels[i].mode != Gate && tickCount >= PULSE_LENGTH) { //everything but gate mode
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digitalWrite(outsPins[i], LOW);
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} else if (channels[i].mode == Gate && tickCount >= gateCountDown[i]) { //gate mode gateLengthTime[i] < pulsePeriod
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digitalWrite(outsPins[i], LOW);
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gateCountDown[i] = gateLengthTime[i];
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} else if (channels[i].mode == Gate && gateCountDown[i] > pulsePeriod && tickCount == 0) {
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gateCountDown[i] = gateCountDown[i] - pulsePeriod;
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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 && extClockPPQN == 0) { // EXT 24ppqn
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if (!isPlaying) {
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isPlaying = true;
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}
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//reset cycles if there were no pulses for a while
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if ((newExtPulseTime - lastExtPulseTime) > 125) { //125ms is 20bpm
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resetClocks();
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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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} else if (masterClockMode == 1 && extClockPPQN == 1) { //EXT 1/16
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if (!isPlaying) {
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isPlaying = true;
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}
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if ((newExtPulseTime - lastExtPulseTime) > 750) {
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resetClocks();
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extResetCountdown = 0;
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extTriggerCount = 0;
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}
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if (extTriggerCount == 0) { //happens on beat
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pulseCount = 0;
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tickCount = 0;
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}
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if (extTriggerCount < 3) {
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extTriggerCount++;
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} else {
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extTriggerCount = 0;
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}
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if (extResetCountdown < 4) { //reset on the second beat (5th pulse), so that BPM is already calculated correctly
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extResetCountdown++;
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} else if (extResetCountdown == 4) {
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resetClocks();
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extResetCountdown++; //to get out of the loop
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}
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}
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}
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void sendTriggers() { //rename to onPulse or something
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for (uint8_t i = 0; i < (extraChannel ? 7 : 6); i++) {
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if (playingModes[i] != subDivs[channels[i].subDiv] && playingModesOld[i] != playingModes[i]) {
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needPulseReset[i] = true;
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playingModesOld[i] = playingModes[i];
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}
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}
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//16th notes for sequencer and swing
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if (sixteenthPulseCount == 0) {
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stepIsOdd = !stepIsOdd;
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for (uint8_t i = 0; i < (extraChannel ? 7 : 6); i++) {
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//pattern modulation
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int seqMod = 0;
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uint8_t seqPattern;
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if (channels[i].CV2Target == 3) {
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seqMod = map(CV2Input, -1, 1024, -8, 8); //-1 and 1024 are to try to make the last step not at max value (should make the range from -7 to +7)
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} else if (channels[i].CV1Target == 3) {
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seqMod = map(CV1Input, -1, 1024, -8, 8);
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}
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if (channels[i].seqPattern < 8 && channels[i].seqPattern + seqMod >= 8) {
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seqPattern = 7;
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} else if (channels[i].seqPattern < 8 && channels[i].seqPattern + seqMod < 0) {
