61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
|
|
*
|
|
* Based on Sprinter and grbl.
|
|
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
|
|
*
|
|
* This program 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 <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Arduino SdFat Library
|
|
* Copyright (c) 2008 by William Greiman
|
|
*
|
|
* This file is part of the Arduino Sd2Card Library
|
|
*/
|
|
|
|
#include "../inc/MarlinConfig.h"
|
|
|
|
#if ENABLED(SDSUPPORT)
|
|
|
|
#include "SdFatUtil.h"
|
|
#include <string.h>
|
|
|
|
/**
|
|
* Amount of free RAM
|
|
* \return The number of free bytes.
|
|
*/
|
|
#ifdef __arm__
|
|
|
|
extern "C" char* sbrk(int incr);
|
|
int SdFatUtil::FreeRam() {
|
|
char top;
|
|
return &top - reinterpret_cast<char*>(sbrk(0));
|
|
}
|
|
|
|
#else
|
|
|
|
extern char* __brkval;
|
|
extern char __bss_end;
|
|
int SdFatUtil::FreeRam() {
|
|
char top;
|
|
return __brkval ? &top - __brkval : &top - &__bss_end;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif // SDSUPPORT
|