/** * Marlin 3D Printer Firmware * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] * * Based on Sprinter and grbl. * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ /** * gcode.cpp - Temporary container for all gcode handlers * Most will migrate to classes, by feature. */ #include "gcode.h" GcodeSuite gcode; #include "parser.h" #include "queue.h" #include "../module/motion.h" #if ENABLED(PRINTCOUNTER) #include "../module/printcounter.h" #endif #if ENABLED(DIRECT_MIXING_IN_G1) #include "../feature/mixing.h" #endif #include "../Marlin.h" // for idle() and suspend_auto_report uint8_t GcodeSuite::target_extruder; millis_t GcodeSuite::previous_move_ms; bool GcodeSuite::axis_relative_modes[] = AXIS_RELATIVE_MODES; #if ENABLED(HOST_KEEPALIVE_FEATURE) GcodeSuite::MarlinBusyState GcodeSuite::busy_state = NOT_BUSY; uint8_t GcodeSuite::host_keepalive_interval = DEFAULT_KEEPALIVE_INTERVAL; #endif #if ENABLED(CNC_WORKSPACE_PLANES) GcodeSuite::WorkspacePlane GcodeSuite::workspace_plane = PLANE_XY; #endif #if ENABLED(CNC_COORDINATE_SYSTEMS) int8_t GcodeSuite::active_coordinate_system = -1; // machine space float GcodeSuite::coordinate_system[MAX_COORDINATE_SYSTEMS][XYZ]; #endif #if HAS_LEVELING && ENABLED(G29_RETRY_AND_RECOVER) #include "../feature/bedlevel/bedlevel.h" #include "../module/planner.h" #endif /** * Set target_extruder from the T parameter or the active_extruder * * Returns TRUE if the target is invalid */ bool GcodeSuite::get_target_extruder_from_command() { if (parser.seenval('T')) { const int8_t e = parser.value_byte(); if (e >= EXTRUDERS) { SERIAL_ECHO_START(); SERIAL_CHAR('M'); SERIAL_ECHO(parser.codenum); SERIAL_ECHOLNPAIR(" " MSG_INVALID_EXTRUDER " ", e); return true; } target_extruder = e; } else target_extruder = active_extruder; return false; } /** * Set XYZE destination and feedrate from the current GCode command * * - Set destination from included axis codes * - Set to current for missing axis codes * - Set the feedrate, if included */ void GcodeSuite::get_destination_from_command() { LOOP_XYZE(i) { if (parser.seen(axis_codes[i])) { const float v = parser.value_axis_units((AxisEnum)i); destination[i] = (axis_relative_modes[i] || relative_mode) ? current_position[i] + v : (i == E_AXIS) ? v : LOGICAL_TO_NATIVE(v, i); } else destination[i] = current_position[i]; } if (parser.linearval('F') > 0.0) feedrate_mm_s = MMM_TO_MMS(parser.value_feedrate()); #if ENABLED(PRINTCOUNTER) if (!DEBUGGING(DRYRUN)) print_job_timer.incFilamentUsed(destination[E_AXIS] - current_position[E_AXIS]); #endif // Get ABCDHI mixing factors #if ENABLED(MIXING_EXTRUDER) && ENABLED(DIRECT_MIXING_IN_G1) gcode_get_mix(); #endif } /** * Dwell waits immediately. It does not synchronize. Use M400 instead of G4 */ void GcodeSuite::dwell(millis_t time) { time += millis(); while (PENDING(millis(), time)) idle(); } /** * When G29_RETRY_AND_RECOVER is enabled, call G29() in * a loop with recovery and retry handling. */ #if HAS_LEVELING && ENABLED(G29_RETRY_AND_RECOVER) void GcodeSuite::G29_with_retry() { set_bed_leveling_enabled(false); for (uint8_t i = G29_MAX_RETRIES; i--;) { G29(); if (planner.leveling_active) break; #ifdef G29_ACTION_ON_RECOVER SERIAL_ECHOLNPGM("//action:" G29_ACTION_ON_RECOVER); #endif #ifdef G29_RECOVER_COMMANDS process_subcommands_now_P(PSTR(G29_RECOVER_COMMANDS)); #endif } if (planner.leveling_active) { #ifdef G29_SUCCESS_COMMANDS process_subcommands_now_P(PSTR(G29_SUCCESS_COMMANDS)); #endif } else { #ifdef G29_FAILURE_COMMANDS process_subcommands_now_P(PSTR(G29_FAILURE_COMMANDS)); #endif #ifdef G29_ACTION_ON_FAILURE