Fix E3V2 DWIN Jerk Menu (#20352)

* Fix E3V2 DWIN build without CLASSIC_JERK
* Fix jerk edits applying to wrong index

Marlin/src/lcd/dwin/e3v2/dwin.cpp

@@ -185,7 +185,10 @@ bool dwin_abort_flag = false; // Flag to reset feedrate, return to Home
 
 constexpr float default_max_feedrate[]        = DEFAULT_MAX_FEEDRATE;
 constexpr float default_max_acceleration[]    = DEFAULT_MAX_ACCELERATION;
+
+#if HAS_CLASSIC_JERK
   constexpr float default_max_jerk[]          = { DEFAULT_XJERK, DEFAULT_YJERK, DEFAULT_ZJERK, DEFAULT_EJERK };
+#endif
 
 uint8_t Percentrecord = 0;
 uint16_t remain_time = 0;
@@ -1492,8 +1495,8 @@ void HMI_MaxAccelerationXYZE() {
       if (Apply_Encoder(encoder_diffState, HMI_ValueStruct.Max_Jerk)) {
         checkkey = MaxJerk;
         EncoderRate.enabled = false;
-        if (WITHIN(HMI_flag.step_axis, X_AXIS, E_AXIS))
-          planner.set_max_jerk(HMI_flag.step_axis, HMI_ValueStruct.Max_Jerk / 10);
+        if (WITHIN(HMI_flag.jerk_axis, X_AXIS, E_AXIS))
+          planner.set_max_jerk(HMI_flag.jerk_axis, HMI_ValueStruct.Max_Jerk / 10);
         DWIN_Draw_FloatValue(true, true, 0, font8x16, Color_White, Color_Bg_Black, 3, 1, 210, MBASE(select_jerk.now), HMI_ValueStruct.Max_Jerk);
         return;
       }
@@ -2955,6 +2958,7 @@ inline void Draw_Max_Accel_Menu() {
   #endif
 }
 
+#if HAS_CLASSIC_JERK
   inline void Draw_Max_Jerk_Menu() {
     Clear_Main_Window();
 
@@ -3024,6 +3028,7 @@ inline void Draw_Max_Jerk_Menu() {
       DWIN_Draw_FloatValue(true, true, 0, font8x16, Color_White, Color_Bg_Black, 3, 1, 210, MBASE(4), planner.max_jerk[E_AXIS] * MINUNITMULT);
     #endif
   }
+#endif
 
 inline void Draw_Steps_Menu() {
   Clear_Main_Window();
@@ -3636,7 +3641,9 @@ void DWIN_HandleScreen() {
     #endif
     case MaxSpeed:        HMI_MaxSpeed(); break;
     case MaxAcceleration: HMI_MaxAcceleration(); break;
+    #if HAS_CLASSIC_JERK
       case MaxJerk:       HMI_MaxJerk(); break;
+    #endif
     case Step:            HMI_Step(); break;
     case Move_X:          HMI_Move_X(); break;
     case Move_Y:          HMI_Move_Y(); break;
@@ -3657,7 +3664,9 @@ void DWIN_HandleScreen() {
     case PrintSpeed:      HMI_PrintSpeed(); break;
     case MaxSpeed_value:  HMI_MaxFeedspeedXYZE(); break;
     case MaxAcceleration_value: HMI_MaxAccelerationXYZE(); break;
+    #if HAS_CLASSIC_JERK
       case MaxJerk_value: HMI_MaxJerkXYZE(); break;
+    #endif
     case Step_value:      HMI_StepXYZE(); break;
     default: break;
   }

buildroot/tests/STM32F103RET6_creality-tests

@@ -13,4 +13,8 @@ use_example_configs "Creality/Ender-3 V2"
 opt_enable MARLIN_DEV_MODE
 exec_test $1 $2 "Ender 3 v2" "$3"
 
+use_example_configs "Creality/Ender-3 V2"
+opt_disable CLASSIC_JERK
+exec_test $1 $2 "Ender 3 v2 w/o CLASSIC_JERK" "$3"
+
 restore_configs