mirror of
https://github.com/ShikyC/Taiko-Drum-Controller-Arduino.git
synced 2024-11-12 00:50:46 +01:00
125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
#define CHANNELS 4
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// SAMPLE_CACHE_LENGTH must be power of 2 (8, 16, 32, etc.)
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// See cache.h for implementation
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#define SAMPLE_CACHE_LENGTH 32
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// The thresholds are also dependent on SAMPLE_CACHE_LENGTH, if you
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// changed SAMPLE_CACHE_LENGTH, you should also adjust thresholds
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#define HIT_THRES 1750
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#define RESET_THRES 200
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// Sampling period in μs, e.g., 500μs = 0.5ms = 2000Hz
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#define SAMPLING_PERIOD 500
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// Sensitivity multipliers for each channel, 1.0 as the baseline
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#define L_DON_SENS 1.0
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#define L_KAT_SENS 1.0
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#define R_DON_SENS 1.0
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#define R_KAT_SENS 1.0
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// Input pins for each channel
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#define L_DON_IN 4
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#define L_KAT_IN 5
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#define R_DON_IN 6
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#define R_KAT_IN 7
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// Output LED pins for each channel (just for visualization)
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#define L_DON_LED 10
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#define L_KAT_LED 11
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#define R_DON_LED 12
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#define R_KAT_LED 13
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// Keyboard output for each channel
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#define L_DON_KEY 'f'
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#define L_KAT_KEY 'd'
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#define R_DON_KEY 'j'
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#define R_KAT_KEY 'k'
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// Enable debug mode to view analog input values from the Serial
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// Enabling this also disables the keyboard simulation
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#define DEBUG 0
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#include "USB.h"
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#include "USBHIDKeyboard.h"
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#include "cache.h"
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USBHIDKeyboard Keyboard;
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Cache<int, SAMPLE_CACHE_LENGTH> inputWindow[CHANNELS];
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unsigned long power[CHANNELS];
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unsigned long lastPower[CHANNELS];
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bool triggered;
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unsigned long triggeredTime[CHANNELS];
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const byte inPins[] = {L_DON_IN, L_KAT_IN, R_DON_IN, R_KAT_IN};
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const byte outPins[] = {L_DON_LED, L_KAT_LED, R_DON_LED, R_KAT_LED};
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const char outKeys[] = {L_DON_KEY, L_KAT_KEY, R_DON_KEY, R_KAT_KEY};
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float sensitivities[] = {L_DON_SENS, L_KAT_SENS, R_DON_SENS, R_KAT_SENS};
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short maxIndex;
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float maxPower;
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unsigned long lastTime;
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void setup() {
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Serial.begin(250000);
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for (byte i = 0; i < CHANNELS; i++) {
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power[i] = 0;
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lastPower[i] = 0;
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triggered = false;
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pinMode(inPins[i], INPUT);
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pinMode(outPins[i], OUTPUT);
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}
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maxIndex = -1;
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maxPower = 0;
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lastTime = micros();
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#if !DEBUG
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Keyboard.begin();
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USB.begin();
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#endif
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}
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void loop() {
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if (maxIndex != -1 && lastPower[maxIndex] < RESET_THRES) {
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triggered = false;
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digitalWrite(outPins[maxIndex], LOW);
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maxIndex = -1;
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maxPower = 0;
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}
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for (byte i = 0; i < CHANNELS; i++) {
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inputWindow[i].put(analogRead(inPins[i]));
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power[i] = sensitivities[i] *
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(power[i] - inputWindow[i].get(1) + inputWindow[i].get());
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if (lastPower[i] > maxPower && power[i] < lastPower[i]) {
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maxPower = lastPower[i];
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maxIndex = i;
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}
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lastPower[i] = power[i];
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#if DEBUG
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Serial.print(power[i]);
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Serial.print(" ");
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#endif
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}
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if (!triggered && maxPower >= HIT_THRES) {
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triggered = true;
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digitalWrite(outPins[maxIndex], HIGH);
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#if !DEBUG
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Keyboard.write(outKeys[maxIndex]);
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#endif
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}
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#if DEBUG
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Serial.print("\n");
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#endif
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unsigned int frameTime = micros() - lastTime;
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if (frameTime < SAMPLING_PERIOD) {
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delayMicroseconds(SAMPLING_PERIOD - frameTime);
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}
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lastTime = micros();
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}
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