1 /* Arduino SdFat Library
2 * Copyright (C) 2008 by William Greiman
4 * This file is part of the Arduino SdFat Library
6 * This Library is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This Library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with the Arduino SdFat Library. If not, see
18 * <http://www.gnu.org/licenses/>.
24 * Useful utility functions.
30 #include <avr/pgmspace.h>
32 /** Store and print a string in flash memory.*/
33 #define PgmPrint(x) SerialPrint_P(PSTR(x))
34 /** Store and print a string in flash memory followed by a CR/LF.*/
35 #define PgmPrintln(x) SerialPrintln_P(PSTR(x))
36 /** Defined so doxygen works for function definitions. */
37 #define NOINLINE __attribute__((noinline))
38 //------------------------------------------------------------------------------
39 /** Return the number of bytes currently free in RAM. */
40 static int FreeRam(void) {
44 if (reinterpret_cast<int>(__brkval) == 0) {
45 // if no heap use from end of bss section
46 free_memory = reinterpret_cast<int>(&free_memory)
47 - reinterpret_cast<int>(&__bss_end);
49 // use from top of stack to heap
50 free_memory = reinterpret_cast<int>(&free_memory)
51 - reinterpret_cast<int>(__brkval);
55 //------------------------------------------------------------------------------
57 * %Print a string in flash memory to the serial port.
59 * \param[in] str Pointer to string stored in flash memory.
61 static NOINLINE void SerialPrint_P(PGM_P str) {
62 for (uint8_t c; (c = pgm_read_byte(str)); str++) Serial.print(c);
64 //------------------------------------------------------------------------------
66 * %Print a string in flash memory followed by a CR/LF.
68 * \param[in] str Pointer to string stored in flash memory.
70 static NOINLINE void SerialPrintln_P(PGM_P str) {
74 #endif // #define SdFatUtil_h