✨ MAX7219_DEBUG_MULTISTEPPING

Co-Authored-By: tombrazier <[email protected]>

Author: thinkyhead

Marlin/Configuration_adv.h

@@ -4052,6 +4052,7 @@
   #define MAX7219_DEBUG_PROFILE       6   // Display the fraction of CPU time spent in profiled code on this LED matrix
                                           // row. By default idle() is profiled so this shows how "idle" the processor is.
                                           // See class CodeProfiler.
+  //#define MAX7219_DEBUG_MULTISTEPPING 6 // Show multistepping 1 to 128 on this LED matrix row.
 #endif
 
 /**

Marlin/src/feature/max7219.cpp

@@ -44,6 +44,7 @@
 #include "max7219.h"
 
 #include "../module/planner.h"
+#include "../module/stepper.h"
 #include "../MarlinCore.h"
 #include "../HAL/shared/Delay.h"
 
@@ -723,6 +724,19 @@ void Max7219::idle_tasks() {
     }
   #endif
 
+  #ifdef MAX7219_DEBUG_MULTISTEPPING
+    static uint8_t last_multistepping = 0;
+    const uint8_t multistepping = Stepper::steps_per_isr;
+    if (multistepping != last_multistepping) {
+      static uint8_t log2_old = 0;
+      uint8_t log2_new = 0;
+      for (uint8_t val = multistepping; val > 1; val >>= 1) log2_new++;
+      mark16(MAX7219_DEBUG_MULTISTEPPING, log2_old, log2_new, &row_change_mask);
+      last_multistepping = multistepping;
+      log2_old = log2_new;
+    }
+  #endif
+
   // batch line updates
   suspended--;
   if (!suspended)

Marlin/src/module/stepper.h

@@ -459,6 +459,7 @@ constexpr ena_mask_t enable_overlap[] = {
 // Stepper class definition
 //
 class Stepper {
+  friend class Max7219;
   friend void stepperTask(void *);
 
   public: