+ initial version

libraries/PulsePattern/PulsePatternOut.cpp

@@ -0,0 +1,100 @@
+//
+//    FILE: PulsePatternOut.cpp
+//  AUTHOR: Rob dot Tillaart at gmail dot com  
+// VERSION: see PULSEPATTERNOUT_LIB_VERSION in .h
+// PURPOSE: PulsePatternOut library for Arduino
+//
+// HISTORY:
+// 0.0.1 - 2012-11-23 initial version
+//
+// Released to the public domain
+//
+
+#include "PulsePatternOut.h"
+// TODO PRE 1.0 backwards compat
+#include "Arduino.h"
+
+enum { NO_CLOCK, PRESCALE_1, PRESCALE_8, PRESCALE_64, PRESCALE_256, PRESCALE_1024 };
+
+PulsePatternOut::PulsePatternOut(uint8_t pin)
+{
+	_pin = pin;
+	pinMode(_pin, OUTPUT);
+	digitalWrite(_pin, LOW);
+	_size = 0;
+	_cnt = 0;
+	_state = STOPPED;
+}
+
+PulsePatternOut::~PulsePatternOut()
+{
+}
+
+void PulsePatternOut::init(uint16_t * ar, uint8_t size, uint8_t level = LOW)
+{ 
+	_ar = ar;
+	_size = size;
+	_level = level;
+	_cnt = 0;
+	_state = STOPPED;
+}
+
+void PulsePatternOut::start()
+{
+	if (_size == 0) return;
+	if (_state == RUNNING) return;
+	setTimer(1);  // start asap
+	_state = RUNNING;
+}
+
+void PulsePatternOut::stop()
+{
+	stopTimer();
+	_state = STOPPED;
+}
+
+bool PulsePatternOut::isRunning()
+{
+	return (_state == RUNNING);
+}
+
+void PulsePatternOut::worker()
+{
+	if (_cnt == _size || _state == STOPPED) 
+	{
+		_state = STOPPED;
+		_cnt = 0;
+		stopTimer();
+		return;
+	}
+
+	_level = !_level;
+	// improve - absorb digitalwrite details here
+	digitalWrite(_pin, _level);
+
+	setTimer(_ar[_cnt]);
+	_cnt++;
+}
+
+// TIMER code based upon - http://www.gammon.com.au/forum/?id=11504
+
+void PulsePatternOut::stopTimer()
+{
+	TCCR1A = 0;        // reset timer 1
+	TCCR1B = 0;
+}
+
+void PulsePatternOut::setTimer(uint16_t cc)
+{
+	TCCR1A = 0;			// reset timer 1
+	TCCR1B = 0;
+	TCNT1 = 0;      	// reset counter
+    OCR1A = cc*2;		// compare A register value; 
+	// 4: CTC mode, top = OCR1A
+	TCCR1A = _BV (COM1A1);  	// clear on compare
+	TCCR1B = _BV (WGM12) | PRESCALE_1024;  // should be PRESCALE_8
+	TIFR1 |= _BV (OCF1A);    // clear interrupt flag
+	TIMSK1 = _BV (OCIE1A);   // interrupt on Compare A Match   
+}
+
+// END OF FILE

libraries/PulsePattern/PulsePatternOut.h

@@ -0,0 +1,46 @@
+#ifndef Histogram_h
+#define PulsePatternOut_h
+// 
+//    FILE: PulsePatternOut.h
+//  AUTHOR: Rob dot Tillaart at gmail dot com  
+// PURPOSE: PulsePatternOut library for Arduino
+//          sends out a pulse pattern over a digital pin
+// HISTORY: See PulsePatternOut.cpp
+//
+// Released to the public domain
+//
+
+#include <inttypes.h>
+
+#define PULSEPATTERNOUT_LIB_VERSION "0.0.1"
+
+#define STOPPED 0
+#define RUNNING 1
+
+
+class PulsePatternOut 
+{
+	public:
+	PulsePatternOut(uint8_t pin);
+	~PulsePatternOut();
+	void init(uint16_t * ar, uint8_t size, uint8_t level);
+	void start();
+	void stop();
+	bool isRunning();
+	void worker();
+	
+protected:
+
+	void stopTimer();
+	void setTimer(uint16_t cc);
+	
+	uint16_t * _ar;
+	uint8_t _size;
+	uint8_t _pin;
+	volatile uint8_t _level;
+	volatile uint8_t _state;
+	volatile uint8_t _cnt;
+};
+
+#endif
+// END OF FILE