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seqPattern = 0;
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} else if (channels[i].seqPattern >= 8 && channels[i].seqPattern + seqMod < 8) {
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seqPattern = 8;
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} else if (channels[i].seqPattern >= 8 && channels[i].seqPattern + seqMod >= 16) {
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seqPattern = 15;
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} else {
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seqPattern = channels[i].seqPattern + seqMod;
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}
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bool currentStepValue = bitRead(sequences[channels[i].seqPattern].sequence, currentStep[i]);
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if (channels[i].mode == Sequencer && currentStepValue && !channels[i].isMute) {
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digitalWrite(outsPins[i], HIGH);
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}
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}
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}
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if (sixteenthPulseCount < (PPQN / 4) - 1) {
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sixteenthPulseCount++;
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if (sixteenthPulseCount > 3) { //quantization. might need fine-tuning
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recordToNextStep = true;
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}
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} else {
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sixteenthPulseCount = 0;
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for (uint8_t i; i < 7; i++) {
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if (channels[i].mode == Sequencer && currentStep[i] < sequences[channels[i].seqPattern].length) {
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currentStep[i] ++;
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} else {
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currentStep[i] = 0;
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}
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}
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recordToNextStep = false;
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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 (uint8_t i = 0; i < (extraChannel ? 7 : 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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if (channels[i].mode == Gate) {
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calculateGate(i);
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}
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}
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}
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//multiplier
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for (uint8_t i = 0; i < (extraChannel ? 7 : 6); i++) {
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//RND modulation
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uint8_t randMod = 0;
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if (channels[i].CV1Target == 2) {
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randMod = randMod + CV1Input;
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}
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if (channels[i].CV2Target == 2) {
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randMod = randMod + CV2Input;
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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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uint8_t 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].isMute) {
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if ((channels[i].mode == Swing && channelPulseCount[i] == 0 && stepIsOdd == 0)
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|| (channels[i].mode == Swing && channelPulseCount[i] == channels[i].swing && stepIsOdd == 1) //swing
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) {
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digitalWrite(outsPins[i], HIGH);
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}
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if ((channels[i].mode == Clock && channelPulseCount[i] == channels[i].offset) //CLK with offset
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|| (channels[i].mode == Random && channelPulseCount[i] == 0 && (random(10) + 1) > randAmount) //RND
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|| (channels[i].mode == Gate && channelPulseCount[i] == 0) //Gate
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) {
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digitalWrite(outsPins[i], HIGH);
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}
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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 (uint8_t i = 0; i < (extraChannel ? 7 : 6); i++) {
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int mod = 0; //subdiv modulation happens here
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if (channels[i].CV1Target == 1) {
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mod = map(CV1Input, -1, 1024, -5, 5);
