rotary_encoder.hpp

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#ifndef ROTARY_ENCODER_HPP
#define ROTARY_ENCODER_HPP
 
#include <stdint.h>
 
typedef void (*re_decoderCB_t)(int);
 
class re_decoder
{
   int mygpioA, mygpioB, levA, levB, lastGpio;
 
   re_decoderCB_t mycallback;
 
   void _pulse(int gpio, int level, uint32_t tick);
 
   /* Need a static callback to link with C. */
   static void _pulseEx(int gpio, int level, uint32_t tick, void *user);
 
 
   public:
 
   re_decoder(int gpioA, int gpioB, re_decoderCB_t callback);
   /*
      This function establishes a rotary encoder on gpioA and gpioB.
 
      When the encoder is turned the callback function is called.
   */
 
   void re_cancel(void);
   /*
      This function releases the resources used by the decoder.
   */
};
 
#endif