comparison: SdFatUtil.cpp
SdFatUtil.cpp
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| 1 /* Arduino SdFat Library | |
| 2 * Copyright (C) 2008 by William Greiman | |
| 3 * | |
| 4 * This file is part of the Arduino SdFat Library | |
| 5 * | |
| 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. | |
| 10 * | |
| 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. | |
| 15 | |
| 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/>. | |
| 19 */ | |
| 20 #include "Marlin.h" | |
| 21 | |
| 22 #ifdef SDSUPPORT | |
| 23 #include "SdFatUtil.h" | |
| 24 | |
| 25 //------------------------------------------------------------------------------ | |
| 26 /** Amount of free RAM | |
| 27 * \return The number of free bytes. | |
| 28 */ | |
| 29 int SdFatUtil::FreeRam() { | |
| 30 extern int __bss_end; | |
| 31 extern int* __brkval; | |
| 32 int free_memory; | |
| 33 if (reinterpret_cast<int>(__brkval) == 0) { | |
| 34 // if no heap use from end of bss section | |
| 35 free_memory = reinterpret_cast<int>(&free_memory) | |
| 36 - reinterpret_cast<int>(&__bss_end); | |
| 37 } else { | |
| 38 // use from top of stack to heap | |
| 39 free_memory = reinterpret_cast<int>(&free_memory) | |
| 40 - reinterpret_cast<int>(__brkval); | |
| 41 } | |
| 42 return free_memory; | |
| 43 } | |
| 44 //------------------------------------------------------------------------------ | |
| 45 /** %Print a string in flash memory. | |
| 46 * | |
| 47 * \param[in] pr Print object for output. | |
| 48 * \param[in] str Pointer to string stored in flash memory. | |
| 49 */ | |
| 50 void SdFatUtil::print_P( PGM_P str) { | |
| 51 for (uint8_t c; (c = pgm_read_byte(str)); str++) MYSERIAL.write(c); | |
| 52 } | |
| 53 //------------------------------------------------------------------------------ | |
| 54 /** %Print a string in flash memory followed by a CR/LF. | |
| 55 * | |
| 56 * \param[in] pr Print object for output. | |
| 57 * \param[in] str Pointer to string stored in flash memory. | |
| 58 */ | |
| 59 void SdFatUtil::println_P( PGM_P str) { | |
| 60 print_P( str); | |
| 61 MYSERIAL.println(); | |
| 62 } | |
| 63 //------------------------------------------------------------------------------ | |
| 64 /** %Print a string in flash memory to Serial. | |
| 65 * | |
| 66 * \param[in] str Pointer to string stored in flash memory. | |
| 67 */ | |
| 68 void SdFatUtil::SerialPrint_P(PGM_P str) { | |
| 69 print_P(str); | |
| 70 } | |
| 71 //------------------------------------------------------------------------------ | |
| 72 /** %Print a string in flash memory to Serial followed by a CR/LF. | |
| 73 * | |
| 74 * \param[in] str Pointer to string stored in flash memory. | |
| 75 */ | |
| 76 void SdFatUtil::SerialPrintln_P(PGM_P str) { | |
| 77 println_P( str); | |
| 78 } | |
| 79 #endif |
