Fix build issues with REPRAPWORLD_KEYPAD (#17038)

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

Marlin/src/lcd/ultralcd.cpp

 
     void _reprapworld_keypad_move(const AxisEnum axis, const int16_t dir) {
       move_menu_scale = REPRAPWORLD_KEYPAD_MOVE_STEP;
-      encoderPosition = dir;
+      ui.encoderPosition = dir;
       switch (axis) {
         case X_AXIS: lcd_move_x(); break;
         case Y_AXIS: lcd_move_y(); break;
 
 #if HAS_ENCODER_ACTION
 
-  #if DISABLED(ADC_KEYPAD) && (ENABLED(REPRAPWORLD_KEYPAD) || !HAS_DIGITAL_BUTTONS)
-
-    /**
-     * Setup Rotary Encoder Bit Values (for two pin encoders to indicate movement)
-     * These values are independent of which pins are used for EN_A and EN_B indications
-     * The rotary encoder part is also independent to the chipset used for the LCD
-     */
-    #define GET_SHIFT_BUTTON_STATES(DST) \
-      uint8_t new_##DST = 0; \
-      WRITE(SHIFT_LD, LOW); \
-      WRITE(SHIFT_LD, HIGH); \
-      for (int8_t i = 0; i < 8; i++) { \
-        new_##DST >>= 1; \
-        if (READ(SHIFT_OUT)) SBI(new_##DST, 7); \
-        WRITE(SHIFT_CLK, HIGH); \
-        WRITE(SHIFT_CLK, LOW); \
-      } \
-      DST = ~new_##DST; //invert it, because a pressed switch produces a logical 0
-
-  #endif
-
   /**
    * Read encoder buttons from the hardware registers
    * Warning: This function is called from interrupt context!
         }
       #endif
 
-      #if HAS_SHIFT_ENCODER
-
-        GET_SHIFT_BUTTON_STATES((
-          #if ENABLED(REPRAPWORLD_KEYPAD)
-            keypad_buttons
-          #else
-            buttons
-          #endif
-        ));
-
+      #if HAS_SHIFT_ENCODER      
+        /**
+         * Set up Rotary Encoder bit values (for two pin encoders to indicate movement).
+         * These values are independent of which pins are used for EN_A / EN_B indications.
+         * The rotary encoder part is also independent of the LCD chipset.
+         */
+        uint8_t val = 0;
+        WRITE(SHIFT_LD, LOW);
+        WRITE(SHIFT_LD, HIGH);
+        LOOP_L_N(i, 8) {
+          val >>= 1;
+          if (READ(SHIFT_OUT)) SBI(val, 7);
+          WRITE(SHIFT_CLK, HIGH);
+          WRITE(SHIFT_CLK, LOW);
+        }
+        #if ENABLED(REPRAPWORLD_KEYPAD)
+          keypad_buttons = ~val;
+        #else
+          buttons = ~val;
+        #endif
       #endif
 
     } // next_button_update_ms

Marlin/src/pins/ramps/pins_RAMPS.h

           #define NEOPIXEL_PIN    25
         #endif
 
-    #endif
+      #endif
 
     #elif ENABLED(MINIPANEL)
 
       #define BEEPER_PIN        33
 
       // Buttons are directly attached to AUX-2
-      #if ENABLED(REPRAPWORLD_KEYPAD)
-        #define SHIFT_OUT       40
-        #define SHIFT_CLK       44
-        #define SHIFT_LD        42
-        #define BTN_EN1         64
-        #define BTN_EN2         59
-        #define BTN_ENC         63
-      #elif ENABLED(PANEL_ONE)
+      #if ENABLED(PANEL_ONE)
         #define BTN_EN1         59   // AUX2 PIN 3
         #define BTN_EN2         63   // AUX2 PIN 4
         #define BTN_ENC         49   // AUX3 PIN 7
   #endif // NEWPANEL
 
 #endif // HAS_SPI_LCD
+
+#if ENABLED(REPRAPWORLD_KEYPAD)
+  #define SHIFT_OUT        40
+  #define SHIFT_CLK        44
+  #define SHIFT_LD         42
+  #ifndef BTN_EN1
+    #define BTN_EN1        64
+  #endif
+  #ifndef BTN_EN2
+    #define BTN_EN2        59
+  #endif
+  #ifndef BTN_ENC
+    #define BTN_ENC        63
+  #endif
+#endif

buildroot/share/tests/megaatmega2560-tests

 # Test DUAL_X_CARRIAGE
 #
 restore_configs
-opt_set MOTHERBOARD BOARD_RUMBA
+opt_set MOTHERBOARD BOARD_TT_OSCAR
 opt_set LCD_LANGUAGE pt
 opt_set EXTRUDERS 2
 opt_set TEMP_SENSOR_1 1
 opt_enable USE_XMAX_PLUG DUAL_X_CARRIAGE
-exec_test $1 $2 "Rumba | DUAL_X_CARRIAGE"
+opt_enable REPRAPWORLD_KEYPAD
+opt_set REPRAPWORLD_KEYPAD_MOVE_STEP 10.0
+exec_test $1 $2 "TT Oscar | DUAL_X_CARRIAGE"
 
 #
 # Test SPEAKER with BOARD_BQ_ZUM_MEGA_3D and BQ_LCD_SMART_CONTROLLER