Proper implementation of PID menu items

- Make this work per #1344

Marlin/ultralcd.cpp

@@ -41,11 +41,6 @@ char lcd_status_message[LCD_WIDTH+1] = WELCOME_MSG;
 #include "ultralcd_implementation_hitachi_HD44780.h"
 #endif
 
-/** forward declarations **/
-
-void copy_and_scalePID_i();
-void copy_and_scalePID_d();
-
 /* Different menus */
 static void lcd_status_screen();
 #ifdef ULTIPANEL
@@ -185,9 +180,8 @@ void* editValue;
 int32_t minEditValue, maxEditValue;
 menuFunc_t callbackFunc;
 
-// place-holders for Ki and Kd edits, and the extruder # being edited
+// place-holders for Ki and Kd edits
 float raw_Ki, raw_Kd;
-int pid_current_extruder;
 
 static void lcd_goto_menu(menuFunc_t menu, const uint32_t encoder=0, const bool feedback=true) {
   if (currentMenu != menu) {
@@ -811,6 +805,33 @@ static void lcd_control_menu()
     END_MENU();
 }
 
+#ifdef PIDTEMP
+  // Helpers for editing PID Ki & Kd values
+  // grab the PID value out of the temp variable; scale it; then update the PID driver
+  void copy_and_scalePID_i(int e) {
+    PID_PARAM(Ki, e) = scalePID_i(raw_Ki);
+    updatePID();
+  }
+  void copy_and_scalePID_d(int e) {
+    PID_PARAM(Kd, e) = scalePID_d(raw_Kd);
+    updatePID();
+  }
+  void copy_and_scalePID_i_E1() { copy_and_scalePID_i(0); }
+  void copy_and_scalePID_d_E1() { copy_and_scalePID_d(0); }
+  #if EXTRUDERS > 1
+    void copy_and_scalePID_i_E2() { copy_and_scalePID_i(1); }
+    void copy_and_scalePID_d_E2() { copy_and_scalePID_d(1); }
+    #if EXTRUDERS > 2
+      void copy_and_scalePID_i_E3() { copy_and_scalePID_i(2); }
+      void copy_and_scalePID_d_E3() { copy_and_scalePID_d(2); }
+      #if EXTRUDERS > 3
+        void copy_and_scalePID_i_E4() { copy_and_scalePID_i(3); }
+        void copy_and_scalePID_d_E5() { copy_and_scalePID_d(3); }
+      #endif
+    #endif
+  #endif
+#endif
+
 static void lcd_control_temperature_menu()
 {
   START_MENU();
@@ -818,15 +839,21 @@ static void lcd_control_temperature_menu()
   #if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &target_temperature[0], 0, HEATER_0_MAXTEMP - 15);
   #endif
-#if TEMP_SENSOR_1 != 0 && EXTRUDERS > 1
+  #if EXTRUDERS > 1
+    #if TEMP_SENSOR_1 != 0
       MENU_ITEM_EDIT(int3, MSG_NOZZLE " 2", &target_temperature[1], 0, HEATER_1_MAXTEMP - 15);
     #endif
-#if TEMP_SENSOR_2 != 0 && EXTRUDERS > 2
+    #if EXTRUDERS > 2
+      #if TEMP_SENSOR_2 != 0
         MENU_ITEM_EDIT(int3, MSG_NOZZLE " 3", &target_temperature[2], 0, HEATER_2_MAXTEMP - 15);
       #endif
-#if TEMP_SENSOR_3 != 0 && EXTRUDERS > 3
+      #if EXTRUDERS > 2
+        #if TEMP_SENSOR_3 != 0
           MENU_ITEM_EDIT(int3, MSG_NOZZLE " 4", &target_temperature[3], 0, HEATER_3_MAXTEMP - 15);
         #endif
+      #endif
+    #endif
+  #endif
   #if TEMP_SENSOR_BED != 0
     MENU_ITEM_EDIT(int3, MSG_BED, &target_temperature_bed, 0, BED_MAXTEMP - 15);
   #endif
@@ -839,43 +866,54 @@ static void lcd_control_temperature_menu()
   #endif
   #ifdef PIDTEMP
     // set up temp variables - undo the default scaling
-	pid_current_extruder = 0;
     raw_Ki = unscalePID_i(PID_PARAM(Ki,0));
     raw_Kd = unscalePID_d(PID_PARAM(Kd,0));
     MENU_ITEM_EDIT(float52, MSG_PID_P, &PID_PARAM(Kp,0), 1, 9990);
     // i is typically a small value so allows values below 1
-	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I, &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I, &raw_Ki, 0.01, 9990, copy_and_scalePID_i_E1);
-	MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D, &raw_Kd, 1, 9990, copy_and_scalePID_d);
+    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D, &raw_Kd, 1, 9990, copy_and_scalePID_d_E1);
     #ifdef PID_ADD_EXTRUSION_RATE
       MENU_ITEM_EDIT(float3, MSG_PID_C, &PID_PARAM(Kc,0), 1, 9990);
