From 8d5bea073b1f60d3c160c7d9a0baa5a202cad6c1 Mon Sep 17 00:00:00 2001
From: Roxy-3D <Roxy-3D@users.noreply.github.com>
Date: Wed, 5 Sep 2018 14:18:13 -0500
Subject: [PATCH] Assume one Max7219 unit if not specified

---
 Marlin/src/feature/Max7219_Debug_LEDs.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Marlin/src/feature/Max7219_Debug_LEDs.h b/Marlin/src/feature/Max7219_Debug_LEDs.h
index 3523eef40f..8b3d19e18c 100644
--- a/Marlin/src/feature/Max7219_Debug_LEDs.h
+++ b/Marlin/src/feature/Max7219_Debug_LEDs.h
@@ -47,6 +47,9 @@
 #endif
 #define _ROT ((MAX7219_ROTATE + 360) % 360)
 
+#ifndef MAX7219_NUMBER_UNITS
+  #define MAX7219_NUMBER_UNITS 1
+#endif
 #define MAX7219_LINES (8 * (MAX7219_NUMBER_UNITS))
 
 #if _ROT == 0 || _ROT == 180
-- 
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