SERIAL_ECHOLNPGM("//action:" G29_ACTION_ON_FAILURE); #endif #if ENABLED(G29_HALT_ON_FAILURE) kill(PSTR(MSG_ERR_PROBING_FAILED)); #endif } } #endif // HAS_LEVELING && G29_RETRY_AND_RECOVER // // Placeholders for non-migrated codes // #if ENABLED(M100_FREE_MEMORY_WATCHER) extern void M100_dump_routine(const char * const title, const char *start, const char *end); #endif /** * Process the parsed command and dispatch it to its handler */ void GcodeSuite::process_parsed_command( #if ENABLED(USE_EXECUTE_COMMANDS_IMMEDIATE) const bool no_ok #endif ) { KEEPALIVE_STATE(IN_HANDLER); // Handle a known G, M, or T switch (parser.command_letter) { case 'G': switch (parser.codenum) { case 0: case 1: G0_G1( // G0: Fast Move, G1: Linear Move #if IS_SCARA parser.codenum == 0 #endif ); break; #if ENABLED(ARC_SUPPORT) && DISABLED(SCARA) case 2: case 3: G2_G3(parser.codenum == 2); break; // G2: CW ARC, G3: CCW ARC #endif case 4: G4(); break; // G4: Dwell #if ENABLED(BEZIER_CURVE_SUPPORT) case 5: G5(); break; // G5: Cubic B_spline #endif #if ENABLED(FWRETRACT) case 10: G10(); break; // G10: Retract / Swap Retract case 11: G11(); break; // G11: Recover / Swap Recover #endif #if ENABLED(NOZZLE_CLEAN_FEATURE) case 12: G12(); break; // G12: Nozzle Clean #endif #if ENABLED(CNC_WORKSPACE_PLANES) case 17: G17(); break; // G17: Select Plane XY case 18: G18(); break; // G18: Select Plane ZX case 19: G19(); break; // G19: Select Plane YZ #endif #if ENABLED(INCH_MODE_SUPPORT) case 20: G20(); break; // G20: Inch Mode case 21: G21(); break; // G21: MM Mode #endif #if ENABLED(G26_MESH_VALIDATION) case 26: G26(); break; // G26: Mesh Validation Pattern generation #endif #if ENABLED(NOZZLE_PARK_FEATURE) case 27: G27(); break; // G27: Nozzle Park #endif case 28: G28(false); break; // G28: Home all axes, one at a time #if HAS_LEVELING case 29: // G29: Bed leveling calibration #if ENABLED(G29_RETRY_AND_RECOVER) G29_with_retry(); #else G29(); #endif break; #endif // HAS_LEVELING #if HAS_BED_PROBE case 30: G30(); break; // G30: Single Z probe #if ENABLED(Z_PROBE_SLED) case 31: G31(); break; // G31: dock the sled case 32: G32(); break; // G32: undock the sled #endif #endif #if ENABLED(DELTA_AUTO_CALIBRATION) case 33: G33(); break; // G33: Delta Auto-Calibration #endif #if ENABLED(G38_PROBE_TARGET) case 38: // G38.2 & G38.3 if (parser.subcode == 2 || parser.subcode == 3) G38(parser.subcode == 2); break; #endif case 90: relative_mode = false; break; // G90: Relative Mode case 91: relative_mode = true; break; // G91: Absolute Mode case 92: G92(); break; // G92: Set current axis position(s) #if HAS_MESH case 42: G42(); break; // G42: Coordinated move to a mesh point #endif #if ENABLED(DEBUG_GCODE_PARSER) case 800: parser.debug(); break; // G800: GCode Parser Test for G #endif } break; case 'M': switch (parser.codenum) { #if HAS_RESUME_CONTINUE case 0: // M0: Unconditional stop - Wait for user button press on LCD case 1: M0_M1(); break; // M1: Conditional stop - Wait for user button press on LCD #endif #if ENABLED(SPINDLE_LASER_ENABLE) case 3: M3_M4(true ); break; // M3: turn spindle/laser on, set laser/spindle power/speed, set rotation direction CW case 4: M3_M4(false); break; // M4: turn spindle/laser on, set laser/spindle power/speed, set rotation direction CCW case 5: M5(); break; // M5 - turn spindle/laser off #endif case 17: M17(); break; // M17: Enable all stepper motors #if ENABLED(SDSUPPORT) case 20: M20(); break; // M20: list SD card case 21: M21(); break; // M21: init SD card case 22: M22(); break; // M22: release SD card case 23: M23(); break; // M23: Select file case 24: