130 lines
4.2 KiB
C++
130 lines
4.2 KiB
C++
/***************************************************************
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* *
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* Taiko Sanro - Arduino *
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* Support Arduino models with ATmega32u4 microprocessors *
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* *
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* Copyright © 2016 Shiky Chang *
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* zhangxunpx@gmail.com *
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* *
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***************************************************************/
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#define MODE_JIRO 0
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#define CHANNELS 4
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// Input delay (in seconds) = (SAMPLE_CACHE_LENGTH + POWER_CACHE_LENGTH) / sample frequency
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// _CACHE_LENGTH must be less than 256
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#define SAMPLE_CACHE_LENGTH 150
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#define POWER_CACHE_LENGTH 5
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// _THRES must be less than 2^32 = 4294967296 = 4.29e9
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#define LIGHT_THRES 3000000
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#define HEAVY_THRES 10000000
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#include <Keyboard.h>
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int channelSample [CHANNELS];
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int sampleCache [CHANNELS][SAMPLE_CACHE_LENGTH];
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short int sampleCacheIndex [CHANNELS];
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long int power [CHANNELS];
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long int powerCache [CHANNELS][POWER_CACHE_LENGTH];
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short int powerCacheIndex [CHANNELS];
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bool triggered [CHANNELS];
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void setup() {
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Serial.begin (9600);
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Keyboard.begin ();
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for (short int i = 0; i < CHANNELS; i++) {
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for (short int j = 0; j < SAMPLE_CACHE_LENGTH; j++) {
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sampleCache [i][j] = 0;
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}
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sampleCacheIndex [i] = SAMPLE_CACHE_LENGTH - 1;
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for (short int j = 0; j < POWER_CACHE_LENGTH; j++) {
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powerCache [i][j] = 0;
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}
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powerCacheIndex [i] = POWER_CACHE_LENGTH - 1;
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power [i] = 0;
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triggered [i] = false;
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}
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}
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void loop() {
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// Analog input: 0~5V -> 0~1023
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channelSample[0] = analogRead (A0); // L don
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channelSample[1] = analogRead (A1); // R don
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channelSample[2] = analogRead (A2); // L kat
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channelSample[3] = analogRead (A3); // R kat
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// Cache
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// Start status: [ 0 ] [ 1 ] [ 2 ] ... [n-3] [n-2] [n-1]
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// | |
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// Oldest Pointer
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//
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// New status: [NEW] [ 1 ] [ 2 ] ... [n-3] [n-2] [n-1]
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// (Loop 1) | |
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// Pointer |
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// Oldest
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for (short int i = 0; i < CHANNELS; i++) {
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sampleCacheIndex [i] ++;
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sampleCacheIndex [i] %= SAMPLE_CACHE_LENGTH;
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sampleCache [i][sampleCacheIndex [i]] = channelSample [i];
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power [i] += channelSample [i] * channelSample [i];
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int oldest = sampleCache [i][(sampleCacheIndex [i] + 1) % SAMPLE_CACHE_LENGTH];
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power [i] -= oldest * oldest;
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if (power [i] < LIGHT_THRES) {
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power [i] = 0;
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triggered [i] = false;
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}
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powerCacheIndex [i] ++;
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powerCacheIndex [i] %= POWER_CACHE_LENGTH;
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powerCache [i][powerCacheIndex [i]] = power [i];
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// In the power cache, if we see any drop, we regard this point as a maximum
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for (short int j = 0; j < POWER_CACHE_LENGTH; j++){
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if (powerCache [i][(powerCacheIndex [i] + j) % POWER_CACHE_LENGTH] < powerCache [i][(powerCacheIndex [i] + j - 1) % POWER_CACHE_LENGTH]) {
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#if MODE_JIRO
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if (power [i] >= LIGHT_THRES && triggered [i] == false) {
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triggered [i] = true;
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switch (i) {
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case 0: Keyboard.print ('g'); break;
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case 1: Keyboard.print ('h'); break;
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case 2: Keyboard.print ('f'); break;
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case 3: Keyboard.print ('j'); break;
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}
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}
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#else
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if (power [i] >= HEAVY_THRES && triggered [i] == false) {
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triggered [i] = true;
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switch (i) {
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case 0: Keyboard.print ('t'); break;
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case 1: Keyboard.print ('y'); break;
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case 2: Keyboard.print ('r'); break;
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case 3: Keyboard.print ('u'); break;
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}
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} else if (power [i] >= LIGHT_THRES && triggered [i] == false) {
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triggered [i] = true;
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switch (i) {
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case 0: Keyboard.print ('g'); break;
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case 1: Keyboard.print ('h'); break;
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case 2: Keyboard.print ('f'); break;
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case 3: Keyboard.print ('j'); break;
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}
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}
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#endif
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break;
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} else if (j == POWER_CACHE_LENGTH - 1) {
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// The power is still increasing
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}
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}
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// This is the end of each channel
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}
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delay (1);
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}
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