sampler at 80 percent

soundcube-firmware/soundcube-firmware.ino

@@ -1,4 +1,3 @@
-
 #include <ArduinoJson.h>
 #include <ArduinoJson.hpp>
 
@@ -19,14 +18,12 @@
 #define UI_SAMPLERATE 22050
 
 #define BUFFERSIZE 64
-#define NSTREAMS 8
+#define NSTREAMS 16
 
 int16_t buffer[BUFFERSIZE];
 
 WaveStream stream[NSTREAMS];
 
-bool streams_loaded = false;
-
 I2S i2s(INPUT_PULLUP);
 
 TLV320AIC3204 codec;
@@ -38,16 +35,24 @@ DAC8552 dac(9, &SPI1);
 
 PWMAudio ui_snd(8);
 
-enum BUTTON {CVINL, CVINR, INL, INR, OUTR, OUTL, CVOUTR, CVOUTL, RIGHT, LEFT, SELECT, DEBUG1, DEBUG2, DEBUG3};
+enum STATE {BANK, SAMPLE, SEQUENCE, CTEMPO};
+STATE state = BANK;
+
+//enum BUTTON {CVINL, CVINR, INL, INR, OUTR, OUTL, CVOUTR, CVOUTL, RIGHT, LEFT, SELECT, DEBUG1, DEBUG2, DEBUG3};
+enum BUTTON {MODE, LOOP, INL, INR, OUTR, OUTL, TEMPO, RESET, BACK, POWER, SELECT, DEBUG1, DEBUG2, DEBUG3};
 
 int lut_ring_cw[48] = {39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,50,49,48,47,46,45,44,43,42,41,40};
 int lut_ring_ccw[48] = {40,41,42,43,44,45,46,47,48,49,50,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39};
 int lut_matrix[13] = {56,55,57,58,59,62,61,60,63,64,65,67,66};
 
+int lut_banks[4] = {56,55,67,66};
+int lut_samples[4] = {62,58,60,64};
+
 int active = 0;
 int active_led_ring = 0;
 
-bool speakerToggle = false;
+int selected_bank = 0;
+int selected_sample = 0;
 
 uint32_t lastTime = 0;
 int32_t position = 0;
@@ -56,13 +61,18 @@ CRGB ui_leds[74];
 CRGB edge_leds[11];
 
 volatile bool buttonChanged = false;
-volatile bool ui_click = false;
-volatile bool ui_beep = false;
-volatile bool amp = false;
 
-int counter = 0;
+bool ui_click = false;
+bool ui_beep = false;
+bool amp = false;
+bool streams_loaded = false;
+bool speakerToggle = false;
+bool sd_card_detected = false;
 
 bool buttons[16] = {false};
+int buttonsDir[16] = {0};
+
+int counter = 0;
 
 int16_t ui_click_snd[UI_SAMPLERATE];
 uint16_t click_length = 0;
@@ -70,8 +80,6 @@ uint16_t click_length = 0;
 int16_t ui_beep_snd[UI_SAMPLERATE];
 uint16_t beep_length = 0;
 
-bool sd_card_detected = false;
-
 struct Color {
   int r;
   int g;
@@ -82,12 +90,34 @@ struct Color {
 };
 
 struct Config {
+  String boxid = "";
   Color edge_color = {0,0,50,0,50,0};
   Color ring_color = {0,50,50,0,80,50};
+  String sampleFiles[16];
+  int bpm = 90;
 };
 
 Config config;
 
+struct Sample{
+  float volume = 1.0;
+  WaveStream *file;
+};
+
+Sample samples[NSTREAMS];
+
+struct SequenceStep{
+  int len = 0;
+  Sample *samples[4];
+  void trigger(){
+    for(int i = 0; i < len; i++){
+      samples[i]->file->play(true);
+    }
+  }
+};
+
+SequenceStep steps[16];
+
 void loadConfiguration(Config& config) {
   File file = SD.open("/config.txt");
   JsonDocument doc;
@@ -109,7 +139,13 @@ void loadConfiguration(Config& config) {
   config.ring_color.g_active = doc["ring"]["color"]["active"]["g"] | 80;
   config.ring_color.b_active = doc["ring"]["color"]["active"]["b"] | 50;
 