M24(); break; // M24: Start SD print case 25: M25(); break; // M25: Pause SD print case 26: M26(); break; // M26: Set SD index case 27: M27(); break; // M27: Get SD status case 28: M28(); break; // M28: Start SD write case 29: M29(); break; // M29: Stop SD write case 30: M30(); break; // M30 Delete File case 32: M32(); break; // M32: Select file and start SD print #if ENABLED(LONG_FILENAME_HOST_SUPPORT) case 33: M33(); break; // M33: Get the long full path to a file or folder #endif #if ENABLED(SDCARD_SORT_ALPHA) && ENABLED(SDSORT_GCODE) case 34: M34(); break; // M34: Set SD card sorting options #endif case 928: M928(); break; // M928: Start SD write #endif // SDSUPPORT case 31: M31(); break; // M31: Report time since the start of SD print or last M109 case 42: M42(); break; // M42: Change pin state #if ENABLED(PINS_DEBUGGING) case 43: M43(); break; // M43: Read pin state #endif #if ENABLED(Z_MIN_PROBE_REPEATABILITY_TEST) case 48: M48(); break; // M48: Z probe repeatability test #endif #if ENABLED(G26_MESH_VALIDATION) case 49: M49(); break; // M49: Turn on or off G26 debug flag for verbose output #endif #if ENABLED(ULTRA_LCD) && ENABLED(LCD_SET_PROGRESS_MANUALLY) case 73: M73(); break; // M73: Set progress percentage (for display on LCD) #endif case 75: M75(); break; // M75: Start print timer case 76: M76(); break; // M76: Pause print timer case 77: M77(); break; // M77: Stop print timer #if ENABLED(PRINTCOUNTER) case 78: M78(); break; // M78: Show print statistics #endif #if ENABLED(M100_FREE_MEMORY_WATCHER) case 100: M100(); break; // M100: Free Memory Report #endif case 104: M104(); break; // M104: Set hot end temperature case 109: M109(); break; // M109: Wait for hotend temperature to reach target case 110: M110(); break; // M110: Set Current Line Number case 111: M111(); break; // M111: Set debug level #if DISABLED(EMERGENCY_PARSER) case 108: M108(); break; // M108: Cancel Waiting case 112: M112(); break; // M112: Emergency Stop case 410: M410(); break; // M410: Quickstop - Abort all the planned moves. #endif #if ENABLED(HOST_KEEPALIVE_FEATURE) case 113: M113(); break; // M113: Set Host Keepalive interval #endif #if HAS_HEATED_BED case 140: M140(); break; // M140: Set bed temperature case 190: M190(); break; // M190: Wait for bed temperature to reach target #endif case 105: M105(); KEEPALIVE_STATE(NOT_BUSY); return; // M105: Report Temperatures (and say "ok") #if ENABLED(AUTO_REPORT_TEMPERATURES) && HAS_TEMP_SENSOR case 155: M155(); break; // M155: Set temperature auto-report interval #endif #if FAN_COUNT > 0 case 106: M106(); break; // M106: Fan On case 107: M107(); break; // M107: Fan Off #endif #if ENABLED(PARK_HEAD_ON_PAUSE) case 125: M125(); break; // M125: Store current position and move to filament change position #endif #if ENABLED(BARICUDA) // PWM for HEATER_1_PIN #if HAS_HEATER_1 case 126: M126(); break; // M126: valve open case 127: M127(); break; // M127: valve closed #endif // PWM for HEATER_2_PIN #if HAS_HEATER_2 case 128: M128(); break; // M128: valve open case 129: M129(); break; // M129: valve closed #endif #endif // BARICUDA #if HAS_POWER_SWITCH case 80: M80(); break; // M80: Turn on Power Supply #endif case 81: M81(); break; // M81: Turn off Power, including Power Supply, if possible case 82: M82(); break; // M82: Set E axis normal mode (same as other axes) case 83: M83(); break; // M83: Set E axis relative mode case 18: case 84: M18_M84(); break; // M18/M84: Disable Steppers / Set Timeout case 85: M85(); break; // M85: Set inactivity stepper shutdown timeout case 92: M92(); break; // M92: Set the steps-per-unit for