[2.0.x] Add CR-10 stock display support for Re-Arm (EXP3) (#11068)

Marlin/src/pins/pins_RAMPS_RE_ARM.h

@@ -257,6 +257,25 @@
 
 #if ENABLED(ULTRA_LCD)
 
+  #if ENABLED(CR10_STOCKDISPLAY)
+
+    // Re-Arm can support Creality stock display without SD card reader and single cable on EXP3.
+    // Re-Arm J3 pins 1 (p1.31) & 2 (P3.26) are not used. Stock cable will need to have one
+    // 10-pin IDC connector trimmed or replaced with a 12-pin IDC connector to fit J3.
+    // Requires REVERSE_ENCODER_DIRECTION in Configuration.h
+
+    #define BEEPER_PIN          P2_11   // J3-3 & AUX-4
+
+    #define BTN_EN1             P0_16   // J3-7 & AUX-4
+    #define BTN_EN2             P1_23   // J3-5 & AUX-4
+    #define BTN_ENC             P3_25   // J3-4 & AUX-4
+
+    #define LCD_PINS_RS         P0_15   // J3-9 & AUX-4 (CS)
+    #define LCD_PINS_ENABLE     P0_18   // J3-10 & AUX-3 (SID, MOSI)
+    #define LCD_PINS_D4         P2_06   // J3-8 & AUX-3 (SCK, CLK)
+
+  #else
+
     #define BEEPER_PIN          P1_30   // (37) not 5V tolerant
 
     #define BTN_EN1             P3_26   // (31) J3-2 & AUX-4
@@ -337,6 +356,8 @@
       //#define LCD_SCREEN_ROT_270
     #endif
 
+  #endif
+
 #endif // ULTRA_LCD
 
 //