Merge pull request #5060 from thinkyhead/rc_fix_ugly_code

Reduce, clean up MINTEMP / MAXTEMP test code

Marlin/Marlin_main.cpp

       if (DEBUGGING(LEVELING)) DEBUG_POS(">>> home_delta", current_position);
     #endif
     // Init the current position of all carriages to 0,0,0
-    memset(current_position, 0, sizeof(current_position));
+    ZERO(current_position);
     sync_plan_position();
 
     // Move all carriages together linearly until an endstop is hit.

Marlin/SdBaseFile.cpp

       index = 0;
     }
     // initialize as empty file
-    memset(p, 0, sizeof(dir_t));
+    ZERO(p);
     memcpy(p->name, dname, 11);
 
     // set timestamps

Marlin/cardreader.cpp

   sdpos = 0;
   workDirDepth = 0;
   file_subcall_ctr = 0;
-  memset(workDirParents, 0, sizeof(workDirParents));
+  ZERO(workDirParents);
 
   autostart_stilltocheck = true; //the SD start is delayed, because otherwise the serial cannot answer fast enough to make contact with the host software.
   autostart_index = 0;

Marlin/configuration_store.cpp

 
 // Change EEPROM version if these are changed:
 #define EEPROM_OFFSET 100
-#define MAX_EXTRUDERS 4
 
 /**
  * V24 EEPROM Layout:

Marlin/macros.h

 #define NUMERIC(a) ((a) >= '0' && '9' >= (a))
 #define NUMERIC_SIGNED(a) (NUMERIC(a) || (a) == '-')
 #define COUNT(a) (sizeof(a)/sizeof(*a))
+#define ZERO(a) memset(a,0,sizeof(a))
 
 // Macros for initializing arrays
 #define ARRAY_6(v1, v2, v3, v4, v5, v6, args...) { v1, v2, v3, v4, v5, v6 }

Marlin/mesh_bed_leveling.cpp

   void mesh_bed_leveling::reset() {
     status = MBL_STATUS_NONE;
     z_offset = 0;
-    memset(z_values, 0, sizeof(z_values));
+    ZERO(z_values);
   }
 
 #endif  // MESH_BED_LEVELING

Marlin/pins.h

   #define SUICIDE_PIN -1
 #endif
 
+#ifndef MAX_EXTRUDERS
+  #define MAX_EXTRUDERS 4
+#endif
+
 // Marlin needs to account for pins that equal -1
 #define marlinAnalogInputToDigitalPin(p) ((p) == -1 ? -1 : analogInputToDigitalPin(p))
 

Marlin/planner.cpp

 
 void Planner::init() {
   block_buffer_head = block_buffer_tail = 0;
-  memset(position, 0, sizeof(position));
-  memset(previous_speed, 0, sizeof(previous_speed));
+  ZERO(position);
+  ZERO(previous_speed);
   previous_nominal_speed = 0.0;
   #if ABL_PLANAR
     bed_level_matrix.set_to_identity();
   stepper.set_position(na, nb, nc, ne);
   previous_nominal_speed = 0.0; // Resets planner junction speeds. Assumes start from rest.
 
-  memset(previous_speed, 0, sizeof(previous_speed));
+  ZERO(previous_speed);
 }
 
 void Planner::set_position_mm_kinematic(const float position[NUM_AXIS]) {

Marlin/temperature.cpp

   millis_t Temperature::next_bed_check_ms;
 #endif
 
-unsigned long Temperature::raw_temp_value[4] = { 0 };
+unsigned long Temperature::raw_temp_value[MAX_EXTRUDERS] = { 0 };
 unsigned long Temperature::raw_temp_bed_value = 0;
 
 // Init min and max temp with extreme values to prevent false errors during startup
   } // switch(temp_state)
 
   if (temp_count >= OVERSAMPLENR) { // 10 * 16 * 1/(16000000/64/256)  = 164ms.
+
+    temp_count = 0;
+
     // Update the raw values if they've been read. Else we could be updating them during reading.
     if (!temp_meas_ready) set_current_temp_raw();
 
       current_raw_filwidth = raw_filwidth_value >> 10;  // Divide to get to 0-16384 range since we used 1/128 IIR filter approach
     #endif
 
-    temp_count = 0;
-    for (int i = 0; i < 4; i++) raw_temp_value[i] = 0;
+    ZERO(raw_temp_value);
     raw_temp_bed_value = 0;
 
