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CommandStation-EX/FSH.h
2022-01-07 02:28:35 +01:00

57 lines
1.7 KiB
C

/*
* © 2021 Neil McKechnie
* © 2021 Harald Barth
* © 2021 Fred Decker
* All rights reserved.
*
* This file is part of CommandStation-EX
*
* This 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.
*
* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef FSH_h
#define FSH_h
/* This is an architecture support file to manage the differences
* between the nano/uno.mega and the later nanoEvery, unoWifiRev2 etc
*
* IMPORTANT:
* To maintain portability the main code should NOT contain ANY references
* to the following:
*
* __FlashStringHelper Use FSH instead.
* PROGMEM use FLASH instead
* pgm_read_byte_near use GETFLASH instead.
* pgm_read_word_near use GETFLASHW instead.
*
*/
#include <Arduino.h>
#if defined(ARDUINO_ARCH_MEGAAVR)
#ifdef F
#undef F
#endif
#define F(str) (str)
typedef char FSH;
#define GETFLASH(addr) (*(const unsigned char *)(addr))
#define GETFLASHW(addr) (*(const unsigned short *)(addr))
#define FLASH
#define strlen_P strlen
#define strcpy_P strcpy
#else
typedef __FlashStringHelper FSH;
#define GETFLASH(addr) pgm_read_byte_near(addr)
#define GETFLASHW(addr) pgm_read_word_near(addr)
#define FLASH PROGMEM
#endif
#endif