flasher.cpp

#include "flasher.h"

#include "led.h"
#include "constants.h"

namespace flasher {
  namespace {
    const unsigned int FLASHER_INTERVAL = 1000;

    bool flashing[constants::NUMBER_OF_LEDS];

    bool currentFlashingState = LOW;
    
    unsigned long nextRun = millis();

    void flash() {
      currentFlashingState = !currentFlashingState;

      for (uint8_t led = 0 ; led < constants::NUMBER_OF_LEDS ; led++) {
        if (flashing[led]) {
          if (currentFlashingState) {
            led::turnOn(led);
          } else {
            led::turnOff(led);
          }
        }
      }
      led::shiftOut();
      nextRun = millis() + FLASHER_INTERVAL;
    }
  }

  void startFlashing(uint8_t ledNumber) {
    flashing[ledNumber] = true;
  }

  void stopFlashing(uint8_t ledNumber) {
    flashing[ledNumber] = false;
    led::turnOff(ledNumber);
    led::shiftOut();
  }

  void checkFlash() {
    if (millis() > nextRun) {
      flash();
    }
  }
}