/* 
 * mjo-pin.h
 *
 * Experimental macros for I/O port manipulation
 *
 * usage:
 *   SINGLE_PIN(foo, C, 3);
 *
 *   foo_set_low();
 *   foo_init_read();
 *   ...
 * 
 * Copyright 2014, Martin Oldfield
 *
 * See http://mjoldfield.com/atelier/2014/05/pin-macros.html
 *  
 * Permission to use, copy, modify, and/or distribute this software for  
 * any purpose with or without fee is hereby granted, provided that the  
 * above copyright notice and this permission notice appear in all copies.  
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL  
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED  
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR  
 * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES  
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,  
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS  
 * SOFTWARE.  
 */

#ifndef _MJOPIN_H_
#define _MJOPIN_H_

#define SINGLE_PIN(NAME,BANK,BIT)					\
static inline void NAME ## _set_low  (void) __attribute__((always_inline));                  \
static inline void NAME ## _set_low  (void) { PORT ## BANK &= ~(_BV(PORT ## BANK ## BIT)); } \
static inline void NAME ## _set_high (void) __attribute__((always_inline));                  \
static inline void NAME ## _set_high (void) { PORT ## BANK |=  (_BV(PORT ## BANK ## BIT)); } \
static inline void NAME ## _set(uint8_t)   __attribute__((always_inline));                   \
static inline void NAME ## _set(uint8_t x) { if (x) { NAME ## _set_high(); } else { NAME ## _set_low(); } } \
static inline void NAME ## _init_liwrite (void) __attribute__((always_inline));                   \
static inline void NAME ## _init_write (void) { DDR ## BANK  |=  (_BV(PORT ## BANK ## BIT)); }  \
static inline uint8_t NAME ## _get (void) __attribute__((always_inline));                       \
static inline uint8_t NAME ## _get (void) { return PIN ## BANK & (_BV(PORT ## BANK ## BIT)); }  \
static inline void NAME ## _init_read  (void) __attribute__((always_inline));                   \
static inline void NAME ## _init_read  (void) { DDR ## BANK  &= ~(_BV(PORT ## BANK ## BIT)); } 

#endif