Support for multiple Max7219 units in a chain (#11226)

* Support for multiple Max7219 units in a chain

I'll move this support over to bugfix_2.0.0 in the next few days.   And
then look at updating the Max7219_idle() routine to make use of multiple
units in a chain.

* spelling correction

Marlin/example_configurations/AlephObjects/TAZ4/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Anet/A6/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Anet/A8/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/BIBO/TouchX/Cyclops/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/BIBO/TouchX/default/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/BQ/Hephestos/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/BQ/Hephestos_2/Configuration_adv.h

@@ -1667,10 +1667,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/BQ/WITBOX/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Cartesio/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/CR-10/Configuration_adv.h

@@ -1662,10 +1662,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/CR-10S/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/CR-10mini/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/CR-8/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/Ender-2/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/Ender-3/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Creality/Ender-4/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Felix/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/FolgerTech/i3-2020/Configuration_adv.h

@@ -1667,10 +1667,11 @@
 //#define MAX7219_DIN_PIN   34 // for RAMPS E1
 //#define MAX7219_LOAD_PIN  36 // for RAMPS E1
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE     -90   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Infitary/i3-M508/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/JGAurora/A5/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Malyan/M150/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Micromake/C1/enhanced/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/RigidBot/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/SCARA/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Sanguinololu/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/TinyBoy2/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Velleman/K8200/Configuration_adv.h

@@ -1662,10 +1662,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/Velleman/K8400/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/FLSUN/auto_calibrate/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/FLSUN/kossel/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/FLSUN/kossel_mini/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/generic/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

@@ -1666,10 +1666,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

@@ -1661,10 +1661,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/gCreate/gMax1.5+/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE     -90   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/makibox/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

@@ -1659,10 +1659,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!

Marlin/example_configurations/wt150/Configuration_adv.h

@@ -1660,10 +1660,11 @@
   #define MAX7219_DIN_PIN   57
   #define MAX7219_LOAD_PIN  44
 
-  //#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 clockwise (in multiples of +/- 90°)
-
+  //#define MAX7219_GCODE          // Add the M7219 G-code to control the LED matrix
+  #define MAX7219_INIT_TEST 2      // Do a test pattern at initialization (Set to 2 for spiral)
+  #define MAX7219_NUMBER_UNITS 1   // Number of Max7219 units in chain.
+  #define MAX7219_ROTATE       0   // Rotate the display clockwise (in multiples of +/- 90°)
+                                   // connector at:  right=0   bottom=-90  top=90  left=180
   /**
    * Sample debug features
    * If you add more debug displays, be careful to avoid conflicts!