97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
|
|
* LongUnion.h
|
|
*
|
|
* Copyright (C) 2020 Armin Joachimsmeyer
|
|
* Email: armin.joachimsmeyer@gmail.com
|
|
*
|
|
* This file is part of Arduino-Utils https://github.com/ArminJo/Arduino-Utils.
|
|
*
|
|
* Arduino-Utils is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/gpl.html>.
|
|
*
|
|
*/
|
|
|
|
#if !defined(_WORD_UNION_H) || !defined(_LONG_UNION_H)
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifndef _WORD_UNION_H
|
|
#define _WORD_UNION_H
|
|
/**
|
|
* Union to specify parts / manifestations of a 16 bit Word without casts and shifts.
|
|
* It also supports the compiler generating small code.
|
|
*/
|
|
union WordUnion {
|
|
struct {
|
|
uint8_t LowByte;
|
|
uint8_t HighByte;
|
|
} UByte;
|
|
struct {
|
|
int8_t LowByte;
|
|
int8_t HighByte;
|
|
} Byte;
|
|
uint8_t UBytes[2];
|
|
int8_t Bytes[2];
|
|
uint16_t UWord;
|
|
int16_t Word;
|
|
uint8_t *BytePointer;
|
|
};
|
|
#endif // _WORD_UNION_H
|
|
|
|
#ifndef _LONG_UNION_H
|
|
#define _LONG_UNION_H
|
|
/**
|
|
* Union to specify parts / manifestations of a 32 bit Long without casts and shifts.
|
|
* It also supports the compiler generating small code.
|
|
*/
|
|
union LongUnion {
|
|
struct {
|
|
uint8_t LowByte;
|
|
uint8_t MidLowByte;
|
|
uint8_t MidHighByte;
|
|
uint8_t HighByte;
|
|
} UByte;
|
|
struct {
|
|
int8_t LowByte;
|
|
int8_t MidLowByte;
|
|
int8_t MidHighByte;
|
|
int8_t HighByte;
|
|
} Byte;
|
|
struct {
|
|
uint8_t LowByte;
|
|
WordUnion MidWord;
|
|
uint8_t HighByte;
|
|
} ByteWord;
|
|
struct {
|
|
int16_t LowWord;
|
|
int16_t HighWord;
|
|
} Word;
|
|
struct {
|
|
WordUnion LowWord;
|
|
WordUnion HighWord;
|
|
} WordUnion;
|
|
struct {
|
|
uint16_t LowWord;
|
|
uint16_t HighWord;
|
|
} UWord;
|
|
uint8_t UBytes[4]; // seems to have the same code size as using struct UByte
|
|
int8_t Bytes[4];
|
|
uint16_t UWords[2];
|
|
int16_t Words[2];
|
|
uint32_t ULong;
|
|
int32_t Long;
|
|
};
|
|
#endif // _LONG_UNION_H
|
|
|
|
#endif // !defined(_WORD_UNION_H) || !defined(_LONG_UNION_H)
|