PB / RotaryEncoder

Rotary encoder handler.

RotaryEncoder.h@0:db7f371c8530, 2016-07-20 (annotated)

Committer:
Sateg
Date:
Wed Jul 20 00:30:23 2016 +0000
Revision:
0:db7f371c8530
Working, conservative rotary encoder handler.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sateg 0:db7f371c8530 1 #include "mbed.h"
Sateg 0:db7f371c8530 2
Sateg 0:db7f371c8530 3 #ifndef ROTARY_ENCODER_H_
Sateg 0:db7f371c8530 4 #define ROTARY_ENCODER_H_
Sateg 0:db7f371c8530 5
Sateg 0:db7f371c8530 6 /**
Sateg 0:db7f371c8530 7 Rotary encoder handling class.
Sateg 0:db7f371c8530 8 Starts a ticker which checks the status of the encoder and
Sateg 0:db7f371c8530 9 sets the rotation directions based on its status.
Sateg 0:db7f371c8530 10 */
Sateg 0:db7f371c8530 11 class RotaryEncoder {
Sateg 0:db7f371c8530 12 public:
Sateg 0:db7f371c8530 13 RotaryEncoder(void (*cb)(void), PinName channelA_, PinName channelB_, PinName pushPin_, float period = 0.01);
Sateg 0:db7f371c8530 14 virtual ~RotaryEncoder();
Sateg 0:db7f371c8530 15
Sateg 0:db7f371c8530 16 /// Retrieve rotation direction.
Sateg 0:db7f371c8530 17 int8_t getDirection() const;
Sateg 0:db7f371c8530 18 /// Retrieve push button status.
Sateg 0:db7f371c8530 19 bool getPushButton() const;
Sateg 0:db7f371c8530 20 /// Launched by Ticker to determine rotation direction
Sateg 0:db7f371c8530 21 void pulse();
Sateg 0:db7f371c8530 22
Sateg 0:db7f371c8530 23 int getCounter() const;
Sateg 0:db7f371c8530 24
Sateg 0:db7f371c8530 25 private:
Sateg 0:db7f371c8530 26
Sateg 0:db7f371c8530 27 /// Table which helps determine the rotation direction
Sateg 0:db7f371c8530 28 static const int8_t encoderTable[];
Sateg 0:db7f371c8530 29
Sateg 0:db7f371c8530 30 int counter;
Sateg 0:db7f371c8530 31 int8_t direction;
Sateg 0:db7f371c8530 32 int8_t lastDirection;
Sateg 0:db7f371c8530 33 InterruptIn channelA;
Sateg 0:db7f371c8530 34 InterruptIn channelB;
Sateg 0:db7f371c8530 35 InterruptIn pushPin;
Sateg 0:db7f371c8530 36 Ticker encoderTicker;
Sateg 0:db7f371c8530 37
Sateg 0:db7f371c8530 38 };
Sateg 0:db7f371c8530 39
Sateg 0:db7f371c8530 40 #endif /* ROTARY_ENCODER_H_ */