63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program 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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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* sd/SdFatUtil.cpp
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*
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* Arduino SdFat Library
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* Copyright (c) 2008 by William Greiman
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*
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* This file is part of the Arduino Sd2Card Library
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*/
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#include "../inc/MarlinConfig.h"
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#if ENABLED(SDSUPPORT)
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#include "SdFatUtil.h"
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#include <string.h>
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/**
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* Amount of free RAM
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* \return The number of free bytes.
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*/
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#ifdef __arm__
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extern "C" char* sbrk(int incr);
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int SdFatUtil::FreeRam() {
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char top;
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return &top - reinterpret_cast<char*>(sbrk(0));
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}
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#else
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extern char* __brkval;
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extern char __bss_end;
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int SdFatUtil::FreeRam() {
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char top;
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return __brkval ? &top - __brkval : &top - &__bss_end;
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}
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#endif
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#endif // SDSUPPORT
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