-  //strlcpy(config.hostname, doc["hostname"] | "example.com", sizeof(config.hostname));
+  JsonArray _sampleFiles = doc["samples"];
+  config.boxid = doc["boxid"].as<String>();
+  int i = 0;
+  for(JsonVariant item : _sampleFiles){
+    config.sampleFiles[i] = item.as<String>();
+    i++;
+  }
 
   file.close();
 }
@@ -190,6 +226,44 @@ bool load_ui_sounds(const char* file, int16_t *buffer, uint16_t &length){
   return false;
 }
 
+bool load_samples(){
+  for(int i = 0; i < NSTREAMS; i++){
+    stream[i].begin();
+    char filename[64];
+    sprintf(filename, "/sound/%s/%s", config.boxid.c_str(), config.sampleFiles[i].c_str());
+    Serial.println(filename);
+
+    if(SD.exists(filename)){
+      bool loaded = stream[i].load(SD.open(filename));
+      if(loaded) {
+        Serial.print("file read: ");
+        Serial.print(stream[i].wavefile.length);
+        Serial.print(" bytes | ");
+        Serial.print(stream[i].wavefile.samplerate);
+        Serial.print(" kHz | ");
+        Serial.print(stream[i].wavefile.bitspersample);
+        Serial.print(" bits | ");
+        Serial.print(stream[i].wavefile.channels);
+        Serial.print(" channels | ");
+        Serial.print(stream[i].wavefile.blockalign);
+        Serial.println(" bytes");
+        //stream[i].wavefile.loop = true;
+      } else {
+        Serial.println("file loading error");
+      }
+    } else {
+      for(int k = 0; k < 3; k++){
+        digitalWrite(6, HIGH);
+        delay(20);
+        digitalWrite(6, LOW);
+        delay(25);
+      }
+      return false;
+    }
+  }
+  return true;
+}
+
 void tca_irq() {
   buttonChanged = true;
 }
@@ -199,6 +273,46 @@ void speaker(bool state){
   digitalWrite(13, state ? HIGH : LOW);
 }
 
+struct Vibration{
+  int32_t last;
+  bool start = false;
+  bool wait = false;
+  uint16_t on = 0;
+  uint16_t off = 0;
+  int n = 1;
+
+  void update(){
+    int32_t delta = millis() - last;
+
+    if(start && !wait){ 
+      digitalWrite(6, HIGH);
+      start = false;
+      wait = true;
+      last = millis();
+    }
+
+    if(delta >= on && wait){
+      digitalWrite(6, LOW);
+      wait = false;
+      n--;
+      last = millis();
+    }
+
+    if(delta >= off && n > 0){
+      start = true;
+      last = millis();
+    }
+  }
+
+  void trigger(int _n, int _on, int _off){
+    n = _n;
+    on = _on;
+    off = _off;
+    start = true;
+  }
+};
+Vibration vibration;
+
 void setup() {
   Serial.begin();
   delay(1000);
@@ -253,7 +367,8 @@ void setup() {
 
   // Rotary Encoder
   ENC.begin();  //  set direction pin.
-  ENC.setDirection(AS5600_COUNTERCLOCK_WISE);
+  ENC.setDirection(AS5600_CLOCK_WISE);
+  ENC.resetCumulativePosition();
 
   pinMode(6, OUTPUT);  // Vibration Motor
   pinMode(7, OUTPUT);  // UI Amp Enable
@@ -291,41 +406,13 @@ void setup() {
   }
 
   if(sdInitialized) {
+    streams_loaded = load_samples();
+  }
+
+  if(streams_loaded) {
     for(int i = 0; i < NSTREAMS; i++){
-      stream[i].begin();
+      samples[i].file = &stream[i];
-      char filename[40];
-      sprintf(filename, "/sound/%d.wav", i+1);
-      if(SD.exists(filename)){
-        bool loaded = stream[i].load(SD.open(filename));
-        
-        if(loaded) {
-          Serial.print("file read: ");
-          Serial.print(stream[i].wavefile.length);
-          Serial.print(" bytes | ");
-          Serial.print(stream[i].wavefile.samplerate);
-          Serial.print(" kHz | ");
-          Serial.print(stream[i].wavefile.bitspersample);
-          Serial.print(" bits | ");
-          Serial.print(stream[i].wavefile.channels);
-          Serial.print(" channels | ");
-          Serial.print(stream[i].wavefile.blockalign);
-          Serial.println(" bytes");
-
-          //stream[i].play();
-          stream[i].wavefile.loop = true;
-        } else {
-          Serial.println("file loading error");
     }
-      } else {
-        for(int k = 0; k < 3; k++){
-          digitalWrite(6, HIGH);
-          delay(100);
-          digitalWrite(6, LOW);
-          delay(50);
-        }
-      }
-    }
-    streams_loaded = true;
   }
 
