Initial commit

arduino_cava.ino

@@ -0,0 +1,31 @@
+#include "LedControl.h"
+
+LedControl leds = LedControl(2, 4, 3, 2);
+
+void setup() {
+  for (int i = 0; i < leds.getDeviceCount(); i++) {
+    leds.shutdown(i, false);
+    leds.clearDisplay(i);
+  }
+
+  Serial.begin(1000000);
+}
+
+void loop() {
+  if (Serial.available()) {
+    String line = Serial.readStringUntil('\n');
+    for (int i = 0; i < line.length(); i += 2) {
+      int x = i / 2;
+      int y = (int) line.charAt(i) - '0';
+      byte val = 0;
+      for (int j = 0; j <= y; j++) {
+        val ^= (1 << j);
+      }
+      if (x > 7) {
+        leds.setRow(1, x-8, val);
+      } else {
+        leds.setRow(0, x, val);
+      }
+    }
+  }
+}

cava_run.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+SERIAL=/dev/ttyACM0
+
+sudo stty -F $SERIAL cs8 -cstopb -parenb 1000000
+(cava cava -p ./config | sudo tee $SERIAL) >/dev/null

config

@@ -0,0 +1,13 @@
+[general]
+bars = 16
+autosens = 1
+
+[output]
+method = raw
+data_format = ascii
+ascii_max_range = 7
+bit_format = 8bit
+
+[smoothing]
+monstercat = 1
+