Extend M106/M107 for better laser module support

Marlin/Configuration_adv.h

@@ -3217,6 +3217,18 @@
   #endif
 #endif
 
+/**
+ * Synchronous Laser Control with M106/M107
+ *
+ * Marlin normally applies M106/M107 fan speeds at a time "soon after" processing
+ * a planner block. This is too inaccurate for a PWM/TTL laser attached to the fan
+ * header (as with some add-on laser kits). Enable this option to set fan/laser
+ * speeds with much more exact timing for improved print fidelity.
+ *
+ * NOTE: This option sacrifices some cooling fan speed options.
+ */
+//#define LASER_SYNCHRONOUS_M106_M107
+
 /**
  * Coolant Control
  *

Marlin/src/gcode/temp/M106_M107.cpp

@@ -28,6 +28,10 @@
 #include "../../module/motion.h"
 #include "../../module/temperature.h"
 
+#if ENABLED(LASER_SYNCHRONOUS_M106_M107)
+  #include "../../module/planner.h"
+#endif
+
 #if PREHEAT_COUNT
   #include "../../lcd/marlinui.h"
 #endif
@@ -82,6 +86,8 @@ void GcodeSuite::M106() {
     // Set speed, with constraint
     thermalManager.set_fan_speed(pfan, speed);
 
+    TERN_(LASER_SYNCHRONOUS_M106_M107, planner.buffer_sync_block(BLOCK_FLAG_SYNC_FANS));
+
     if (TERN0(DUAL_X_CARRIAGE, idex_is_duplicating()))  // pfan == 0 when duplicating
       thermalManager.set_fan_speed(1 - pfan, speed);
   }
@@ -92,12 +98,14 @@ void GcodeSuite::M106() {
  */
 void GcodeSuite::M107() {
   const uint8_t pfan = parser.byteval('P', _ALT_P);
-  if (pfan < _CNT_P) {
-    thermalManager.set_fan_speed(pfan, 0);
+  if (pfan >= _CNT_P) return;
 
-    if (TERN0(DUAL_X_CARRIAGE, idex_is_duplicating()))  // pfan == 0 when duplicating
-      thermalManager.set_fan_speed(1 - pfan, 0);
-  }
+  thermalManager.set_fan_speed(pfan, 0);
+
+  if (TERN0(DUAL_X_CARRIAGE, idex_is_duplicating()))  // pfan == 0 when duplicating
+    thermalManager.set_fan_speed(1 - pfan, 0);
+
+  TERN_(LASER_SYNCHRONOUS_M106_M107, planner.buffer_sync_block(BLOCK_FLAG_SYNC_FANS));
 }
 
 #endif // HAS_FAN

Marlin/src/inc/SanityCheck.h

@@ -1217,6 +1217,17 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
   #error "To use BED_LIMIT_SWITCHING you must disable PIDTEMPBED."
 #endif
 
+/**
+ * Synchronous M106/M107 checks
+ */
+#if ENABLED(LASER_SYNCHRONOUS_M106_M107)
+  #if FAN_KICKSTART_TIME
+    #error "FAN_KICKSTART_TIME must be 0 with LASER_SYNCHRONOUS_M106_M107 (because the laser will always come on at FULL power)."
+  #elif FAN_MIN_PWM
+    #error "FAN_MIN_PWM must be 0 with LASER_SYNCHRONOUS_M106_M107 (otherwise the laser will never turn OFF)."
+  #endif
+#endif
+
 /**
  * Chamber Heating Options - PID vs Limit Switching
  */

Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp

@@ -760,7 +760,7 @@ void MarlinUI::draw_status_screen() {
     #endif
   #endif // HAS_HEATED_BED
 
-  #if FAN_COUNT > 0
+  #if HAS_FAN
     uint16_t spd = thermalManager.fan_speed[0];
 
     #if ENABLED(ADAPTIVE_FAN_SLOWING)
@@ -783,7 +783,7 @@ void MarlinUI::draw_status_screen() {
     else
       picBits &= ~ICON_FAN;
 
-  #endif // FAN_COUNT > 0
+  #endif // HAS_FAN
 
   //
   // Line 9, 10 - icons

Marlin/src/lcd/dwin/e3v2/dwin.cpp

@@ -2152,7 +2152,7 @@ void HMI_SelectFile() {
 
       card.openAndPrintFile(card.filename);
 
-      #if FAN_COUNT > 0
+      #if HAS_FAN
         // All fans on for Ender 3 v2 ?
         // The slicer should manage this for us.
         //for (uint8_t i = 0; i < FAN_COUNT; i++)

