08 Clouds

08Clouds/08Clouds.ino

@@ -0,0 +1,65 @@
+// Basic demo for configuring the MCP4728 4-Channel 12-bit I2C DAC
+#include <Adafruit_MCP4728.h>
+#include <Wire.h>
+
+Adafruit_MCP4728 mcp;
+
+
+// idea behind this - sequence a cloud of gate events
+
+// 1 3 5 7 hexany log2
+int bpm = 135;
+float beat_s = 60.0 / (float)bpm;
+int beat_m = round(1000.0 * beat_s); 
+float mod_b = 3.141592653589793 / 4.0;
+
+
+int gate = 0;
+int gatel = 1000;
+int tick = 16;
+long init_t;
+float p_gate = 0.0;
+
+void setup(void) {
+  Serial.begin(115200);
+  while (!Serial)
+    delay(10); // will pause Zero, Leonardo, etc until serial console opens
+
+  if (!mcp.begin(0x64)) {
+    Serial.println("Failed to find MCP4728 chip");
+    while (1) {
+      delay(10);
+    }
+    Serial.println("MCP4728 initialised");
+  }
+
+  init_t = millis();
+
+  mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+}
+
+
+
+void loop() {
+  if( gate > 0 ) {
+    gate--;
+    if( gate == 0 ) {
+      mcp.setChannelValue(MCP4728_CHANNEL_B, 0);
+    } 
+  } else {
+    long now = millis();
+    long mod_t = now - init_t;
+    tick--;
+    if( tick == 0 ) {
+      tick = 16;
+      p_gate = sin(mod_b * (float)mod_t / (float)beat_m);
+    }
+    if( (float)random(10000) / 100.0 < abs(p_gate)) {
+      mcp.setChannelValue(MCP4728_CHANNEL_B, 4095);
+      gate = gatel;
+    }
+  }
+
+}
+
+