OpenPuck/OpenPuckZephyr/src/status_led.cpp

#include "status_led.h"
#include <Arduino.h>

#define WAKE_LED_OFF ((WAKE_LED_ON) == HIGH ? LOW : HIGH)
#define PULSE_MS 500u // wake flash duration

static unsigned long g_pulseMs = 0;
static bool g_lit = false;

static void ledWrite(int level)
{
	digitalWrite(WAKE_LED_PIN_A, level);
	digitalWrite(WAKE_LED_PIN_B, level);
}

void ledInit()
{
	pinMode(WAKE_LED_PIN_A, OUTPUT);
	pinMode(WAKE_LED_PIN_B, OUTPUT);
	ledWrite(WAKE_LED_OFF);
}

void ledWakePulse()
{
	g_pulseMs = millis();
	g_lit = true;

	// light immediately at the remoteWakeup() call site, not on the next loop
	ledWrite(WAKE_LED_ON);
}

void ledTask()
{
	if (g_lit && millis() - g_pulseMs >= PULSE_MS) {
		g_lit = false;
		ledWrite(WAKE_LED_OFF);
	}
}