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Author: avandalen

FastPWMdac.cpp

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+/* 
+FastPWMdac
+For the output pins that can be used see: http://www.pjrc.com/teensy/td_libs_TimerOne.html
+The library <TimerOne.h> has to be installed too
+https://github.com/PaulStoffregen/TimerOne
+
+Version 19-12-2015
+*/
+
+#include <TimerOne.h> // this library has to be installed
+#include "FastPWMdac.h"
+
+void FastPWMdac::init(byte _timer1PWMpin, byte resolution)
+{ timer1PWMpin = _timer1PWMpin;
+  if(resolution == 8) Timer1.initialize(32); 
+  if(resolution == 10) Timer1.initialize(128); 
+  Timer1.pwm(timer1PWMpin, 0); // dummy, required before setPwmDuty()
+}
+
+void FastPWMdac::analogWrite8bit(byte value8bit)
+{ Timer1.setPwmDuty(timer1PWMpin, value8bit*4); // faster than pwm() 
+}
+
+void FastPWMdac::analogWrite10bit(int value10bit)
+{ Timer1.setPwmDuty(timer1PWMpin, value10bit); // faster than pwm() 
+}
+
+

FastPWMdac.h

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+#ifndef FastPWMdac_H
+#define FastPWMdac_H
+
+class FastPWMdac
+{ 
+public:
+  void init(byte _timer1PWMpin, byte resolution);
+  void analogWrite8bit(byte value8bit);
+  void analogWrite10bit(int value10bit);
+
+private:
+  byte timer1PWMpin; 
+};
+
+#endif