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/* Arduino SdFat Library
* Copyright (C) 2008 by William Greiman
*
* This file is part of the Arduino SdFat Library
*
* This Library 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 Library 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 the Arduino SdFat Library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "Marlin.h"
#ifdef SDSUPPORT
#include "SdFatUtil.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 // __arm__
extern char *__brkval;
extern char __bss_end;
/** Amount of free RAM
* \return The number of free bytes.
*/
int SdFatUtil::FreeRam() {
char top;
return __brkval ? &top - __brkval : &top - &__bss_end;
}
#endif // __arm
void SdFatUtil::set_stack_guard()
{
char i = 0;
uint32_t *stack_guard;
stack_guard = (uint32_t*)&__bss_end;
//for (i = 0; i < 10; i++) {
*stack_guard = STACK_GUARD_TEST_VALUE;
//}
}
bool SdFatUtil::test_stack_integrity()
{
uint32_t* stack_guard = (uint32_t*)&__bss_end;
return (*stack_guard == STACK_GUARD_TEST_VALUE);
}
uint32_t SdFatUtil::get_stack_guard_test_value()
{
//static char i = 0;
uint32_t* stack_guard;
uint32_t output;
stack_guard = (uint32_t*)&__bss_end;
//output = *(stack_guard + i);
//i++;
output = *stack_guard;
return(output);
}
//------------------------------------------------------------------------------
/** %Print a string in flash memory.
*
* \param[in] pr Print object for output.
* \param[in] str Pointer to string stored in flash memory.
*/
void SdFatUtil::print_P( PGM_P str) {
for (uint8_t c; (c = pgm_read_byte(str)); str++) MYSERIAL.write(c);
}
//------------------------------------------------------------------------------
/** %Print a string in flash memory followed by a CR/LF.
*
* \param[in] pr Print object for output.
* \param[in] str Pointer to string stored in flash memory.
*/
void SdFatUtil::println_P( PGM_P str) {
print_P( str);
MYSERIAL.println();
}
//------------------------------------------------------------------------------
/** %Print a string in flash memory to Serial.
*
* \param[in] str Pointer to string stored in flash memory.
*/
void SdFatUtil::SerialPrint_P(PGM_P str) {
print_P(str);
}
//------------------------------------------------------------------------------
/** %Print a string in flash memory to Serial followed by a CR/LF.
*
* \param[in] str Pointer to string stored in flash memory.
*/
void SdFatUtil::SerialPrintln_P(PGM_P str) {
println_P( str);
}
#endif
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