Marlin/src/lcd/marlinui.cpp

@@ -22,6 +22,8 @@
 
 #include "../inc/MarlinConfig.h"
 
+#include "../MarlinCore.h" // for printingIsPaused
+
 #ifdef LED_BACKLIGHT_TIMEOUT
   #include "../feature/leds/leds.h"
 #endif
@@ -39,21 +41,21 @@
 MarlinUI ui;
 
 #if HAS_DISPLAY
-  #include "../module/printcounter.h"
-  #include "../MarlinCore.h"
   #include "../gcode/queue.h"
   #include "fontutils.h"
   #include "../sd/cardreader.h"
 #endif
 
 #if ENABLED(DWIN_CREALITY_LCD)
-  #include "../module/printcounter.h"
-  #include "../MarlinCore.h"
   #include "dwin/e3v2/dwin.h"
 #endif
 
-#if HAS_STATUS_MESSAGE
-  #define START_OF_UTF8_CHAR(C) (((C) & 0xC0u) != 0x80U)
+#if ENABLED(LCD_PROGRESS_BAR) && !IS_TFTGLCD_PANEL
+  #define BASIC_PROGRESS_BAR 1
+#endif
+
+#if ANY(HAS_DISPLAY, HAS_STATUS_MESSAGE, BASIC_PROGRESS_BAR)
+  #include "../module/printcounter.h"
 #endif
 
 #if LCD_HAS_WAIT_FOR_MOVE
@@ -535,7 +537,7 @@ bool MarlinUI::get_blink() {
  * This is very display-dependent, so the lcd implementation draws this.
  */
 
-#if ENABLED(LCD_PROGRESS_BAR) && !IS_TFTGLCD_PANEL
+#if BASIC_PROGRESS_BAR
   millis_t MarlinUI::progress_bar_ms; // = 0
   #if PROGRESS_MSG_EXPIRE > 0
     millis_t MarlinUI::expire_status_ms; // = 0
@@ -546,7 +548,7 @@ void MarlinUI::status_screen() {
 
   TERN_(HAS_LCD_MENU, ENCODER_RATE_MULTIPLY(false));
 
-  #if ENABLED(LCD_PROGRESS_BAR) && !IS_TFTGLCD_PANEL
+  #if BASIC_PROGRESS_BAR
 
     //
     // HD44780 implements the following message blinking and
@@ -586,7 +588,7 @@ void MarlinUI::status_screen() {
 
     #endif // PROGRESS_MSG_EXPIRE
 
-  #endif // LCD_PROGRESS_BAR
+  #endif // BASIC_PROGRESS_BAR
 
   #if HAS_LCD_MENU
     if (use_click()) {
@@ -1353,6 +1355,7 @@ void MarlinUI::update() {
   /**
    * Reset the status message
    */
+
   void MarlinUI::reset_status(const bool no_welcome) {
     #if SERVICE_INTERVAL_1 > 0
       static PGMSTR(service1, "> " SERVICE_NAME_1 "!");
@@ -1438,17 +1441,17 @@ void MarlinUI::update() {
 
   void MarlinUI::finish_status(const bool persist) {
 
-    #if HAS_SPI_LCD
+    #if HAS_WIRED_LCD
 
-      #if !(ENABLED(LCD_PROGRESS_BAR) && (PROGRESS_MSG_EXPIRE) > 0)
+      #if !(BASIC_PROGRESS_BAR && (PROGRESS_MSG_EXPIRE) > 0)
         UNUSED(persist);
       #endif
 
       #if ENABLED(LCD_PROGRESS_BAR) || BOTH(FILAMENT_LCD_DISPLAY, SDSUPPORT)
         const millis_t ms = millis();
       #endif
 
-      #if ENABLED(LCD_PROGRESS_BAR)
+      #if BASIC_PROGRESS_BAR
         progress_bar_ms = ms;
         #if PROGRESS_MSG_EXPIRE > 0
           expire_status_ms = persist ? 0 : ms + PROGRESS_MSG_EXPIRE;
@@ -1462,7 +1465,7 @@ void MarlinUI::update() {
       #if ENABLED(STATUS_MESSAGE_SCROLLING)
         status_scroll_offset = 0;
       #endif
-    #else // HAS_SPI_LCD
+    #else // HAS_WIRED_LCD
       UNUSED(persist);
     #endif
 

Marlin/src/lcd/marlinui.h

@@ -56,6 +56,8 @@
   #include "../module/motion.h" // for active_extruder
 #endif
 
+#define START_OF_UTF8_CHAR(C) (((C) & 0xC0u) != 0x80U)
+
 #if HAS_WIRED_LCD
 
   enum LCDViewAction : uint8_t {