My Marlin configs for Fabrikator Mini and CTC i3 Pro B
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stepper_dac.cpp 3.4KB

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  1. /**
  2. * Marlin 3D Printer Firmware
  3. * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  4. *
  5. * Based on Sprinter and grbl.
  6. * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
  7. *
  8. * This program is free software: you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation, either version 3 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  20. *
  21. */
  22. /**
  23. stepper_dac.cpp - To set stepper current via DAC
  24. Part of Marlin
  25. Copyright (c) 2016 MarlinFirmware
  26. Marlin is free software: you can redistribute it and/or modify
  27. it under the terms of the GNU General Public License as published by
  28. the Free Software Foundation, either version 3 of the License, or
  29. (at your option) any later version.
  30. Marlin is distributed in the hope that it will be useful,
  31. but WITHOUT ANY WARRANTY; without even the implied warranty of
  32. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  33. GNU General Public License for more details.
  34. You should have received a copy of the GNU General Public License
  35. along with Marlin. If not, see <http://www.gnu.org/licenses/>.
  36. */
  37. #include "Marlin.h"
  38. #if ENABLED(DAC_STEPPER_CURRENT)
  39. #include "stepper_dac.h"
  40. bool dac_present = false;
  41. const uint8_t dac_order[NUM_AXIS] = DAC_STEPPER_ORDER;
  42. int dac_init() {
  43. #if PIN_EXISTS(DAC_DISABLE)
  44. pinMode(DAC_DISABLE_PIN, OUTPUT);
  45. digitalWrite(DAC_DISABLE_PIN, LOW); // set pin low to enable DAC
  46. #endif
  47. mcp4728_init();
  48. if (mcp4728_simpleCommand(RESET)) return -1;
  49. dac_present = true;
  50. mcp4728_setVref_all(DAC_STEPPER_VREF);
  51. mcp4728_setGain_all(DAC_STEPPER_GAIN);
  52. return 0;
  53. }
  54. void dac_current_percent(uint8_t channel, float val) {
  55. if (!dac_present) return;
  56. NOMORE(val, 100);
  57. mcp4728_analogWrite(dac_order[channel], val * DAC_STEPPER_MAX / 100);
  58. mcp4728_simpleCommand(UPDATE);
  59. }
  60. void dac_current_raw(uint8_t channel, uint16_t val) {
  61. if (!dac_present) return;
  62. NOMORE(val, DAC_STEPPER_MAX);
  63. mcp4728_analogWrite(dac_order[channel], val);
  64. mcp4728_simpleCommand(UPDATE);
  65. }
  66. static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) / DAC_STEPPER_MAX; }
  67. static float dac_amps(int8_t n) { return ((2.048 * mcp4728_getValue(dac_order[n])) / 4096.0) / (8.0 * DAC_STEPPER_SENSE); }
  68. void dac_print_values() {
  69. if (!dac_present) return;
  70. SERIAL_ECHO_START;
  71. SERIAL_ECHOLNPGM("Stepper current values in % (Amps):");
  72. SERIAL_ECHO_START;
  73. SERIAL_ECHOPAIR(" X:", dac_perc(0));
  74. SERIAL_ECHOPAIR(" (", dac_amps(0));
  75. SERIAL_ECHOPAIR(") Y:", dac_perc(1));
  76. SERIAL_ECHOPAIR(" (", dac_amps(1));
  77. SERIAL_ECHOPAIR(") Z:", dac_perc(2));
  78. SERIAL_ECHOPAIR(" (", dac_amps(2));
  79. SERIAL_ECHOPAIR(") E:", dac_perc(3));
  80. SERIAL_ECHOPAIR(" (", dac_amps(3));
  81. SERIAL_ECHOLNPGM(")");
  82. }
  83. void dac_commit_eeprom() {
  84. if (!dac_present) return;
  85. mcp4728_eepromWrite();
  86. }
  87. #endif // DAC_STEPPER_CURRENT