Yoji KURODA / Encoder

Encoder (single state) class library

encoder.h@0:b89384fab7bf, 2019-10-24 (annotated)

Committer:
ykuroda
Date:
Thu Oct 24 02:56:58 2019 +0000
Revision:
0:b89384fab7bf
Encoder (single state) class library

Who changed what in which revision?

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ykuroda 0:b89384fab7bf 1 //
ykuroda 0:b89384fab7bf 2 // Encoder Class
ykuroda 0:b89384fab7bf 3 //
ykuroda 0:b89384fab7bf 4 // 2019.10.13 ... Originally written by Y.Kuroda
ykuroda 0:b89384fab7bf 5 //
ykuroda 0:b89384fab7bf 6 #ifndef _COUNTER_H
ykuroda 0:b89384fab7bf 7 #define _COUNTER_H
ykuroda 0:b89384fab7bf 8
ykuroda 0:b89384fab7bf 9 class Encoder {
ykuroda 0:b89384fab7bf 10 public:
ykuroda 0:b89384fab7bf 11 Encoder(PinName pin) : _interrupt(pin), _count(0) { // create the InterruptIn on the pin specified to Counter
ykuroda 0:b89384fab7bf 12 _interrupt.rise(callback(this, &Encoder::increment)); // attach increment function of this counter instance
ykuroda 0:b89384fab7bf 13 _interrupt.fall(callback(this, &Encoder::increment)); // attach increment function of this counter instance
ykuroda 0:b89384fab7bf 14 }
ykuroda 0:b89384fab7bf 15
ykuroda 0:b89384fab7bf 16 void increment() { _count++; }
ykuroda 0:b89384fab7bf 17 int read() const { return _count; }
ykuroda 0:b89384fab7bf 18 int set(int c) { return _count=c; }
ykuroda 0:b89384fab7bf 19 int reset(){ return set(0); }
ykuroda 0:b89384fab7bf 20
ykuroda 0:b89384fab7bf 21 int operator=(int c) { return set(c); }
ykuroda 0:b89384fab7bf 22 // Encoder& operator=(Encoder& c){ return *this; }
ykuroda 0:b89384fab7bf 23 // int operator=(Encoder& c){ return read(); }
ykuroda 0:b89384fab7bf 24
ykuroda 0:b89384fab7bf 25 operator int() const { return read(); }
ykuroda 0:b89384fab7bf 26
ykuroda 0:b89384fab7bf 27 protected:
ykuroda 0:b89384fab7bf 28 InterruptIn _interrupt;
ykuroda 0:b89384fab7bf 29 volatile int _count;
ykuroda 0:b89384fab7bf 30 };
ykuroda 0:b89384fab7bf 31
ykuroda 0:b89384fab7bf 32 #endif
ykuroda 0:b89384fab7bf 33