From 3ca4f0968098de8d6d1051203204b99dd92e3f93 Mon Sep 17 00:00:00 2001
From: Roxy-3D <Roxy-3D@users.noreply.github.com>
Date: Tue, 19 Jun 2018 14:39:40 -0500
Subject: [PATCH] Tiny improvement to M7219
The registers within the Max7219 can get corrupted a number of ways. This allows the Max7219 to be reset and fully initialized.
And... it also allows the user to see the initialization pattern.
---
Marlin/Configuration_adv.h | 2 +-
Marlin/Marlin_main.cpp | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index e237abd8d64..49277eb7bf4 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -1649,7 +1649,7 @@
//#define MAX7219_GCODE // Add the M7219 G-code to control the LED matrix
#define MAX7219_INIT_TEST // Do a test pattern at initialization (Set to 2 for spiral)
- #define MAX7219_ROTATE 0 // Rotate the display counter-clockwise (multiple of +/- 90°)
+ #define MAX7219_ROTATE 0 // Rotate the display clockwise (in multiples of +/- 90°)
/**
* Sample debug features
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 833600f81d4..01430c707f6 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -10878,7 +10878,7 @@ inline void gcode_M502() {
*/
inline void gcode_M7219() {
if (parser.seen('I'))
- for (uint8_t r = 0; r < 8; r++) Max7219_Set_Row(r, 0);
+ Max7219_init();
else if (parser.seenval('R')) {
const uint8_t r = parser.value_int();
Max7219_Set_Row(r, parser.byteval('V'));