Looptober24/10MultiMod/10MultiMod.ino

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2024-10-12 00:35:16 +00:00
// Basic demo for configuring the MCP4728 4-Channel 12-bit I2C DAC
#include <Adafruit_MCP4728.h>
#include <Wire.h>
Adafruit_MCP4728 mcp;
int bpm = 98;
float beat_s = 60.0 / (float)bpm;
int beat_m = round(1000.0 * beat_s);
long init_t;
float pi = 3.141592653589793;
float mod_a = pi;
float mod_b = pi / 4.0;
float mod_c = pi / 3.0;
float mod_d = pi / 5.0;
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() {
long now = millis();
long mod_t = (now - init_t);
float tf = (float)mod_t / (float)beat_m;
uint16_t a = round(4095.0 * (0.5 + 0.5 * sin(mod_a * tf)));
uint16_t b = round(4095.0 * (0.5 + 0.5 * sin(mod_b * tf)));
uint16_t c = round(4095.0 * (0.5 + 0.5 * sin(mod_c * tf)));
uint16_t d = round(4095.0 * (0.5 + 0.5 * sin(mod_d * tf)));
mcp.fastWrite(a, b, c, d);
}