diff --git a/dda.c b/dda.c
index c11fbf3..63b1226 100644
--- a/dda.c
+++ b/dda.c
@@ -21,6 +21,7 @@
 #include	"sersendf.h"
 #include	"pinio.h"
 #include "memory_barrier.h"
+#include "home.h"
 //#include "graycode.c"
 
 #ifdef	DC_EXTRUDER
@@ -767,7 +768,7 @@ void dda_clock() {
   //          endstop search, but as part of normal operations.
   if (dda->endstop_check && ! move_state.endstop_stop) {
     #ifdef X_MIN_PIN
-    if (dda->endstop_check & 0x01) {
+    if (dda->endstop_check & X_MIN_ENDSTOP) {
       if (x_min() == dda->endstop_stop_cond)
         move_state.debounce_count_x++;
       else
@@ -776,7 +777,7 @@ void dda_clock() {
     }
     #endif
     #ifdef X_MAX_PIN
-    if (dda->endstop_check & 0x02) {
+    if (dda->endstop_check & X_MAX_ENDSTOP) {
       if (x_max() == dda->endstop_stop_cond)
         move_state.debounce_count_x++;
       else
@@ -786,7 +787,7 @@ void dda_clock() {
     #endif
 
     #ifdef Y_MIN_PIN
-    if (dda->endstop_check & 0x04) {
+    if (dda->endstop_check & Y_MIN_ENDSTOP) {
       if (y_min() == dda->endstop_stop_cond)
         move_state.debounce_count_y++;
       else
@@ -795,7 +796,7 @@ void dda_clock() {
     }
     #endif
     #ifdef Y_MAX_PIN
-    if (dda->endstop_check & 0x08) {
+    if (dda->endstop_check & Y_MAX_ENDSTOP) {
       if (y_max() == dda->endstop_stop_cond)
         move_state.debounce_count_y++;
       else
@@ -805,7 +806,7 @@ void dda_clock() {
     #endif
 
     #ifdef Z_MIN_PIN
-    if (dda->endstop_check & 0x10) {
+    if (dda->endstop_check & Z_MIN_ENDSTOP) {
       if (z_min() == dda->endstop_stop_cond)
         move_state.debounce_count_z++;
       else
@@ -814,7 +815,7 @@ void dda_clock() {
     }
     #endif
     #ifdef Z_MAX_PIN
-    if (dda->endstop_check & 0x20) {
+    if (dda->endstop_check & Z_MAX_ENDSTOP) {
       if (z_max() == dda->endstop_stop_cond)
         move_state.debounce_count_z++;
       else
diff --git a/home.c b/home.c
index 8c83aea..f9fbcfc 100644
--- a/home.c
+++ b/home.c
@@ -66,7 +66,7 @@ static const uint32_t PROGMEM search_feedrate_P[3] = {
 };
 
 uint8_t get_endstop_check(enum axis_e n, int8_t dir);
-void home_axis(enum axis_e n, int8_t dir);
+void home_axis(enum axis_e n, int8_t dir, enum axis_endstop_e endstop_check);
 void set_axis_home_position(enum axis_e n, int8_t dir);
 
 /// home all 3 axes
@@ -97,7 +97,7 @@ void home() {
 /// find X MIN endstop
 void home_x_negative() {
   #if defined X_MIN_PIN
-    home_axis(X, -1);
+    home_axis(X, -1, X_MIN_ENDSTOP);
   #endif
 }
 
@@ -107,14 +107,14 @@ void home_x_positive() {
     #warning X_MAX_PIN defined, but not X_MAX. home_x_positive() disabled.
   #endif
   #if defined X_MAX_PIN && defined X_MAX
-    home_axis(X, 1);
+    home_axis(X, 1, X_MAX_ENDSTOP);
   #endif
 }
 
 /// fund Y MIN endstop
 void home_y_negative() {
   #if defined Y_MIN_PIN
-    home_axis(Y, -1);
+    home_axis(Y, -1, Y_MIN_ENDSTOP);
   #endif
 }
 
@@ -124,14 +124,14 @@ void home_y_positive() {
     #warning Y_MAX_PIN defined, but not Y_MAX. home_y_positive() disabled.
   #endif
   #if defined Y_MAX_PIN && defined Y_MAX
-    home_axis(Y, 1);
+    home_axis(Y, 1, Y_MAX_ENDSTOP);
   #endif
 }
 
 /// find Z MIN endstop
 void home_z_negative() {
   #if defined Z_MIN_PIN
-    home_axis(Z, -1);
+    home_axis(Z, -1, Z_MIN_ENDSTOP);
   #endif
 }
 
@@ -141,23 +141,13 @@ void home_z_positive() {
     #warning Z_MAX_PIN defined, but not Z_MAX. home_z_positive() disabled.
   #endif
   #if defined Z_MAX_PIN && defined Z_MAX
-    home_axis(Z, 1);
+    home_axis(Z, 1, Z_MAX_ENDSTOP);
   #endif
 }
 
-uint8_t get_endstop_check(enum axis_e n, int8_t dir) {
-  uint8_t endstop_check;
-  if (dir < 0)
-    endstop_check = 1 << (n * 2);
-  else
-    endstop_check = 1 << (n * 2 + 1);
-  return endstop_check;
-}
-
-void home_axis(enum axis_e n, int8_t dir) {
+void home_axis(enum axis_e n, int8_t dir, enum axis_endstop_e endstop_check) {
   TARGET t = startpoint;
   startpoint.axis[n] = 0;
-  uint8_t endstop_check = get_endstop_check(n, dir);
 
   t.axis[n] = dir * MAX_DELTA_UM;
   t.F = pgm_read_dword(&fast_feedrate_P[n]);
diff --git a/home.h b/home.h
index 1c572ab..be58132 100644
--- a/home.h
+++ b/home.h
@@ -3,6 +3,15 @@
 
 void home(void);
 
+enum axis_endstop_e {
+    X_MIN_ENDSTOP = 0x01,
+    X_MAX_ENDSTOP = 0x02,
+    Y_MIN_ENDSTOP = 0x04,
+    Y_MAX_ENDSTOP = 0x08,
+    Z_MIN_ENDSTOP = 0x10,
+    Z_MAX_ENDSTOP = 0x20,
+};
+
 void home_x_negative(void);
 void home_x_positive(void);
 void home_y_negative(void);