daily_automated

trunk/Arduino/libraries/Timer/Timer.cpp

@@ -0,0 +1,138 @@
+/*
+ *      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, write to the Free Software
+ *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ *      MA 02110-1301, USA.
+ */
+
+/*  * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ Code by Simon Monk
+ http://www.simonmonk.org
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+// For Arduino 1.0 and earlier
+#if defined(ARDUINO) && ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+#include "Timer.h"
+
+Timer::Timer(void)
+{
+}
+
+int8_t Timer::every(unsigned long period, void (*callback)(), int repeatCount)
+{
+	int8_t i = findFreeEventIndex();
+	if (i == -1) return -1;
+
+	_events[i].eventType = EVENT_EVERY;
+	_events[i].period = period;
+	_events[i].repeatCount = repeatCount;
+	_events[i].callback = callback;
+	_events[i].lastEventTime = millis();
+	_events[i].count = 0;
+	return i;
+}
+
+int8_t Timer::every(unsigned long period, void (*callback)())
+{
+	return every(period, callback, -1); // - means forever
+}
+
+int8_t Timer::after(unsigned long period, void (*callback)())
+{
+	return every(period, callback, 1);
+}
+
+int8_t Timer::oscillate(uint8_t pin, unsigned long period, uint8_t startingValue, int repeatCount)
+{
+	int8_t i = findFreeEventIndex();
+	if (i == NO_TIMER_AVAILABLE) return NO_TIMER_AVAILABLE;
+
+	_events[i].eventType = EVENT_OSCILLATE;
+	_events[i].pin = pin;
+	_events[i].period = period;
+	_events[i].pinState = startingValue;
+	digitalWrite(pin, startingValue);
+	_events[i].repeatCount = repeatCount * 2; // full cycles not transitions
+	_events[i].lastEventTime = millis();
+	_events[i].count = 0;
+	return i;
+}
+
+int8_t Timer::oscillate(uint8_t pin, unsigned long period, uint8_t startingValue)
+{
+	return oscillate(pin, period, startingValue, -1); // forever
+}
+
+/**
+ * This method will generate a pulse of !startingValue, occuring period after the
+ * call of this method and lasting for period. The Pin will be left in !startingValue.
+ */
+int8_t Timer::pulse(uint8_t pin, unsigned long period, uint8_t startingValue)
+{
+	return oscillate(pin, period, startingValue, 1); // once
+}
+
+/**
+ * This method will generate a pulse of startingValue, starting immediately and of
+ * length period. The pin will be left in the !startingValue state
+ */
+int8_t Timer::pulseImmediate(uint8_t pin, unsigned long period, uint8_t pulseValue)
+{
+	int8_t id(oscillate(pin, period, pulseValue, 1));
+	// now fix the repeat count
+	if (id >= 0 && id < MAX_NUMBER_OF_EVENTS) {
+		_events[id].repeatCount = 1;
+	}
+	return id;
+}
+
+
+void Timer::stop(int8_t id)
+{
+	if (id >= 0 && id < MAX_NUMBER_OF_EVENTS) {
+		_events[id].eventType = EVENT_NONE;
+	}
+}
+
+void Timer::update(void)
+{
+	unsigned long now = millis();
+	update(now);
+}
+
+void Timer::update(unsigned long now)
+{
+	for (int8_t i = 0; i < MAX_NUMBER_OF_EVENTS; i++)
+	{
+		if (_events[i].eventType != EVENT_NONE)
+		{
+			_events[i].update(now);
+		}
+	}
+}
+int8_t Timer::findFreeEventIndex(void)
+{
+	for (int8_t i = 0; i < MAX_NUMBER_OF_EVENTS; i++)
+	{
+		if (_events[i].eventType == EVENT_NONE)
+		{
+			return i;
+		}
+	}
+	return NO_TIMER_AVAILABLE;
+}