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utility.h
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utility.h
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/*****************************************************************************
*
* AVR Alarm Clock
*
* This file is part of the AVR Alarm Clock project. The project is
* distributed at:
* https://github.com/maximecb/AVR-Alarm-Clock
*
* Copyright (c) 2012, Maxime Chevalier-Boisvert. All rights reserved.
*
* This software is licensed under the following license (Modified BSD
* License):
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#ifndef _UTILITY_H_
#define _UTILITY_H_
// Output pin handling macro
#define MAKE_OUTPUT(IO_NAME, P_LTR, PIN_NO, NUM_BITS) \
inline void IO_NAME(uint8_t val) \
{ \
uint8_t NMASK = (uint8_t)( \
~((0xFF >> (8-NUM_BITS)) << PIN_NO) \
); \
\
PORT##P_LTR = (PORT##P_LTR & NMASK) | (val << PIN_NO); \
} \
inline void INIT_##IO_NAME() \
{ \
uint8_t MASK = (uint8_t)( \
((0xFF >> (8-NUM_BITS)) << PIN_NO) \
); \
\
DDR##P_LTR = DDR##P_LTR | MASK; \
IO_NAME(0); \
}
// Input pin handling macro
#define MAKE_INPUT(IO_NAME, P_LTR, PIN_NO, NUM_BITS) \
inline uint8_t IO_NAME() \
{ \
uint8_t MASK = (uint8_t)( \
((0xFF >> (8-NUM_BITS)) << PIN_NO) \
); \
\
uint8_t val = (PIN##P_LTR & MASK) >> PIN_NO; \
return val; \
} \
inline void INIT_##IO_NAME() \
{ \
uint8_t NMASK = (uint8_t)( \
~((0xFF >> (8-NUM_BITS)) << PIN_NO) \
); \
\
DDR##P_LTR = DDR##P_LTR & NMASK; \
} \
inline void PULLUP_##IO_NAME() \
{ \
uint8_t NMASK = (uint8_t)( \
~((0xFF >> (8-NUM_BITS)) << PIN_NO) \
); \
\
PORT##P_LTR = PORT##P_LTR & NMASK; \
}
#endif // #ifndef _UTILITY_H_