Assisted tramming can handle up to 9 points.

Marlin/Configuration_adv.h

@@ -1034,7 +1034,7 @@
 //#define ASSISTED_TRAMMING
 #if ENABLED(ASSISTED_TRAMMING)
 
-  // Define positions for probe points.
+  // Define from 3 to 9 points to probe.
   #define TRAMMING_POINT_XY { {  20, 20 }, { 180,  20 }, { 180, 180 }, { 20, 180 } }
 
   // Define position names for probe points.

Marlin/src/core/macros.h

@@ -717,6 +717,19 @@
 #define RREPEAT2_S(S,N,OP,V...)  EVAL1024(_RREPEAT2(S,SUB##S(N),OP,V))
 #define RREPEAT2(N,OP,V...)      RREPEAT2_S(0,N,OP,V)
 
+// Emit a list of N OP(I) items with ascending counter.
+#define _REPLIST(_RPT_I,_RPT_N,_RPT_OP)                          \
+  _RPT_OP(_RPT_I)                                                \
+  IF_ELSE(SUB1(_RPT_N))                                          \
+    ( , DEFER2(__REPLIST)()(ADD1(_RPT_I),SUB1(_RPT_N),_RPT_OP) ) \
+    ( /* Do nothing */ )
+#define __REPLIST() _REPLIST
+
+// Repeat a macro, comma-separated, passing S...N-1.
+#define REPLIST_S(S,N,OP)       EVAL(_REPLIST(S,SUB##S(N),OP))
+#define REPLIST(N,OP)           REPLIST_S(0,N,OP)
+#define REPLIST_1(N,OP)         REPLIST_S(1,INCREMENT(N),OP)
+
 // Call OP(A) with each item as an argument
 #define _MAP(_MAP_OP,A,V...)       \
   _MAP_OP(A)                       \

Marlin/src/feature/tramming.cpp

@@ -29,31 +29,11 @@
 #define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
 #include "../core/debug_out.h"
 
-PGMSTR(point_name_1, TRAMMING_POINT_NAME_1);
-PGMSTR(point_name_2, TRAMMING_POINT_NAME_2);
-PGMSTR(point_name_3, TRAMMING_POINT_NAME_3);
-#ifdef TRAMMING_POINT_NAME_4
-  PGMSTR(point_name_4, TRAMMING_POINT_NAME_4);
-  #ifdef TRAMMING_POINT_NAME_5
-    PGMSTR(point_name_5, TRAMMING_POINT_NAME_5);
-    #ifdef TRAMMING_POINT_NAME_6
-      PGMSTR(point_name_6, TRAMMING_POINT_NAME_6);
-    #endif
-  #endif
-#endif
+#define _TRAM_NAME_DEF(N) PGMSTR(point_name_##N, TRAMMING_POINT_NAME_##N);
+#define _TRAM_NAME_ITEM(N) point_name_##N
+REPEAT_1(_NR_TRAM_NAMES, _TRAM_NAME_DEF)
 
-PGM_P const tramming_point_name[] PROGMEM = {
-  point_name_1, point_name_2, point_name_3
-  #ifdef TRAMMING_POINT_NAME_4
-    , point_name_4
-    #ifdef TRAMMING_POINT_NAME_5
-      , point_name_5
-      #ifdef TRAMMING_POINT_NAME_6
-        , point_name_6
-      #endif
-    #endif
-  #endif
-};
+PGM_P const tramming_point_name[] PROGMEM = { REPLIST_1(_NR_TRAM_NAMES, _TRAM_NAME_ITEM) };
 
 #ifdef ASSISTED_TRAMMING_WAIT_POSITION
 

Marlin/src/feature/tramming.h

@@ -31,43 +31,34 @@
 constexpr xy_pos_t tramming_points[] = TRAMMING_POINT_XY;
 
 #define G35_PROBE_COUNT COUNT(tramming_points)
-static_assert(WITHIN(G35_PROBE_COUNT, 3, 6), "TRAMMING_POINT_XY requires between 3 and 6 XY positions.");
+static_assert(WITHIN(G35_PROBE_COUNT, 3, 9), "TRAMMING_POINT_XY requires between 3 and 9 XY positions.");
 