-    #if HAS_TEMP_0 && DISABLED(HEATER_0_USES_MAX6675)
-      #if HEATER_0_RAW_LO_TEMP > HEATER_0_RAW_HI_TEMP
-        #define GE0 <=
+    int constexpr temp_dir[] = {
+      #if ENABLED(HEATER_0_USES_MAX6675)
+         0
+      #elif HEATER_0_RAW_LO_TEMP > HEATER_0_RAW_HI_TEMP
+        -1
       #else
-        #define GE0 >=
+         1
       #endif
-      if (current_temperature_raw[0] GE0 maxttemp_raw[0]) max_temp_error(0);
-      if (minttemp_raw[0] GE0 current_temperature_raw[0] && !is_preheating(0) && target_temperature[0] > 0.0f) {
-        #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-          if (++consecutive_low_temperature_error[0] >= MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED)
+      #if HAS_TEMP_1 && HOTENDS > 1
+        #if HEATER_1_RAW_LO_TEMP > HEATER_1_RAW_HI_TEMP
+          , -1
+        #else
+          ,  1
         #endif
-            min_temp_error(0);
-      }
-      #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-        else
-          consecutive_low_temperature_error[0] = 0;
       #endif
-    #endif
-
-    #if HAS_TEMP_1 && HOTENDS > 1
-      #if HEATER_1_RAW_LO_TEMP > HEATER_1_RAW_HI_TEMP
-        #define GE1 <=
-      #else
-        #define GE1 >=
-      #endif
-      if (current_temperature_raw[1] GE1 maxttemp_raw[1]) max_temp_error(1);
-      if (minttemp_raw[1] GE1 current_temperature_raw[1] && !is_preheating(1) && target_temperature[1] > 0.0f) {
-        #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-          if (++consecutive_low_temperature_error[1] >= MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED)
+      #if HAS_TEMP_2 && HOTENDS > 2
+        #if HEATER_2_RAW_LO_TEMP > HEATER_2_RAW_HI_TEMP
+          , -1
+        #else
+          ,  1
         #endif
-          min_temp_error(1);
-      }
-      #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-        else
-          consecutive_low_temperature_error[1] = 0;
-      #endif
-    #endif // TEMP_SENSOR_1
-
-    #if HAS_TEMP_2 && HOTENDS > 2
-      #if HEATER_2_RAW_LO_TEMP > HEATER_2_RAW_HI_TEMP
-        #define GE2 <=
-      #else
-        #define GE2 >=
       #endif
-      if (current_temperature_raw[2] GE2 maxttemp_raw[2]) max_temp_error(2);
-      if (minttemp_raw[2] GE2 current_temperature_raw[2] && !is_preheating(2) && target_temperature[2] > 0.0f) {
-        #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-          if (++consecutive_low_temperature_error[2] >= MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED)
+      #if HAS_TEMP_3 && HOTENDS > 3
+        #if HEATER_3_RAW_LO_TEMP > HEATER_3_RAW_HI_TEMP
+          , -1
+        #else
+          ,  1
         #endif
-          min_temp_error(2);
-      }
-      #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-        else
-          consecutive_low_temperature_error[2] = 0;
       #endif
-    #endif // TEMP_SENSOR_2
+    };
 
-    #if HAS_TEMP_3 && HOTENDS > 3
-      #if HEATER_3_RAW_LO_TEMP > HEATER_3_RAW_HI_TEMP
-        #define GE3 <=
-      #else
-        #define GE3 >=
-      #endif
-      if (current_temperature_raw[3] GE3 maxttemp_raw[3]) max_temp_error(3);
-      if (minttemp_raw[3] GE3 current_temperature_raw[3] && !is_preheating(3) && target_temperature[3] > 0.0f) {
+    for (uint8_t e = 0; e < COUNT(temp_dir); e++) {
+      const int tdir = temp_dir[e], rawtemp = current_temperature_raw[e] * tdir;
+      if (rawtemp > maxttemp_raw[e] * tdir) max_temp_error(e);
+      if (rawtemp < minttemp_raw[e] * tdir && !is_preheating(e) && target_temperature[e] > 0.0f) {
         #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
-          if (++consecutive_low_temperature_error[3] >= MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED)
+          if (++consecutive_low_temperature_error[e] >= MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED)
         #endif
-          min_temp_error(3);
+            min_temp_error(e);
       }
       #ifdef MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED
         else
-          consecutive_low_temperature_error[3] = 0;
+          consecutive_low_temperature_error[e] = 0;
       #endif
-    #endif // TEMP_SENSOR_3
+    }
 
     #if HAS_TEMP_BED
       #if HEATER_BED_RAW_LO_TEMP > HEATER_BED_RAW_HI_TEMP