Merge pull request #2807 from leptun/MK3_Polling

M220 M221 polling of values

Firmware/Marlin_main.cpp

@@ -7300,17 +7300,26 @@ Sigma_Exit:
     */
     case 220: // M220 S<factor in percent>- set speed factor override percentage
     {
-      if (code_seen('B')) //backup current speed factor
-      {
-        saved_feedmultiply_mm = feedmultiply;
-      }
-      if(code_seen('S'))
-      {		
-        feedmultiply = code_value() ;
-      }
-      if (code_seen('R')) { //restore previous feedmultiply
-        feedmultiply = saved_feedmultiply_mm;
-      }
+        bool codesWereSeen = false;
+        if (code_seen('B')) //backup current speed factor
+        {
+            saved_feedmultiply_mm = feedmultiply;
+            codesWereSeen = true;
+        }
+        if (code_seen('S'))
+        {
+            feedmultiply = code_value();
+            codesWereSeen = true;
+        }
+        if (code_seen('R')) //restore previous feedmultiply
+        {
+            feedmultiply = saved_feedmultiply_mm;
+            codesWereSeen = true;
+        }
+        if (!codesWereSeen)
+        {
+            printf_P(PSTR("%i%%\n"), feedmultiply);
+        }
     }
     break;
 
@@ -7326,23 +7335,26 @@ Sigma_Exit:
     */
     case 221: // M221 S<factor in percent>- set extrude factor override percentage
     {
-      if(code_seen('S'))
-      {
-        int tmp_code = code_value();
-        if (code_seen('T'))
+        if (code_seen('S'))
         {
-          uint8_t extruder;
-          if(setTargetedHotend(221, extruder)){
-            break;
-          }
-          extruder_multiply[extruder] = tmp_code;
+            int tmp_code = code_value();
+            if (code_seen('T'))
+            {
+                uint8_t extruder;
+                if (setTargetedHotend(221, extruder))
+                    break;
+                extruder_multiply[extruder] = tmp_code;
+            }
+            else
+            {
+                extrudemultiply = tmp_code ;
+            }
         }
         else
         {
-          extrudemultiply = tmp_code ;
+            printf_P(PSTR("%i%%\n"), extrudemultiply);
         }
-      }
-      calculate_extruder_multipliers();
+        calculate_extruder_multipliers();
     }
     break;