Method D

Marlin/src/gcode/gcode_d.cpp:50–294

* Dn: G-code for development and testing * * See https://reprap.org/wiki/G-code#D:_Debug_codes * * Put whatever else you need here to test ongoing development. */

 * Put whatever else you need here to test ongoing development.
 */
void GcodeSuite::D(const int16_t dcode) {
  switch (dcode) {

    case -1:
      for (;;) { /* loop forever (watchdog reset) */ }

    case 0:
      hal.reboot();
      break;

    case 10:
      kill(F("D10"), F("KILL TEST"), parser.seen_test('P'));
      break;

    case 1: {
      // Zero or pattern-fill the EEPROM data
      #if ENABLED(EEPROM_SETTINGS)
        persistentStore.access_start();
        size_t total = persistentStore.capacity();
        int pos = 0;
        const uint8_t value = 0x0;
        while (total--) persistentStore.write_data(pos, &value, 1);
        persistentStore.access_finish();
      #else
        settings.reset();
        settings.save();
      #endif
      hal.reboot();
    } break;

    case 2: { // D2 Read / Write SRAM
      #define SRAM_SIZE 8192
      uint8_t *pointer = parser.hex_adr_val('A');
      uint16_t len = parser.ushortval('C', 1);
      uintptr_t addr = (uintptr_t)pointer;
      NOMORE(addr, size_t(SRAM_SIZE - 1));
      NOMORE(len, SRAM_SIZE - addr);
      if (parser.seenval('X')) {
        // Write the hex bytes after the X
        uint16_t val = parser.hex_val('X');
        while (len--) {
          *pointer = val;
          pointer++;
        }
      }
      else {
        while (len--) print_hex_byte(*(pointer++));
        SERIAL_EOL();
      }
    } break;

    #if ENABLED(EEPROM_SETTINGS)

      case 3: { // D3 Read / Write EEPROM
        uint8_t *pointer = parser.hex_adr_val('A');
        uint16_t len = parser.ushortval('C', 1);
        uintptr_t addr = (uintptr_t)pointer;
        NOMORE(addr, size_t(persistentStore.capacity() - 1));