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-rw-r--r--quantum/fauxclicky.c68
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diff --git a/quantum/fauxclicky.c b/quantum/fauxclicky.c
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+/*
+Copyright 2017 Priyadi Iman Nurcahyo
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <timer.h>
+#include <fauxclicky.h>
+#include <stdbool.h>
+#include <musical_notes.h>
+
+__attribute__ ((weak))
+float fauxclicky_pressed_note[2] = MUSICAL_NOTE(_F3, 2);
+__attribute__ ((weak))
+float fauxclicky_released_note[2] = MUSICAL_NOTE(_A3, 2);
+__attribute__ ((weak))
+float fauxclicky_beep_note[2] = MUSICAL_NOTE(_C3, 2);
+
+bool fauxclicky_enabled = true;
+uint16_t note_start = 0;
+bool note_playing = false;
+uint16_t note_period = 0;
+
+void fauxclicky_init()
+{
+ // Set port PC6 (OC3A and /OC4A) as output
+ DDRC |= _BV(PORTC6);
+
+ // TCCR3A / TCCR3B: Timer/Counter #3 Control Registers
+ TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
+ TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
+}
+
+void fauxclicky_stop()
+{
+ FAUXCLICKY_DISABLE_OUTPUT;
+ note_playing = false;
+}
+
+void fauxclicky_play(float note[2]) {
+ if (!fauxclicky_enabled) return;
+ if (note_playing) fauxclicky_stop();
+ FAUXCLICKY_TIMER_PERIOD = (uint16_t)(((float)F_CPU) / (note[0] * FAUXCLICKY_CPU_PRESCALER));
+ FAUXCLICKY_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (note[0] * FAUXCLICKY_CPU_PRESCALER)) / 2);
+ note_playing = true;
+ note_period = (note[1] / 16) * (60 / (float)FAUXCLICKY_TEMPO) * 100; // check this
+ note_start = timer_read();
+ FAUXCLICKY_ENABLE_OUTPUT;
+}
+
+void fauxclicky_check() {
+ if (!note_playing) return;
+
+ if (timer_elapsed(note_start) > note_period) {
+ fauxclicky_stop();
+ }
+}