Looptober24/08Clouds/08Clouds.ino

66 lines
1.2 KiB
C++

// 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;
}
}
}