99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/**
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@file
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Utility Functions for Manipulating Words
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@defgroup util_word "util/word.h": Utility Functions for Manipulating Words
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@code#include "util/word.h"@endcode
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This header file provides utility functions for manipulating words.
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*/
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/*
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word.h - Utility Functions for Manipulating Words
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This file is part of ModbusMaster.
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ModbusMaster is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ModbusMaster is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ModbusMaster. If not, see <http://www.gnu.org/licenses/>.
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Written by Doc Walker (Rx)
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Copyright © 2009-2015 Doc Walker <4-20ma at wvfans dot net>
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*/
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#ifndef _UTIL_WORD_H_
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#define _UTIL_WORD_H_
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/** @ingroup util_word
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Return low word of a 32-bit integer.
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@param uint32_t ww (0x00000000..0xFFFFFFFF)
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@return low word of input (0x0000..0xFFFF)
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*/
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static inline uint16_t lowWord(uint32_t ww)
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{
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return (uint16_t) ((ww) & 0xFFFF);
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}
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/** @ingroup util_word
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Return high word of a 32-bit integer.
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@param uint32_t ww (0x00000000..0xFFFFFFFF)
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@return high word of input (0x0000..0xFFFF)
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*/
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static inline uint16_t highWord(uint32_t ww)
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{
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return (uint16_t) ((ww) >> 16);
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}
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/* utility functions for porting ModbusMaster to LPCXpresso
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* added by krl
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*/
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static inline uint16_t word(uint8_t ww)
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{
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return (uint16_t) (ww);
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}
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static inline uint16_t word(uint8_t h, uint8_t l)
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{
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return (uint16_t) ((h << 8) | l);
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}
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static inline uint8_t highByte(uint16_t v)
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{
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return (uint8_t) ((v >> 8) & 0xFF);
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}
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static inline uint16_t lowByte(uint16_t v)
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{
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return (uint8_t) (v & 0xFF);
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}
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static inline uint8_t bitRead(uint8_t v, uint8_t n)
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{
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return (uint8_t) (v & (1 << n) ? 1 : 0);
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}
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static inline void bitWrite(uint16_t& v, uint8_t n, uint8_t b)
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{
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if(b) v = v | (1 << n);
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else v = v & ~(1 << n);
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}
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#endif /* _UTIL_WORD_H_ */
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