-#define VALIDATE_TRAMMING_POINT(N) static_assert(N >= G35_PROBE_COUNT || Probe::build_time::can_reach(tramming_points[N]), \
-  "TRAMMING_POINT_XY point " STRINGIFY(N) " is not reachable with the default NOZZLE_TO_PROBE offset and PROBING_MARGIN.")
-VALIDATE_TRAMMING_POINT(0); VALIDATE_TRAMMING_POINT(1); VALIDATE_TRAMMING_POINT(2); VALIDATE_TRAMMING_POINT(3); VALIDATE_TRAMMING_POINT(4); VALIDATE_TRAMMING_POINT(5);
-
-extern const char point_name_1[], point_name_2[], point_name_3[]
-  #ifdef TRAMMING_POINT_NAME_4
-    , point_name_4[]
-    #ifdef TRAMMING_POINT_NAME_5
-      , point_name_5[]
-      #ifdef TRAMMING_POINT_NAME_6
-        , point_name_6[]
-      #endif
-    #endif
-  #endif
-;
-
-#define _NR_TRAM_NAMES 2
-#ifdef TRAMMING_POINT_NAME_3
-  #undef _NR_TRAM_NAMES
+#ifdef TRAMMING_POINT_NAME_9
+  #define _NR_TRAM_NAMES 9
+#elif defined(TRAMMING_POINT_NAME_8)
+  #define _NR_TRAM_NAMES 8
+#elif defined(TRAMMING_POINT_NAME_7)
+  #define _NR_TRAM_NAMES 7
+#elif defined(TRAMMING_POINT_NAME_6)
+  #define _NR_TRAM_NAMES 6
+#elif defined(TRAMMING_POINT_NAME_5)
+  #define _NR_TRAM_NAMES 5
+#elif defined(TRAMMING_POINT_NAME_4)
+  #define _NR_TRAM_NAMES 4
+#elif defined(TRAMMING_POINT_NAME_3)
   #define _NR_TRAM_NAMES 3
-  #ifdef TRAMMING_POINT_NAME_4
-    #undef _NR_TRAM_NAMES
-    #define _NR_TRAM_NAMES 4
-    #ifdef TRAMMING_POINT_NAME_5
-      #undef _NR_TRAM_NAMES
-      #define _NR_TRAM_NAMES 5
-      #ifdef TRAMMING_POINT_NAME_6
-        #undef _NR_TRAM_NAMES
-        #define _NR_TRAM_NAMES 6
-      #endif
-    #endif
-  #endif
+#else
+  #define _NR_TRAM_NAMES 0
 #endif
+
 static_assert(_NR_TRAM_NAMES >= G35_PROBE_COUNT, "Define enough TRAMMING_POINT_NAME_s for all TRAMMING_POINT_XY entries.");
-#undef _NR_TRAM_NAMES
+
+#define _TRAM_NAME_PTR(N) point_name_##N[]
+extern const char REPLIST_1(_NR_TRAM_NAMES, _TRAM_NAME_PTR);
+
+#define _CHECK_TRAM_POINT(N) static_assert(Probe::build_time::can_reach(tramming_points[N]), "TRAMMING_POINT_XY point " STRINGIFY(N) " is not reachable with the default NOZZLE_TO_PROBE offset and PROBING_MARGIN.");
+REPEAT(_NR_TRAM_NAMES, _CHECK_TRAM_POINT)
+#undef _CHECK_TRAM_POINT
 
 extern PGM_P const tramming_point_name[];
 

buildroot/tests/DUE

@@ -12,7 +12,8 @@ opt_set MOTHERBOARD BOARD_RAMPS4DUE_EFB \
         TEMP_SENSOR_0 -2 TEMP_SENSOR_BED 2 \
         GRID_MAX_POINTS_X 16 \
         E0_AUTO_FAN_PIN 8 FANMUX0_PIN 53 EXTRUDER_AUTO_FAN_SPEED 100 \
-        TEMP_SENSOR_CHAMBER 3 TEMP_CHAMBER_PIN 6 HEATER_CHAMBER_PIN 45
+        TEMP_SENSOR_CHAMBER 3 TEMP_CHAMBER_PIN 6 HEATER_CHAMBER_PIN 45 \
+        TRAMMING_POINT_XY '{{20,20},{20,20},{20,20},{20,20},{20,20}}' TRAMMING_POINT_NAME_5 '"Point 5"'
 opt_enable S_CURVE_ACCELERATION EEPROM_SETTINGS GCODE_MACROS \
            FIX_MOUNTED_PROBE Z_SAFE_HOMING CODEPENDENT_XY_HOMING \
            ASSISTED_TRAMMING REPORT_TRAMMING_MM ASSISTED_TRAMMING_WAIT_POSITION \