🔪 Options to slim M111, remove M115 (MarlinFirmware#26603)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/Configuration_adv.h

@@ -3935,6 +3935,18 @@
 
 //#define REPETIER_GCODE_M360     // Add commands originally from Repetier FW
 
+/**
+ * Enable M111 debug flags 1=ECHO, 2=INFO, 4=ERRORS (unimplemented).
+ * Disable to save some flash. Some hosts (Repetier Host) may rely on this feature.
+ */
+#define DEBUG_FLAGS_GCODE
+
+/**
+ * M115 - Report capabilites. Disable to save ~1150 bytes of flash.
+ *        Some hosts (and serial TFT displays) rely on this feature.
+ */
+#define REPORT_CAPABILITIES_GCODE
+
 /**
  * Enable this option for a leaner build of Marlin that removes
  * workspace offsets to slightly optimize performance.

Marlin/src/core/serial.h

@@ -33,19 +33,14 @@
 //
 enum MarlinDebugFlags : uint8_t {
   MARLIN_DEBUG_NONE          = 0,
-  MARLIN_DEBUG_ECHO          = _BV(0), ///< Echo commands in order as they are processed
-  MARLIN_DEBUG_INFO          = _BV(1), ///< Print messages for code that has debug output
-  MARLIN_DEBUG_ERRORS        = _BV(2), ///< Not implemented
-  MARLIN_DEBUG_DRYRUN        = _BV(3), ///< Ignore temperature setting and E movement commands
-  MARLIN_DEBUG_COMMUNICATION = _BV(4), ///< Not implemented
-  #if ENABLED(DEBUG_LEVELING_FEATURE)
-    MARLIN_DEBUG_LEVELING    = _BV(5), ///< Print detailed output for homing and leveling
-    MARLIN_DEBUG_MESH_ADJUST = _BV(6), ///< UBL bed leveling
-  #else
-    MARLIN_DEBUG_LEVELING    = 0,
-    MARLIN_DEBUG_MESH_ADJUST = 0,
-  #endif
-  MARLIN_DEBUG_ALL           = 0xFF
+  MARLIN_DEBUG_ECHO          = TERN0(DEBUG_FLAGS_GCODE,      _BV(0)), //!< Echo commands in order as they are processed
+  MARLIN_DEBUG_INFO          = TERN0(DEBUG_FLAGS_GCODE,      _BV(1)), //!< Print messages for code that has debug output
+  MARLIN_DEBUG_ERRORS        = TERN0(DEBUG_FLAGS_GCODE,      _BV(2)), //!< Not implemented
+  MARLIN_DEBUG_DRYRUN        =                               _BV(3),  //!< Ignore temperature setting and E movement commands
+  MARLIN_DEBUG_COMMUNICATION = TERN0(DEBUG_FLAGS_GCODE,      _BV(4)), //!< Not implemented
+  MARLIN_DEBUG_LEVELING      = TERN0(DEBUG_LEVELING_FEATURE, _BV(5)), //!< Print detailed output for homing and leveling
+  MARLIN_DEBUG_MESH_ADJUST   = TERN0(DEBUG_LEVELING_FEATURE, _BV(6)), //!< UBL bed leveling
+  MARLIN_DEBUG_ALL           = MARLIN_DEBUG_ECHO|MARLIN_DEBUG_INFO|MARLIN_DEBUG_ERRORS|MARLIN_DEBUG_COMMUNICATION|MARLIN_DEBUG_LEVELING|MARLIN_DEBUG_MESH_ADJUST
 };
 
 extern uint8_t marlin_debug_flags;

Marlin/src/gcode/control/M111.cpp

@@ -20,25 +20,33 @@
  *
  */
 
+#include "../../inc/MarlinConfig.h"
 #include "../gcode.h"
 
 /**
  * M111: Set the debug level
  */
 void GcodeSuite::M111() {
   if (parser.seenval('S')) marlin_debug_flags = parser.value_byte();
-
-  static PGMSTR(str_debug_1, STR_DEBUG_ECHO);
-  static PGMSTR(str_debug_2, STR_DEBUG_INFO);
-  static PGMSTR(str_debug_4, STR_DEBUG_ERRORS);
+  #if ENABLED(DEBUG_FLAGS_GCODE)
+    static PGMSTR(str_debug_1, STR_DEBUG_ECHO);
+    static PGMSTR(str_debug_2, STR_DEBUG_INFO);
+    static PGMSTR(str_debug_4, STR_DEBUG_ERRORS);
+  #endif
   static PGMSTR(str_debug_8, STR_DEBUG_DRYRUN);
-  static PGMSTR(str_debug_16, STR_DEBUG_COMMUNICATION);
+  #if ENABLED(DEBUG_FLAGS_GCODE)
+    static PGMSTR(str_debug_16, STR_DEBUG_COMMUNICATION);
+  #endif
   #if ENABLED(DEBUG_LEVELING_FEATURE)
     static PGMSTR(str_debug_detail, STR_DEBUG_DETAIL);
   #endif
 
   static PGM_P const debug_strings[] PROGMEM = {
-    str_debug_1, str_debug_2, str_debug_4, str_debug_8, str_debug_16,
+    TERN(DEBUG_FLAGS_GCODE, str_debug_1, nullptr),
+    TERN(DEBUG_FLAGS_GCODE, str_debug_2, nullptr),
+    TERN(DEBUG_FLAGS_GCODE, str_debug_4, nullptr),
+    str_debug_8,
+    TERN(DEBUG_FLAGS_GCODE, str_debug_16, nullptr),
     TERN_(DEBUG_LEVELING_FEATURE, str_debug_detail)
   };
 
