Make LCD_CONTRAST_MAX >= _LCD_CONTRAST_INIT (#15046)

5 years ago · 1461ee4d36
1 changed files with 3 additions and 1 deletions
--- a/Marlin/src/inc/Conditionals_post.h
+++ b/Marlin/src/inc/Conditionals_post.h
@ -292,8 +292,10 @@
  #ifndef LCD_CONTRAST_MAX
    #ifdef _LCD_CONTRAST_MAX
      #define LCD_CONTRAST_MAX _LCD_CONTRAST_MAX
+    #elif _LCD_CONTRAST_INIT > 63
+      #define LCD_CONTRAST_MAX _LCD_CONTRAST_INIT
    #else
-      #define LCD_CONTRAST_MAX 63
+      #define LCD_CONTRAST_MAX 63   // ST7567 6-bits contrast
    #endif
  #endif
  #ifndef DEFAULT_LCD_CONTRAST