rotenc.h

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/*
 * rotenc.h
 *
 * Part of librfn (a general utility library from redfelineninja.org.uk)
 *
 * Copyright (C) 2016 Daniel Thompson <daniel@redfelineninja.org.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 */

#ifndef RF_ROTENC_H_
#define RF_ROTENC_H_

#include <stdint.h>

typedef struct rotenc {
        uint8_t last_state;
        uint8_t count;
        uint16_t internal_count;
} rotenc_t;

#define ROTENC_VAR_INIT { 0 }

void rotenc_decode(rotenc_t *r, uint8_t state);


uint16_t rotenc_count14(rotenc_t *r);

static inline uint8_t rotenc_count(rotenc_t *r)
{
        return r->count;
}

#endif // RF_ROTENC_H_