From 66898849103c315e254350c59d64df378d771392 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Sat, 17 Mar 2018 02:40:20 -0500
Subject: [PATCH] Easier override of ST7920 LCD timing

---
 Marlin/src/pins/pins_ANET_10.h          | 12 +++++++++---
 Marlin/src/pins/pins_MELZI_CREALITY.h   | 12 +++++++++---
 Marlin/src/pins/pins_MELZI_MALYAN.h     | 12 +++++++++---
 Marlin/src/pins/pins_MELZI_TRONXY.h     | 12 +++++++++---
 Marlin/src/pins/pins_PRINTRBOARD_REVF.h | 12 +++++++++---
 5 files changed, 45 insertions(+), 15 deletions(-)

diff --git a/Marlin/src/pins/pins_ANET_10.h b/Marlin/src/pins/pins_ANET_10.h
index c13236a7c..2ab92a3d9 100644
--- a/Marlin/src/pins/pins_ANET_10.h
+++ b/Marlin/src/pins/pins_ANET_10.h
@@ -176,9 +176,15 @@
     #define BTN_EN1          11
     #define BTN_EN2          10
     #define BTN_ENC          16
-    #define ST7920_DELAY_1 DELAY_0_NOP
-    #define ST7920_DELAY_2 DELAY_1_NOP
-    #define ST7920_DELAY_3 DELAY_2_NOP
+    #ifndef ST7920_DELAY_1
+      #define ST7920_DELAY_1 DELAY_0_NOP
+    #endif
+    #ifndef ST7920_DELAY_2
+      #define ST7920_DELAY_2 DELAY_1_NOP
+    #endif
+    #ifndef ST7920_DELAY_3
+      #define ST7920_DELAY_3 DELAY_2_NOP
+    #endif
     #define STD_ENCODER_PULSES_PER_STEP 4
     #define STD_ENCODER_STEPS_PER_MENU_ITEM 1
   #endif
diff --git a/Marlin/src/pins/pins_MELZI_CREALITY.h b/Marlin/src/pins/pins_MELZI_CREALITY.h
index 9f742f9ee..da8ca1549 100644
--- a/Marlin/src/pins/pins_MELZI_CREALITY.h
+++ b/Marlin/src/pins/pins_MELZI_CREALITY.h
@@ -54,9 +54,15 @@
 #define FIL_RUNOUT_PIN     -1 // Uses Beeper/LED Pin Pulled to GND
 
 // Alter timing for graphical display
-#define ST7920_DELAY_1 DELAY_2_NOP
-#define ST7920_DELAY_2 DELAY_2_NOP
-#define ST7920_DELAY_3 DELAY_2_NOP
+#ifndef ST7920_DELAY_1
+  #define ST7920_DELAY_1 DELAY_2_NOP
+#endif
+#ifndef ST7920_DELAY_2
+  #define ST7920_DELAY_2 DELAY_2_NOP
+#endif
+#ifndef ST7920_DELAY_3
+  #define ST7920_DELAY_3 DELAY_2_NOP
+#endif
 
 #if ENABLED(MINIPANEL)
   #undef DOGLCD_CS
diff --git a/Marlin/src/pins/pins_MELZI_MALYAN.h b/Marlin/src/pins/pins_MELZI_MALYAN.h
index f2cb63b7c..b11160f8e 100644
--- a/Marlin/src/pins/pins_MELZI_MALYAN.h
+++ b/Marlin/src/pins/pins_MELZI_MALYAN.h
@@ -43,6 +43,12 @@
 #define BTN_ENC         28
 
 // Alter timing for graphical display
-#define ST7920_DELAY_1 DELAY_2_NOP
-#define ST7920_DELAY_2 DELAY_2_NOP
-#define ST7920_DELAY_3 DELAY_2_NOP
+#ifndef ST7920_DELAY_1
+  #define ST7920_DELAY_1 DELAY_2_NOP
+#endif
+#ifndef ST7920_DELAY_2
+  #define ST7920_DELAY_2 DELAY_2_NOP
+#endif
+#ifndef ST7920_DELAY_3
+  #define ST7920_DELAY_3 DELAY_2_NOP
+#endif
diff --git a/Marlin/src/pins/pins_MELZI_TRONXY.h b/Marlin/src/pins/pins_MELZI_TRONXY.h
index c4741d1a5..7c66c50c6 100644
--- a/Marlin/src/pins/pins_MELZI_TRONXY.h
+++ b/Marlin/src/pins/pins_MELZI_TRONXY.h
@@ -50,6 +50,12 @@
 #define BTN_EN2         11
 #define BTN_ENC         26
 
-#define ST7920_DELAY_1 DELAY_0_NOP
-#define ST7920_DELAY_2 DELAY_2_NOP
-#define ST7920_DELAY_3 DELAY_0_NOP
+#ifndef ST7920_DELAY_1
+  #define ST7920_DELAY_1 DELAY_0_NOP
+#endif
+#ifndef ST7920_DELAY_2
+  #define ST7920_DELAY_2 DELAY_2_NOP
+#endif
+#ifndef ST7920_DELAY_3
+  #define ST7920_DELAY_3 DELAY_0_NOP
+#endif
diff --git a/Marlin/src/pins/pins_PRINTRBOARD_REVF.h b/Marlin/src/pins/pins_PRINTRBOARD_REVF.h
index 63b06bd67..48cf0fb2f 100644
--- a/Marlin/src/pins/pins_PRINTRBOARD_REVF.h
+++ b/Marlin/src/pins/pins_PRINTRBOARD_REVF.h
@@ -243,9 +243,15 @@
     //#define MISO         23  //        13               B3                ICSP-06             EXP2-05
 
     // increase delays
-    #define ST7920_DELAY_1 DELAY_5_NOP
-    #define ST7920_DELAY_2 DELAY_5_NOP
-    #define ST7920_DELAY_3 DELAY_5_NOP
+    #ifndef ST7920_DELAY_1
+      #define ST7920_DELAY_1 DELAY_5_NOP
+    #endif
+    #ifndef ST7920_DELAY_2
+      #define ST7920_DELAY_2 DELAY_5_NOP
+    #endif
+    #ifndef ST7920_DELAY_3
+      #define ST7920_DELAY_3 DELAY_5_NOP
+    #endif
 
   #else