✨ D576 Buffer Monitoring (MarlinFirmware#19674)

Author: chendo

Marlin/Configuration_adv.h

@@ -4172,6 +4172,14 @@
 // Enable Marlin dev mode which adds some special commands
 //#define MARLIN_DEV_MODE
 
+#if ENABLED(MARLIN_DEV_MODE)
+  /**
+   * D576 - Buffer Monitoring
+   * To help diagnose print quality issues stemming from empty command buffers.
+   */
+  //#define BUFFER_MONITORING
+#endif
+
 /**
  * Postmortem Debugging captures misbehavior and outputs the CPU status and backtrace to serial.
  * When running in the debugger it will break for debugging. This is useful to help understand

Marlin/src/MarlinCore.cpp

@@ -868,6 +868,7 @@ void idle(bool no_stepper_sleep/*=false*/) {
       TERN_(AUTO_REPORT_TEMPERATURES, thermalManager.auto_reporter.tick());
       TERN_(AUTO_REPORT_SD_STATUS, card.auto_reporter.tick());
       TERN_(AUTO_REPORT_POSITION, position_auto_reporter.tick());
+      TERN_(BUFFER_MONITORING, queue.auto_report_buffer_statistics());
     }
   #endif
 

Marlin/src/gcode/gcode.h

@@ -242,6 +242,7 @@
  * M553 - Get or set IP netmask. (Requires enabled Ethernet port)
  * M554 - Get or set IP gateway. (Requires enabled Ethernet port)
  * M569 - Enable stealthChop on an axis. (Requires at least one _DRIVER_TYPE to be TMC2130/2160/2208/2209/5130/5160)
+ * M575 - Change the serial baud rate. (Requires BAUD_RATE_GCODE)
  * M600 - Pause for filament change: "M600 X<pos> Y<pos> Z<raise> E<first_retract> L<later_retract>". (Requires ADVANCED_PAUSE_FEATURE)
  * M603 - Configure filament change: "M603 T<tool> U<unload_length> L<load_length>". (Requires ADVANCED_PAUSE_FEATURE)
  * M605 - Set Dual X-Carriage movement mode: "M605 S<mode> [X<x_offset>] [R<temp_offset>]". (Requires DUAL_X_CARRIAGE)
@@ -298,6 +299,7 @@
  * M997 - Perform in-application firmware update
  * M999 - Restart after being stopped by error
  * D... - Custom Development G-code. Add hooks to 'gcode_D.cpp' for developers to test features. (Requires MARLIN_DEV_MODE)
+ *        D576 - Set buffer monitoring options. (Requires BUFFER_MONITORING)
  *
  * "T" Codes
  *