Create Neotrellis_M4_Live_Launcher.ino
ADD
Neotrellis_M4_Live_Launcher/Neotrellis_M4_Live_Launcher.ino
+/* Live Launcher - Ableton Live controller for Adafruit Neotrellis M4
+ by Collin Cunningham for Adafruit Industries
+ https://www.adafruit.com/product/3938
+*/
+
+#include <Adafruit_NeoTrellisM4.h>
+
+#define WIDTH 8
+#define HEIGHT 4
+#define N_BUTTONS WIDTH*HEIGHT
+#define NEO_PIN 10
+#define NUM_KEYS 32
+#define SERIAL_TIMEOUT 1000 //time before giving up on incoming serial data
+#define COLOR_DATA_LENGTH 98 //number of total bytes to expect in incoming color data
+//4 bytes per color * 32 buttons = 128 bytes + 2 header bytes = 130 bytes total
+#define BUTTON_DATA_LENGTH 5 //clip playing status message for each button
+#define PULSE_DURATION 350 //length of 'now playing' pulse
+
+unsigned long readTime; //time we start reading serial buffer
+unsigned long lastPulseTime;
+bool pulseOn = false;
+uint8_t packetbuffer[COLOR_DATA_LENGTH]; //store incoming serial data
+uint8_t colors[96];
+
+Adafruit_NeoTrellisM4 trellis = Adafruit_NeoTrellisM4();
+
+const byte ROWS = HEIGHT; // four rows
+const byte COLS = WIDTH; // eight columns
+byte trellisKeys[ROWS][COLS] = { //define the symbols on the buttons of the keypads
+ {1, 2, 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}
+};
+byte rowPins[ROWS] = {14, 15, 16, 17}; //connect to the row pinouts of the keypad
+byte colPins[COLS] = {2, 3, 4, 5, 6, 7, 8, 9}; //connect to the column pinouts of the keypad
+Adafruit_Keypad customKeypad = Adafruit_Keypad( makeKeymap(trellisKeys), rowPins, colPins, ROWS, COLS); //initialize keypad
+extern const uint8_t gamma8[];
+
+boolean pressed[N_BUTTONS] = {false}; // Pressed state for each button
+uint8_t playing[N_BUTTONS] = {0}; // Playing state for each button
+
+void setup() {
+ Serial.begin(57600);
+ // while (!Serial) {}
+
+ trellis.begin();
+ trellis.setBrightness(255);
+ trellis.fill(0);
+}
+
+
+void loop() {
+ unsigned long startTime = millis();
+
+ if (Serial.available() >= BUTTON_DATA_LENGTH) {
+ parseData();
+ }
+
+ //send press events to Live via serial
+ trellis.tick();
+ while (trellis.available()) {
+ keypadEvent e = trellis.read();
+ uint8_t i = e.bit.KEY;
+ if (e.bit.EVENT == KEY_JUST_PRESSED) {
+ pressed[i] = true;
+ Serial.write(i);
+ }
+ else if (e.bit.EVENT == KEY_JUST_RELEASED) {
+ pressed[i] = false;
+ }
+ }
+
+ if ((startTime - lastPulseTime) >= PULSE_DURATION) {
+
+ //flash any clip which is playing
+ if (pulseOn) {
+ for (uint8_t i = 0; i < N_BUTTONS; i++) {
+ setPixelWithColorsIndex(i, false);
+ }
+ }
+ else {
+ for (uint8_t i = 0; i < N_BUTTONS; i++) {
+ if (playing[i]) {
+ setPixelWithColorsIndex(i, true);
+ }
+ else setPixelWithColorsIndex(i, false);
+ }
+ }
+ pulseOn = !pulseOn;
+ lastPulseTime = millis();
+ }
+}
+
+void parseData() {
+
+ //check for ! start char
+ if (Serial.read() == '!') {
+ uint8_t id = Serial.read();
+
+ //check for Color data
+ if (id == 'C') {
+ for (int i = 0; i < 96; i++) {
+ colors[i] = Serial.read();
+ }
+
+ //color button leds
+ for (int i = 0; i < N_BUTTONS; i++) {
+ setPixelWithColorsIndex(i, false);
+ }
+ }
+
+ //check for clip status data
+ else if (id == 'B') {
+ uint8_t x = Serial.read();
+ uint8_t state = Serial.read();
+ uint8_t y = Serial.read();
+
+ if (state == 0) { //if state is 0, all clips in track are stopped
+ for (int i = 0; i < HEIGHT; i++) {
+ uint8_t index = i * WIDTH + x;
+ playing[index] = state;
+ }
+ }
+
+ else { //all other clips in track should stop
+ for (int i = 0; i < HEIGHT; i++) {
+ uint8_t index = i * WIDTH + x;
+ playing[index] = 0;
+ }
+ //save playing state
+ uint8_t index = y * WIDTH + x;
+ playing[index] = state;
+ }
+ }
+ }
+}
+
+void setPixelWithColorsIndex(int i, bool dimmed) {
+
+ uint8_t red = colors[i * 3];
+ uint8_t green = colors[i * 3 + 1];
+ uint8_t blue = colors[i * 3 + 2];
+ if (dimmed) {
+ setPixelWithGamma(i, red / 2, green / 2, blue / 2);
+ }
+ else {
+ setPixelWithGamma(i, red, green, blue);
+ }
+
+}
+
+void setPixelWithGamma(int pixelNumber, uint8_t red, uint8_t green, uint8_t blue) {
+
+ uint32_t color = trellis.Color(
+ pgm_read_byte(&gamma8[red]),
+ pgm_read_byte(&gamma8[green]),
+ pgm_read_byte(&gamma8[blue]));
+
+ trellis.setPixelColor(pixelNumber, color);
+}
+
+const uint8_t PROGMEM gamma8[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2,
+ 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5,
+ 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10,
+ 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16,
+ 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
+ 25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36,
+ 37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 50,
+ 51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68,
+ 69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
+ 90, 92, 93, 95, 96, 98, 99, 101, 102, 104, 105, 107, 109, 110, 112, 114,
+ 115, 117, 119, 120, 122, 124, 126, 127, 129, 131, 133, 135, 137, 138, 140, 142,
+ 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 167, 169, 171, 173, 175,
+ 177, 180, 182, 184, 186, 189, 191, 193, 196, 198, 200, 203, 205, 208, 210, 213,
+ 215, 218, 220, 223, 225, 228, 231, 233, 236, 239, 241, 244, 247, 249, 252, 255
+};
+

Create Neotrellis_M4_Live_Launcher.ino