   digitalWrite(6, HIGH);
@@ -337,14 +424,49 @@ void setup() {
   digitalWrite(6, LOW);
 }
 
-bool dactest = false;
+uint32_t last = 0;
+int bar = 0;
+int bar_old = -1;
+int set_bar = 0;
+int16_t angle = 0;
+int32_t position_last = 0;
+
+int16_t encdelta_raw = 0;
+int16_t encdeltadiv = 512;
 
 void loop() {
   position = ENC.getCumulativePosition();
+  angle = ENC.readAngle();
+  encdelta_raw += (position - position_last);
+
+  // Serial.print(encdelta_raw);
+  // Serial.print(" \t");
+
+  int encdelta = 0;
+  if(abs(encdelta_raw) > encdeltadiv) {
+    encdelta = encdelta_raw > 0 ? 1 : -1;
+    encdelta_raw = 0;
+  }
+
+  // Serial.print(angle);
+  // Serial.print(" \t");
+  // Serial.print(position);
+  // Serial.print(" \t");
+  // Serial.print(position_last);
+  // Serial.print(" \t");
+  // Serial.print(encdelta_raw);
+  // Serial.print(" \t");
+  // Serial.println(encdelta);
+
+  uint32_t delta_bpm = floor((60000 / config.bpm) / 16);
+
+  if(millis() - last >= delta_bpm) {
+    bar = (bar + 1) % 16;
+    last = millis();
+  }
 
   sd_card_detected = !digitalRead(21);
-  if(sd_card_detected) edge_leds[8] = CRGB(0,10,0);
+  edge_leds[8] = sd_card_detected ? CRGB(0,10,0) : CRGB(10,0,0);
-  if(!sd_card_detected) edge_leds[8] = CRGB(10,0,0);
 
   // EDGE LEDs
   for (int i = 0; i < 8; i++) {
@@ -366,101 +488,184 @@ void loop() {
     int buttonValues = TCA.read16();
     
     bool buttonsNew[16] = {false};
-    int buttonsDir[16] = {0};
 
     bool buttonUp = false;
     bool buttonDown = false;
+
     for(int i = 0; i < 16; i++){
       buttonsNew[i] = ~(buttonValues >> i) & 0x01;
       if(buttonsNew[i] == true && buttons[i] == false) {
-        buttonsDir[i] = 1;
+        buttonsDir[i] = -1;
         buttonDown = true;
       }
       if(buttonsNew[i] == false && buttons[i] == true) {
-        buttonsDir[i] = -1;
+        buttonsDir[i] = 1;
         buttonUp = true;
       }
       buttons[i] = buttonsNew[i];
     }
     
     // Make vibration
-    if (HAPTIC && buttonDown) {
+    if(HAPTIC && buttonDown) {
-      digitalWrite(6, HIGH);
+      vibration.trigger(1, 25, 25);
-      delay(50);
-      digitalWrite(6, LOW);
     }
 
     // Make beep
-    if (AURAL && buttonDown) {
+    if(AURAL && buttonDown) {
       digitalWrite(7, HIGH);
       ui_click = true;
     }
 