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} else if (channels[i].CV2Target == 1) {
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mod = map(CV2Input, -1, 1024, -5, 5);
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}
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playingModes[i] = subDivs[channels[i].subDiv - mod]; //subtracting because the innitial array is backwards
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if (channels[i].mode == Sequencer || channels[i].mode == Swing) { //Sequencer and swing plays 1/16th
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channelPulsesPerCycle[i] = (PPQN / 4) - 1;
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} else if (playingModes[i] > 0) {
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channelPulsesPerCycle[i] = (playingModes[i] * PPQN) - 1;
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} else if (playingModes[i] < 0) {
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channelPulsesPerCycle[i] = (PPQN / abs(playingModes[i])) - 1;
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}
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}
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}
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void calculateGate(uint8_t channel) {
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//if (subDivs[channels[channel].subDiv] > 0) {
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gateLengthTime[channel] = ((channelPulsesPerCycle[channel] + 1) * (pulsePeriod + 1) / 100) * channels[channel].gate;
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gateCountDown[channel] = gateLengthTime[channel];
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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(CV1Input, 0, 1023, bpmModulationRange * -10, bpmModulationRange * 10);
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} else if (bpmModulationRange != 0 && bpmModulationChannel == 1) {
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mod = map(CV2Input, 0, 1023, bpmModulationRange * -10, bpmModulationRange * 10);
|
|
}
|
|
uint8_t calcbpm = bpm + mod;
|
|
if (calcbpm > MAXBPM) { calcbpm = MAXBPM; };
|
|
pulsePeriod = 600000 / (calcbpm * PPQN); // 600000.0 / ((float)(calcbpm * PPQN)) - floats eat up ~2% of program memory, but are they more precise? need to measure
|
|
|
|
} else if (masterClockMode == 1 && extClockPPQN == 1) { //for ext 1/16 clock
|
|
pulsePeriod = (newExtPulseTime - lastExtPulseTime) * 10 / 6;
|
|
}
|
|
}
|
|
|
|
void resetClocks() {
|
|
for (uint8_t i = 0; i < (extraChannel ? 7 : 6); i++) {
|
|
channelPulseCount[i] = 0;
|
|
digitalWrite(outsPins[i], LOW); //to avoid stuck leds
|
|
}
|
|
pulseCount = 0;
|
|
tickCount = 0;
|
|
sixteenthPulseCount = 0;
|
|
for (uint8_t i; i < 7; i++) {
|
|
currentStep[i] = 0;
|
|
}
|
|
stepIsOdd = 1;
|
|
}
|
|
|
|
void saveState() {
|
|
uint16_t addr = 0;
|
|
EEPROM.put(addr, bpm);
|
|
addr = addr + sizeof(bpm);
|
|
EEPROM.put(addr, bpmModulationChannel);
|
|
addr = addr + sizeof(bpmModulationChannel);
|
|
EEPROM.put(addr, bpmModulationRange);
|
|
addr = addr + sizeof(bpmModulationRange);
|
|
EEPROM.put(addr, masterClockMode);
|
|
addr = addr + sizeof(masterClockMode);
|
|
EEPROM.put(addr, channels);
|
|
addr = addr + sizeof(channels);
|
|
EEPROM.put(addr, sequences);
|
|
addr = addr + sizeof(sequences);
|
|
EEPROM.put(addr, CV1Calibration);
|
|
addr = addr + sizeof(CV1Calibration);
|
|
EEPROM.put(addr, CV2Calibration);
|
|
addr = addr + sizeof(CV2Calibration);
|
|
EEPROM.put(addr, rotateScreen);
|
|
addr = addr + sizeof(rotateScreen);
|
|
EEPROM.put(addr, extClockPPQN);
|
|
addr = addr + sizeof(extClockPPQN);
|
|
EEPROM.put(addr, reverseEnc);
|
|
addr = addr + sizeof(reverseEnc);
|
|
EEPROM.put(addr, extraChannel);
|
|
}
|
|
|
|
void loadState() { //optimisation: try to make an abstraction that can take an array (of pointers?) of settings to be loaded/saved
|
|
//check last bit in eeprom to know if the correct settings were stored
|
|
if (EEPROM.read(1023) == memCode) {
|
|
uint16_t addr = 0;
|
|
EEPROM.get(addr, bpm);
|
|
addr = addr + sizeof(bpm);
|
|
EEPROM.get(addr, bpmModulationChannel);
|
|
addr = addr + sizeof(bpmModulationChannel);
|
|
EEPROM.get(addr, bpmModulationRange);
|
|
addr = addr + sizeof(bpmModulationRange);
|
|
EEPROM.get(addr, masterClockMode);
|
|
addr = addr + sizeof(masterClockMode);
|
|
EEPROM.get(addr, channels);
|
|
addr = addr + sizeof(channels);
|
|
EEPROM.get(addr, sequences);
|
|
addr = addr + sizeof(sequences);
|
|
EEPROM.get(addr, CV1Calibration);
|
|
addr = addr + sizeof(CV1Calibration);
|
|
EEPROM.get(addr, CV2Calibration);
|
|
addr = addr + sizeof(CV2Calibration);
|
|
EEPROM.get(addr, rotateScreen);
|
|
addr = addr + sizeof(rotateScreen);
|
|
EEPROM.get(addr, extClockPPQN);
|
|
addr = addr + sizeof(extClockPPQN);
|
|
EEPROM.get(addr, reverseEnc);
|
|
addr = addr + sizeof(reverseEnc);
|
|
EEPROM.get(addr, extraChannel);
|
|
} else {
|
|
saveState(); //write default values to EEPROM
|
|
EEPROM.write(1023, memCode);
|
|
}
|
|
}
|
|
|
|
void reboot() {
|
|
wdt_enable(WDTO_15MS); //reboot after 15ms
|
|
while(true);
|
|
}
|
|
|
|
void calibrateCVs() {
|
|
CV1Calibration = analogRead(ANALOGUE_INPUT_1_PIN);
|
|
CV2Calibration = analogRead(ANALOGUE_INPUT_2_PIN);
|
|
saveState();
|
|
showDone = true;
|
|
updateScreen();
|
|
}
|
|
|
|
void checkScreenRotation() {
|
|
if (rotateScreen) {
|
|
u8g2.setDisplayRotation(U8G2_R0);
|
|
} else {
|
|
u8g2.setDisplayRotation(U8G2_R2);
|
|
}
|
|
} |