105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
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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 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 "Marlin.h"
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#ifdef SDSUPPORT
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#include "SdFatUtil.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 // __arm__
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extern char *__brkval;
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extern char __bss_end;
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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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return __brkval ? &top - __brkval : &top - &__bss_end;
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}
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#endif // __arm
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void SdFatUtil::set_stack_guard()
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{
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uint32_t *stack_guard;
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stack_guard = (uint32_t*)&__bss_end;
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*stack_guard = STACK_GUARD_TEST_VALUE;
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}
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bool SdFatUtil::test_stack_integrity()
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{
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uint32_t* stack_guard = (uint32_t*)&__bss_end;
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return (*stack_guard == STACK_GUARD_TEST_VALUE);
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}
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uint32_t SdFatUtil::get_stack_guard_test_value()
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{
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uint32_t* stack_guard;
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uint32_t output;
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stack_guard = (uint32_t*)&__bss_end;
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output = *stack_guard;
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return(output);
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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( PGM_P str) {
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for (uint8_t c; (c = pgm_read_byte(str)); str++) MYSERIAL.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( PGM_P str) {
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print_P( str);
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MYSERIAL.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(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( str);
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}
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#endif
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