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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#include "grove_alphanumeric_display.h"
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#define HW_TIMER_INTERVAL_MS 10
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SAMDTimer ITimer(TIMER_TC3);
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SAMD_ISR_Timer ISR_Timer;
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void TimerHandler(void) { ISR_Timer.run(); }
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Seeed_Digital_Tube tube;
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const int COUNTDOWN = 240;
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const int PERIOD_MS = 1000;
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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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// Wire initialized by temperature sensor
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tube.setTubeType(TYPE_4, TYPE_4_DEFAULT_I2C_ADDR);
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tube.setBrightness(15);
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tube.setBlinkRate(BLINK_OFF);
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tube.setPoint(true,true);
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ITimer.attachInterruptInterval_MS(10, TimerHandler);
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ISR_Timer.setInterval(PERIOD_MS, runMetronome);
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ISR_Timer.setInterval(PERIOD_MS, readTemperature);
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ISR_Timer.setInterval(PERIOD_MS, updateTube);
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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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//tone(BUZZER_PIN, 1000, 100);
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}
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}
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void updateTube() {
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char tube_str[5];
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if (countdown <= 0)
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sprintf(tube_str, "%4u", (unsigned int) (temperature * 100.0));
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else
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sprintf(tube_str, "%4u", countdown);
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tube.displayString(tube_str);
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}
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void loop() {}
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