@@ -47,31 +55,29 @@ void GcodeSuite::M111() {
   if (marlin_debug_flags) {
     uint8_t comma = 0;
     for (uint8_t i = 0; i < COUNT(debug_strings); ++i) {
-      if (TEST(marlin_debug_flags, i)) {
+      PGM_P const pstr = (PGM_P)pgm_read_ptr(&debug_strings[i]);
+      if (pstr && TEST(marlin_debug_flags, i)) {
         if (comma++) SERIAL_CHAR(',');
-        SERIAL_ECHOPGM_P((PGM_P)pgm_read_ptr(&debug_strings[i]));
+        SERIAL_ECHOPGM_P(pstr);
       }
     }
   }
   else {
     SERIAL_ECHOPGM(STR_DEBUG_OFF);
-    #if !defined(__AVR__) || !defined(USBCON)
+    #if !(defined(__AVR__) && defined(USBCON))
       #if ENABLED(SERIAL_STATS_RX_BUFFER_OVERRUNS)
         SERIAL_ECHOPGM("\nBuffer Overruns: ", MYSERIAL1.buffer_overruns());
       #endif
-
       #if ENABLED(SERIAL_STATS_RX_FRAMING_ERRORS)
         SERIAL_ECHOPGM("\nFraming Errors: ", MYSERIAL1.framing_errors());
       #endif
-
       #if ENABLED(SERIAL_STATS_DROPPED_RX)
         SERIAL_ECHOPGM("\nDropped bytes: ", MYSERIAL1.dropped());
       #endif
-
       #if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
         SERIAL_ECHOPGM("\nMax RX Queue Size: ", MYSERIAL1.rxMaxEnqueued());
       #endif
-    #endif // !__AVR__ || !USBCON
+    #endif // !(__AVR__ && USBCON)
   }
   SERIAL_EOL();
 }

Marlin/src/gcode/gcode.cpp

@@ -669,7 +669,10 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
 
       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
+
+      #if ENABLED(REPORT_CAPABILITIES_GCODE)
+        case 115: M115(); break;                                  // M115: Report capabilities
+      #endif
 
       case 117: TERN_(HAS_STATUS_MESSAGE, M117()); break;         // M117: Set LCD message text, if possible
 

Marlin/src/gcode/gcode.h

@@ -760,7 +760,10 @@ class GcodeSuite {
   #endif
 
   static void M114();
-  static void M115();
+
+  #if ENABLED(REPORT_CAPABILITIES_GCODE)
+    static void M115();
+  #endif
 
   #if HAS_STATUS_MESSAGE
     static void M117();

Marlin/src/gcode/host/M115.cpp

@@ -20,8 +20,11 @@
  *
  */
 
-#include "../gcode.h"
 #include "../../inc/MarlinConfig.h"
+
+#if ENABLED(REPORT_CAPABILITIES_GCODE)
+
+#include "../gcode.h"
 #include "../queue.h"           // for getting the command port
 
 #if ENABLED(M115_GEOMETRY_REPORT)
@@ -271,3 +274,5 @@ void GcodeSuite::M115() {
 
   #endif // EXTENDED_CAPABILITIES_REPORT
 }
+
+#endif // REPORT_CAPABILITIES_GCODE

Marlin/src/inc/Warnings.cpp

@@ -42,6 +42,14 @@
   #endif
 #endif
 
+#if DISABLED(DEBUG_FLAGS_GCODE)
+  #warning "DEBUG_FLAGS_GCODE is recommended if you have space. Some hosts rely on it."
+#endif
+
+#if DISABLED(REPORT_CAPABILITIES_GCODE)
+  #warning "REPORT_CAPABILITIES_GCODE is recommended if you have space. Some hosts rely on it."
+#endif
+
 #if ENABLED(LA_DEBUG)
   #warning "WARNING! Disable LA_DEBUG for the final build!"
 #endif

ini/features.ini

@@ -322,6 +322,7 @@ CNC_COORDINATE_SYSTEMS                 = build_src_filter=+<src/gcode/geometry/G
 HAS_HOME_OFFSET                        = build_src_filter=+<src/gcode/geometry/M206_M428.cpp>
 EXPECTED_PRINTER_CHECK                 = build_src_filter=+<src/gcode/host/M16.cpp>
 HOST_KEEPALIVE_FEATURE                 = build_src_filter=+<src/gcode/host/M113.cpp>
+REPORT_CAPABILITIES_GCODE              = build_src_filter=+<src/gcode/host/M115.cpp>
 AUTO_REPORT_POSITION                   = build_src_filter=+<src/gcode/host/M154.cpp>
 REPETIER_GCODE_M360                    = build_src_filter=+<src/gcode/host/M360.cpp>
 HAS_GCODE_M876                         = build_src_filter=+<src/gcode/host/M876.cpp>

platformio.ini

@@ -111,7 +111,6 @@ default_src_filter = +<src/*> -<src/config> -<src/tests>
   +<src/gcode/geometry/G92.cpp>
   +<src/gcode/host/M110.cpp>
   +<src/gcode/host/M114.cpp>
-  +<src/gcode/host/M115.cpp>
   +<src/gcode/host/M118.cpp>
   +<src/gcode/host/M119.cpp>
   +<src/gcode/motion/G0_G1.cpp>