SdFatUtil.cpp 2.6 KB

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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. * You should have received a copy of the GNU General Public License
  16. * along with the Arduino SdFat Library. If not, see
  17. * <http://www.gnu.org/licenses/>.
  18. */
  19. #include "Marlin.h"
  20. #ifdef SDSUPPORT
  21. #include "SdFatUtil.h"
  22. //------------------------------------------------------------------------------
  23. /** Amount of free RAM
  24. * \return The number of free bytes.
  25. */
  26. int SdFatUtil::FreeRam() {
  27. extern int __bss_end;
  28. extern int* __brkval;
  29. int free_memory;
  30. if (reinterpret_cast<int>(__brkval) == 0) {
  31. // if no heap use from end of bss section
  32. free_memory = reinterpret_cast<int>(&free_memory)
  33. - reinterpret_cast<int>(&__bss_end);
  34. } else {
  35. // use from top of stack to heap
  36. free_memory = reinterpret_cast<int>(&free_memory)
  37. - reinterpret_cast<int>(__brkval);
  38. }
  39. return free_memory;
  40. }
  41. //------------------------------------------------------------------------------
  42. /** %Print a string in flash memory.
  43. *
  44. * \param[in] pr Print object for output.
  45. * \param[in] str Pointer to string stored in flash memory.
  46. */
  47. void SdFatUtil::print_P( PGM_P str) {
  48. for (uint8_t c; (c = pgm_read_byte(str)); str++) MYSERIAL.write(c);
  49. }
  50. //------------------------------------------------------------------------------
  51. /** %Print a string in flash memory followed by a CR/LF.
  52. *
  53. * \param[in] pr Print object for output.
  54. * \param[in] str Pointer to string stored in flash memory.
  55. */
  56. void SdFatUtil::println_P( PGM_P str) {
  57. print_P( str);
  58. MYSERIAL.println();
  59. }
  60. //------------------------------------------------------------------------------
  61. /** %Print a string in flash memory to Serial.
  62. *
  63. * \param[in] str Pointer to string stored in flash memory.
  64. */
  65. void SdFatUtil::SerialPrint_P(PGM_P str) {
  66. print_P(str);
  67. }
  68. //------------------------------------------------------------------------------
  69. /** %Print a string in flash memory to Serial followed by a CR/LF.
  70. *
  71. * \param[in] str Pointer to string stored in flash memory.
  72. */
  73. void SdFatUtil::SerialPrintln_P(PGM_P str) {
  74. println_P( str);
  75. }
  76. #endif