66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#include "SAMDTimerInterrupt.h"
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#include "SAMD_ISR_Timer.h"
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SAMDTimer TaskTimer(TIMER_TC3);
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SAMDTimer BuzzerTimer(TIMER_TC5);
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SAMD_ISR_Timer TasksISRs;
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void TasksHandler(void) { TasksISRs.run(); }
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const int COUNTDOWN = 240;
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const int PERIOD_MS = 1000;
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const int BUZZER_FREQ = 300;
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const uint BUTTON_PIN = 6;
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const uint BUTTON_LED_PIN = 5;
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const uint BUZZER_PIN = 0;
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/* Metronome state is expressed by countdown:
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* -1 - IDLE
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* 0 - BEATING
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* >0 - COUNTDOWN
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*/
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volatile int countdown = -1;
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volatile float temperature = 0.0;
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void setup() {
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initButton();
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initTemperature();
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initTube();
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pinMode(BUZZER_PIN, OUTPUT);
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BuzzerTimer.attachInterrupt(BUZZER_FREQ *2, buzz);
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BuzzerTimer.disableTimer();
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TaskTimer.attachInterruptInterval_MS(25, TasksHandler);
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TasksISRs.setInterval(PERIOD_MS, runMetronome);
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TasksISRs.setInterval(PERIOD_MS, readTemperature);
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TasksISRs.setInterval(PERIOD_MS, updateTube);
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}
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volatile bool buzzing = false;
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void buzz() {
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digitalWrite(BUZZER_PIN, buzzing ? LOW : HIGH);
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buzzing = !buzzing;
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}
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void stopBuzzer() {
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BuzzerTimer.disableTimer();
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digitalWrite(BUZZER_PIN, LOW);
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}
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void runMetronome() {
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if (countdown > 0) {
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countdown -= 1;
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digitalWrite(BUTTON_LED_PIN, countdown % 2 ? HIGH : LOW);
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} else if (countdown == 0) {
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TasksISRs.setTimeout(100, stopBuzzer);
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BuzzerTimer.enableTimer();
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}
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}
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void loop() {
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}
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