+    if(buttons[TEMPO] && buttonDown){
+      state = CTEMPO;
+    }
+
+    if(buttons[BACK] && buttonDown){
+    }
+
+    switch(state){
+      case BANK:
+        encdeltadiv = 512;
+        encdelta_raw = 0;
+        encdelta = 0;
+        if(buttons[SELECT] && buttonDown){
+          state = SAMPLE;
+        }
+        break;
+      case SAMPLE:
+        encdeltadiv = 512;
+        encdelta_raw = 0;
+        encdelta = 0;
+        if(buttons[SELECT] && buttonDown){
+          state = SEQUENCE;
+        }
+        if(buttons[BACK] && buttonDown){
+          state = BANK;
+        }
+        break;
+      case SEQUENCE:
+        encdeltadiv = 256;
+        encdelta_raw = 0;
+        encdelta = 0;
+        if(buttons[SELECT] && buttonDown){
+          int n = steps[set_bar].len;
+          steps[set_bar].samples[n] = &samples[selected_bank*4 + selected_sample];
+          steps[set_bar].len = (steps[set_bar].len + 1) % 4;
+        }
+        if(buttons[BACK] && buttonDown){
+          state = SAMPLE;
+        }
+        break;
+      case CTEMPO:
+        encdeltadiv = 64;
+        encdelta_raw = 0;
+        encdelta = 0;
+        if(buttons[SELECT] && buttonDown){
+          state = BANK;      
+        }
+        if(buttons[BACK] && buttonDown){
+          state = BANK;
+        }
+        break;
+    }
+
+    // Set bar
+    // if(buttons[BACK]) set_bar++;
+    // if(buttons[POWER]) set_bar--;
+   
+    if(buttons[SELECT]){
       // Flash encoder leds
       ui_leds[0] = CRGB(0, 100, 50);
       ui_leds[1] = CRGB(0, 100, 50);
       ui_leds[2] = CRGB(0, 100, 50);
+    }
     
-    // Switch through LED matrix
+    if(buttons[DEBUG1]) {
-    if(buttons[RIGHT]) active++;
-    if(buttons[LEFT]) active--;
-    if(active == 13) active = 0;
-    if(active == -1) active = 12;
-    
-    if(buttons[CVINL]) {
       Serial.println("vol down");
       codec.volumeDown();
     }
 
-    if(buttons[CVOUTL]) {
+    if(buttons[DEBUG3]) {
       Serial.println("vol up");
       codec.volumeUp();
     }
 
-    if(buttons[DEBUG3]) {
+    if(buttons[DEBUG2]) {
       speakerToggle = !speakerToggle;
       speaker(speakerToggle);
     }
 
-    if(buttons[DEBUG2]) {
-      dactest = !dactest;
-      dac.setValue(0, dactest ? 0 : 32768);
-      dac.setValue(1, !dactest ? 0 : 65535);
-    }
-
-    if(buttons[SELECT]){
-      stream[active % NSTREAMS].toggle();
-      ui_beep = true;
-    }
 
     Serial.println(codec.getVolumeL());
 
-    //for(int i = 0; i < NSTREAMS; i++){
-    //  stream[i].pause();  
-   // }
-    //stream[active % NSTREAMS].play();
-
     buttonChanged = false;
   }
 
+//  if(position < 0) position += 4096;
+ 
+  switch(state){
+    case BANK:
+      selected_bank += encdelta;
+      if(selected_bank == 4) selected_bank = 0;
+      if(selected_bank == -1) selected_bank = 3;
+      break;
+    case SAMPLE:
+      selected_sample += encdelta;
+      if(selected_sample == 4) selected_sample = 0;
+      if(selected_sample == -1) selected_sample = 3;
+      break;
+    case SEQUENCE:
+      set_bar += encdelta;
+      if(set_bar == 16) set_bar = 0;
+      if(set_bar == -1) set_bar = 15;
+      break;
+    case CTEMPO:
+      config.bpm += encdelta;
+      if(config.bpm < 15) config.bpm = 15;
+      if(config.bpm > 300) config.bpm = 300;
+      break;
+  }
+
+
   //dac.setValue(0, dactest ? 0 : sin((float)millis() / 100.0f) * 32768 + 32768);
 
   // empty LED matrix
-  for (int i = 0; i < 13; i++) {
+  for (int i = 0; i < 4; i++) {
-    ui_leds[lut_matrix[i]] = CRGB(0, 0, 0);
+    ui_leds[lut_banks[i]] = CRGB(0, 0, 0);
-    if(stream[i % NSTREAMS].isPlaying()) ui_leds[lut_matrix[i % NSTREAMS]] = CRGB(0, 50, 0);
+    ui_leds[lut_samples[i]] = CRGB(0,0,0);
   }
   