one or more axes case 114: M114(); break; // M114: Report current position case 115: M115(); break; // M115: Report capabilities case 117: M117(); break; // M117: Set LCD message text, if possible case 118: M118(); break; // M118: Display a message in the host console case 119: M119(); break; // M119: Report endstop states case 120: M120(); break; // M120: Enable endstops case 121: M121(); break; // M121: Disable endstops #if ENABLED(ULTIPANEL) case 145: M145(); break; // M145: Set material heatup parameters #endif #if ENABLED(TEMPERATURE_UNITS_SUPPORT) case 149: M149(); break; // M149: Set temperature units #endif #if HAS_COLOR_LEDS case 150: M150(); break; // M150: Set Status LED Color #endif #if ENABLED(MIXING_EXTRUDER) case 163: M163(); break; // M163: Set a component weight for mixing extruder #if MIXING_VIRTUAL_TOOLS > 1 case 164: M164(); break; // M164: Save current mix as a virtual extruder #endif #if ENABLED(DIRECT_MIXING_IN_G1) case 165: M165(); break; // M165: Set multiple mix weights #endif #endif #if DISABLED(NO_VOLUMETRICS) case 200: M200(); break; // M200: Set filament diameter, E to cubic units #endif case 201: M201(); break; // M201: Set max acceleration for print moves (units/s^2) #if 0 case 202: M202(); break; // M202: Not used for Sprinter/grbl gen6 #endif case 203: M203(); break; // M203: Set max feedrate (units/sec) case 204: M204(); break; // M204: Set acceleration case 205: M205(); break; // M205: Set advanced settings #if HAS_M206_COMMAND case 206: M206(); break; // M206: Set home offsets #endif #if ENABLED(DELTA) case 665: M665(); break; // M665: Set delta configurations #endif #if ENABLED(DELTA) || ENABLED(X_DUAL_ENDSTOPS) || ENABLED(Y_DUAL_ENDSTOPS) || ENABLED(Z_DUAL_ENDSTOPS) case 666: M666(); break; // M666: Set delta or dual endstop adjustment #endif #if ENABLED(FWRETRACT) case 207: M207(); break; // M207: Set Retract Length, Feedrate, and Z lift case 208: M208(); break; // M208: Set Recover (unretract) Additional Length and Feedrate case 209: if (MIN_AUTORETRACT <= MAX_AUTORETRACT) M209(); // M209: Turn Automatic Retract Detection on/off break; #endif case 211: M211(); break; // M211: Enable, Disable, and/or Report software endstops #if HOTENDS > 1 case 218: M218(); break; // M218: Set a tool offset #endif case 220: M220(); break; // M220: Set Feedrate Percentage: S ("FR" on your LCD) case 221: M221(); break; // M221: Set Flow Percentage case 226: M226(); break; // M226: Wait until a pin reaches a state #if HAS_SERVOS case 280: M280(); break; // M280: Set servo position absolute #endif #if ENABLED(BABYSTEPPING) case 290: M290(); break; // M290: Babystepping #endif #if HAS_BUZZER case 300: M300(); break; // M300: Play beep tone #endif #if ENABLED(PIDTEMP) case 301: M301(); break; // M301: Set hotend PID parameters #endif #if ENABLED(PIDTEMPBED) case 304: M304(); break; // M304: Set bed PID parameters #endif #if defined(CHDK) || HAS_PHOTOGRAPH case 240: M240(); break; // M240: Trigger a camera by emulating a Canon RC-1 : http://www.doc-diy.net/photo/rc-1_hacked/ #endif #if HAS_LCD_CONTRAST case 250: M250(); break; // M250: Set LCD contrast #endif #if ENABLED(EXPERIMENTAL_I2CBUS) case 260: M260(); break; // M260: Send data to an i2c slave case 261: M261(); break; // M261: Request data from an i2c slave #endif #if ENABLED(PREVENT_COLD_EXTRUSION) case 302: M302(); break; // M302: Allow cold extrudes (set the minimum extrude temperature) #endif case 303: M303(); break; // M303: PID autotune #if ENABLED(MORGAN_SCARA) case 360: if (M360()) return; break; // M360: SCARA Theta pos1 case 361: if (M361()) return; break; // M361: SCARA Theta pos2 case 362: if (M362()) return; break; // M362: SCARA Psi pos1 case 363: if (M363()) return; break; // M363: SCARA Psi pos2 case 364: if (M364()) return; break; // M364: SCARA Psi pos3 (90 deg to Theta) #endif #if ENABLED(EXT_SOLENOID) case 380: M380(); break; // M380: Activate solenoid on active extruder case 381: M381(); break; // M381: Disable all solenoids #endif case 400: M400(); break; // M400: Finish all moves #if HAS_BED_PROBE case 401: M401(); break; // M401: Deploy probe case 402: M402(); break; // M402: Stow probe #endif #if ENABLED(FILAMENT_WIDTH_SENSOR) case 404: M404(); break; // M404: Enter the nominal filament width (3mm, 1.75mm ) N<3.0> or display nominal filament width case 405: M405(); break; // M405: Turn on filament sensor for control case 406: M406(); break; // M406: Turn off filament sensor for control case 407: M407(); break; // M407: Display measured filament diameter #endif #if HAS_LEVELING case 420: M420(); break; // M420: Enable/Disable Bed Leveling #endif #if HAS_MESH case 421: M421(); break; // M421: Set a Mesh Bed Leveling Z coordinate #endif #if HAS_M206_COMMAND case 428: M428(); break; // M428: Apply current_position to home_offset #endif case 500: M500(); break; // M500: Store settings in EEPROM case 501: M501(); break; // M501: Read settings from EEPROM case 502: M502(); break; // M502: Revert to default settings #if DISABLED(DISABLE_M503) case 503: M503(); break; // M503: print settings currently in memory #endif #if ENABLED(EEPROM_SETTINGS) case 504: M504(); break; // M504: Validate EEPROM contents #endif #if ENABLED(ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED) case 540: M540(); break; // M540: Set abort on endstop hit for SD printing #endif #if HAS_BED_PROBE case 851: M851(); break; // M851: Set Z Probe Z Offset #endif #if ENABLED(SKEW_CORRECTION_GCODE) case 852: M852(); break; // M852: Set Skew factors #endif #if ENABLED(ADVANCED_PAUSE_FEATURE) case 600: M600(); break; // M600: Pause for Filament Change case 603: M603(); break; // M603: Configure Filament Change #endif #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(DUAL_NOZZLE_DUPLICATION_MODE) case 605: M605(); break; // M605: Set Dual X Carriage movement mode #endif #if ENABLED(FILAMENT_LOAD_UNLOAD_GCODES) case 701: M701(); break; // M701: Load Filament case 702: M702(); break; // M702: Unload Filament #endif #if ENABLED(LIN_ADVANCE) case 900: M900(); break; // M900: Set advance K factor. #endif #if HAS_DIGIPOTSS || HAS_MOTOR_CURRENT_PWM || ENABLED(DIGIPOT_I2C) || ENABLED(DAC_STEPPER_CURRENT) case 907: M907(); break; // M907: Set digital trimpot motor current using axis codes. #if HAS_DIGIPOTSS || ENABLED(DAC_STEPPER_CURRENT) case 908: M908(); break; // M908: Control digital trimpot directly. #if ENABLED(DAC_STEPPER_CURRENT) case 909: M909(); break; // M909: Print digipot/DAC current value case 910: M910(); break; // M910: Commit digipot/DAC value to external EEPROM #endif #endif #endif #if HAS_TRINAMIC #if ENABLED(TMC_DEBUG) case 122: M122(); break; #endif case 906: M906(); break; // M906: Set motor current in milliamps using axis codes X, Y, Z, E case 911: M911(); break; // M911: Report TMC2130 prewarn triggered flags case 912: M912(); break; // M912: Clear TMC2130 prewarn triggered flags #if ENABLED(HYBRID_THRESHOLD) case 913: M913(); break; // M913: Set HYBRID_THRESHOLD speed. #endif #if ENABLED(SENSORLESS_HOMING) case 914: M914(); break; // M914: Set SENSORLESS_HOMING sensitivity. #endif #if ENABLED(TMC_Z_CALIBRATION) case 915: M915(); break; // M915: TMC Z axis calibration. #endif #endif #if HAS_MICROSTEPS case 350: M350(); break; // M350: Set microstepping mode. Warning: Steps per unit remains unchanged. S code sets stepping mode for all drivers. case 351: M351(); break; // M351: Toggle MS1 MS2 pins directly, S# determines MS1 or MS2, X# sets the pin high/low. #endif case 355: M355(); break; // M355: Set case light brightness #if ENABLED(DEBUG_GCODE_PARSER) case 800: parser.debug(); break; // M800: GCode Parser Test for M #endif #if ENABLED(I2C_POSITION_ENCODERS) case 860: M860(); break; // M860: Report encoder module position case 861: M861(); break; // M861: Report encoder module status case 862: M862(); break; // M862: Perform axis test case 863: M863(); break; // M863: Calibrate steps/mm case 864: M864(); break; // M864: Change module address case 865: M865(); break; // M865: Check module firmware version case 866: M866(); break; // M866: Report axis error count case 867: M867(); break; // M867: Toggle error correction case 868: M868(); break; // M868: Set error correction threshold case 869: M869(); break; // M869: Report axis error #endif case 999: M999(); break; // M999: Restart after being Stopped } break; case 'T': T(parser.codenum); break; // Tn: Tool Change default: parser.unknown_command_error(); } KEEPALIVE_STATE(NOT_BUSY); #if ENABLED(USE_EXECUTE_COMMANDS_IMMEDIATE) if (!no_ok) #endif ok_to_send(); } /** * Process a single command and dispatch it to its handler * This is called from the main loop() */ void GcodeSuite::process_next_command() { char * const current_command = command_queue[cmd_queue_index_r]; if (DEBUGGING(ECHO)) { SERIAL_ECHO_START(); SERIAL_ECHOLN(current_command); #if ENABLED(M100_FREE_MEMORY_WATCHER) SERIAL_ECHOPAIR("slot:", cmd_queue_index_r); M100_dump_routine(" Command Queue:", (const char*)command_queue, (const char*)(command_queue + sizeof(command_queue))); #endif } reset_stepper_timeout(); // Keep steppers powered // Parse the next command in the queue parser.parse(current_command); process_parsed_command(); } #if ENABLED(USE_EXECUTE_COMMANDS_IMMEDIATE) /** * Run a series of commands, bypassing the command queue to allow * G-code "macros" to be called from within other G-code handlers. */ void GcodeSuite::process_subcommands_now_P(const char *pgcode) { // Save the parser state const char * const saved_cmd = parser.command_ptr; // Process individual commands in string while (pgm_read_byte_near(pgcode)) { // Break up string at '\n' delimiters const char *delim = strchr_P(pgcode, '\n'); size_t len = delim ? delim - pgcode : strlen_P(pgcode); char cmd[len + 1]; strncpy_P(cmd, pgcode, len); cmd[len] = '\0'; pgcode += len; if (delim) pgcode++; // Parse the next command in the string parser.parse(cmd); process_parsed_command(true); } // Restore the parser state parser.parse(saved_cmd); } #endif #if ENABLED(HOST_KEEPALIVE_FEATURE) /** * Output a "busy" message at regular intervals * while the machine is not accepting commands. */ void GcodeSuite::host_keepalive() { const millis_t ms = millis(); static millis_t next_busy_signal_ms = 0; if (!suspend_auto_report && host_keepalive_interval && busy_state != NOT_BUSY) { if (PENDING(ms, next_busy_signal_ms)) return; switch (busy_state) { case IN_HANDLER: case IN_PROCESS: SERIAL_ECHO_START(); SERIAL_ECHOLNPGM(MSG_BUSY_PROCESSING); break; case PAUSED_FOR_USER: SERIAL_ECHO_START(); SERIAL_ECHOLNPGM(MSG_BUSY_PAUSED_FOR_USER); break; case PAUSED_FOR_INPUT: SERIAL_ECHO_START(); SERIAL_ECHOLNPGM(MSG_BUSY_PAUSED_FOR_INPUT); break; default: break; } } next_busy_signal_ms = ms + host_keepalive_interval * 1000UL; } #endif // HOST_KEEPALIVE_FEATURE