64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* 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/>.
|
|
*/
|
|
#ifndef SdFatUtil_h
|
|
#define SdFatUtil_h
|
|
/**
|
|
* \file
|
|
* Useful utility functions.
|
|
*/
|
|
// strings and math
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
// interrupts and sleep
|
|
#include <avr/interrupt.h>
|
|
#include <avr/signal.h>
|
|
#include <avr/sleep.h>
|
|
|
|
// interrupt core (must be called before Wire)
|
|
//#include "WInterrupts.h"
|
|
|
|
#include <alloca.h>
|
|
|
|
#include <avr/pgmspace.h>
|
|
/** Defined so doxygen works for function definitions. */
|
|
#define NOINLINE __attribute__((noinline))
|
|
//------------------------------------------------------------------------------
|
|
/** Return the number of bytes currently free in RAM. */
|
|
static int FreeRam(void) {
|
|
extern int __bss_end;
|
|
extern int* __brkval;
|
|
int free_memory;
|
|
if (reinterpret_cast<int>(__brkval) == 0) {
|
|
// if no heap use from end of bss section
|
|
free_memory = reinterpret_cast<int>(&free_memory)
|
|
- reinterpret_cast<int>(&__bss_end);
|
|
} else {
|
|
// use from top of stack to heap
|
|
free_memory = reinterpret_cast<int>(&free_memory)
|
|
- reinterpret_cast<int>(__brkval);
|
|
}
|
|
return free_memory;
|
|
}
|
|
|
|
#endif // #define SdFatUtil_h
|