   // set active LED matrix LED
-  ui_leds[lut_matrix[active]] = CRGB(100, 100, 100);
+  ui_leds[lut_banks[selected_bank]] = CRGB(100, 50, 50);
+  ui_leds[lut_samples[selected_sample]] = CRGB(100, 0, 50);
 
-  if(position < 0) position += 4096;
+  for(int i = 0; i < 48; i++){
-  active_led_ring = (position / 32) % 48;
+    int step = floor(i/3);
-  
+    if(step == set_bar){
-  // set active LED ring LED
+      ui_leds[lut_ring_cw[i]] = CRGB(config.ring_color.r_active, config.ring_color.g_active, config.ring_color.b_active);
-  for(int i = 0; i < active_led_ring; i++){
-    ui_leds[lut_ring_ccw[i]] = CRGB(config.ring_color.r, config.ring_color.g, config.ring_color.b);
     }
+    if(step == bar){
+      ui_leds[lut_ring_cw[i]] = CRGB(config.ring_color.r, config.ring_color.g, config.ring_color.b);
+    }
+    if(steps[step].len > 0) {
+      ui_leds[lut_ring_cw[i]] = CRGB(0, 10, 0);
+    }
+
+  }
+
+  if(bar != bar_old){
+    if(steps[bar].len > 0) {
+      steps[bar].trigger();
+      Serial.print("trigger ");
+      Serial.println(bar);
+    }
+  }
+
+  
+  // // set active LED ring LED
+  // for(int i = 0; i < active_led_ring; i++){
+  //   ui_leds[lut_ring_ccw[i]] = CRGB(config.ring_color.r, config.ring_color.g, config.ring_color.b);
+  // }
 
   FastLED.show();
   if(streams_loaded) {
@@ -469,9 +674,19 @@ void loop() {
     }
   }
 
+  if(buttonChanged){
+    for(int i = 0; i < 16; i++){
+      if(buttonsDir[i] == 1) buttonsDir[i] = 0;
+    }
+  }
+
   if(i2s.getOverflow()) Serial.println("overflow");
   if(i2s.getUnderflow()) Serial.println("underflow");
 
   //delay(20); // wait 1ms
-
+  bar_old = bar;
+  vibration.update();
+  position_last = position;
 }
+
+

soundcube-firmware/wavestream.h

@@ -74,16 +74,21 @@ struct WaveFile{
     return true;
   }
   
-  void readblock(){
+  bool readblock(){
     uint8_t samplebyte[blockalign];
 
     file.read(samplebyte, blockalign);
     if(!file.available() && loop) file.seek(44, SeekSet);
+    if(!file.available() && !loop) {
+      file.seek(44, SeekSet);
+      return false;
+    }
     
     for(int i = 0; i < blockalign; i+=2){
       int16_t sample = (samplebyte[i+1] << 8) + samplebyte[i];
       buffer.push(sample);
     }
+    return true;
   }
 
   int16_t get(){
@@ -94,6 +99,10 @@ struct WaveFile{
     file.seek(44, SeekSet);
   }
 
+  void reset(){
+    file.seek(44, SeekSet);
+  }
+
   bool loop = false;
   uint16_t format = 0;
   uint32_t length = 0;  
@@ -110,7 +119,7 @@ class WaveStream{
     WaveStream(){}
 
     void begin(){
-      wavefile.buffer.setSize(24000);
+      wavefile.buffer.setSize(8000);
       wavefile.buffer.begin();
     }
 
@@ -121,7 +130,10 @@ class WaveStream{
 
     void toggle(){playing = !playing;}
 
-    void play(){playing = true;}
+    void play(bool reset = false){
+      if(reset) wavefile.reset();
+      playing = true;
+    }
 
     void stop(){
       playing = false;
@@ -134,7 +146,8 @@ class WaveStream{
       if(!wavefile.buffer.isFull() && playing){
         int cnt = 0;
         while (!wavefile.buffer.isFull() && cnt < 6000) {
-          wavefile.readblock();
+          bool ok = wavefile.readblock();
+          if(!ok) playing = false;
           cnt++;
         }
       }