     #endif//PID_ADD_EXTRUSION_RATE
     #ifdef PID_PARAMS_PER_EXTRUDER
       #if EXTRUDERS > 1
         // set up temp variables - undo the default scaling
-	  pid_current_extruder = 0;
         raw_Ki = unscalePID_i(PID_PARAM(Ki,1));
         raw_Kd = unscalePID_d(PID_PARAM(Kd,1));
         MENU_ITEM_EDIT(float52, MSG_PID_P " E2", &PID_PARAM(Kp,1), 1, 9990);
         // i is typically a small value so allows values below 1
-	  MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I " E2", &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+        MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I " E2", &raw_Ki, 0.01, 9990, copy_and_scalePID_i_E2);
-	  MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D " E2", &raw_Kd, 1, 9990, copy_and_scalePID_d);
+        MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D " E2", &raw_Kd, 1, 9990, copy_and_scalePID_d_E2);
         #ifdef PID_ADD_EXTRUSION_RATE
           MENU_ITEM_EDIT(float3, MSG_PID_C " E2", &PID_PARAM(Kc,1), 1, 9990);
         #endif//PID_ADD_EXTRUSION_RATE
-  #endif//EXTRUDERS > 1
+
         #if EXTRUDERS > 2
           // set up temp variables - undo the default scaling
-	    pid_current_extruder = 0;
           raw_Ki = unscalePID_i(PID_PARAM(Ki,2));
           raw_Kd = unscalePID_d(PID_PARAM(Kd,2));
           MENU_ITEM_EDIT(float52, MSG_PID_P " E3", &PID_PARAM(Kp,2), 1, 9990);
           // i is typically a small value so allows values below 1
-	    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I " E3", &raw_Ki, 0.01, 9990, copy_and_scalePID_i);
+          MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I " E3", &raw_Ki, 0.01, 9990, copy_and_scalePID_i_E3);
-	    MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D " E3", &raw_Kd, 1, 9990, copy_and_scalePID_d);
+          MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D " E3", &raw_Kd, 1, 9990, copy_and_scalePID_d_E3);
           #ifdef PID_ADD_EXTRUSION_RATE
             MENU_ITEM_EDIT(float3, MSG_PID_C " E3", &PID_PARAM(Kc,2), 1, 9990);
           #endif//PID_ADD_EXTRUSION_RATE
+
+          #if EXTRUDERS > 3
+            // set up temp variables - undo the default scaling
+            raw_Ki = unscalePID_i(PID_PARAM(Ki,3));
+            raw_Kd = unscalePID_d(PID_PARAM(Kd,3));
+            MENU_ITEM_EDIT(float52, MSG_PID_P " E4", &PID_PARAM(Kp,3), 1, 9990);
+            // i is typically a small value so allows values below 1
+            MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_I " E4", &raw_Ki, 0.01, 9990, copy_and_scalePID_i_E4);
+            MENU_ITEM_EDIT_CALLBACK(float52, MSG_PID_D " E4", &raw_Kd, 1, 9990, copy_and_scalePID_d_E4);
+            #ifdef PID_ADD_EXTRUSION_RATE
+              MENU_ITEM_EDIT(float3, MSG_PID_C " E4", &PID_PARAM(Kc,3), 1, 9990);
+            #endif//PID_ADD_EXTRUSION_RATE
+          #endif//EXTRUDERS > 3
         #endif//EXTRUDERS > 2
+      #endif//EXTRUDERS > 1
     #endif //PID_PARAMS_PER_EXTRUDER
   #endif//PIDTEMP
   MENU_ITEM(submenu, MSG_PREHEAT_PLA_SETTINGS, lcd_control_temperature_preheat_pla_settings_menu);
@@ -1785,24 +1823,4 @@ char *ftostr52(const float &x)
   return conv;
 }
 
-// Callback for after editing PID i value
-// grab the PID i value out of the temp variable; scale it; then update the PID driver
-void copy_and_scalePID_i()
-{
-#ifdef PIDTEMP
-  PID_PARAM(Ki, pid_current_extruder) = scalePID_i(raw_Ki);
-  updatePID();
-#endif
-}
-
-// Callback for after editing PID d value
-// grab the PID d value out of the temp variable; scale it; then update the PID driver
-void copy_and_scalePID_d()
-{
-#ifdef PIDTEMP
-	PID_PARAM(Kd, pid_current_extruder) = scalePID_d(raw_Kd);
-  updatePID();
-#endif
-}
-
 #endif //ULTRA_LCD