78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/* Arduino SdFat Library
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* Copyright (C) 2012 by William Greiman
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*
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* This file is part of the Arduino SdFat Library
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*
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* This Library 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 Library 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 the Arduino SdFat Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <SdFat.h>
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#include <SdFatUtil.h>
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#ifdef __arm__
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// should use uinstd.h to define sbrk but Due causes a conflict
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extern "C" char* sbrk(int incr);
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#endif // __arm__
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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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int SdFatUtil::FreeRam() {
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char top;
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#ifdef __arm__
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return &top - reinterpret_cast<char*>(sbrk(0));
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#elif defined(CORE_TEENSY) || (ARDUINO > 103 && ARDUINO != 151)
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extern char *__brkval;
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return &top - __brkval;
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#else // __arm__
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extern char *__brkval;
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extern char *__malloc_heap_start;
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return __brkval ? &top - __brkval : &top - __malloc_heap_start;
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#endif // __arm__
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}
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//------------------------------------------------------------------------------
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/** %Print a string in flash memory.
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*
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* \param[in] pr Print object for output.
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* \param[in] str Pointer to string stored in flash memory.
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*/
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void SdFatUtil::print_P(Print* pr, PGM_P str) {
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for (uint8_t c; (c = pgm_read_byte(str)); str++) pr->write(c);
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}
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//------------------------------------------------------------------------------
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/** %Print a string in flash memory followed by a CR/LF.
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*
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* \param[in] pr Print object for output.
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* \param[in] str Pointer to string stored in flash memory.
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*/
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void SdFatUtil::println_P(Print* pr, PGM_P str) {
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print_P(pr, str);
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pr->println();
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}
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//------------------------------------------------------------------------------
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/** %Print a string in flash memory to Serial.
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*
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* \param[in] str Pointer to string stored in flash memory.
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*/
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void SdFatUtil::SerialPrint_P(PGM_P str) {
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print_P(SdFat::stdOut(), str);
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}
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//------------------------------------------------------------------------------
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/** %Print a string in flash memory to Serial followed by a CR/LF.
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*
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* \param[in] str Pointer to string stored in flash memory.
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*/
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void SdFatUtil::SerialPrintln_P(PGM_P str) {
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println_P(SdFat::stdOut(), str);
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}
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