Merge pull request #1393 from thinkyhead/issue_1385_timing

Add proper delay in stepper.cpp

Marlin/stepper.cpp

@@ -1110,9 +1110,9 @@ void babystep(const uint8_t axis,const bool direction)
     #ifdef DUAL_X_CARRIAGE
       WRITE(X2_STEP_PIN, !INVERT_X_STEP_PIN);
     #endif
-    {
+
-    float x=1./float(axis+1)/float(axis+2); //wait a tiny bit
+    _delay_us(1U); // wait 1 microsecond
-    }
+
     WRITE(X_STEP_PIN, INVERT_X_STEP_PIN);
     #ifdef DUAL_X_CARRIAGE
       WRITE(X2_STEP_PIN, INVERT_X_STEP_PIN);
@@ -1142,9 +1142,9 @@ void babystep(const uint8_t axis,const bool direction)
     #ifdef DUAL_Y_CARRIAGE
       WRITE(Y2_STEP_PIN, !INVERT_Y_STEP_PIN);
     #endif
-    {
+
-    float x=1./float(axis+1)/float(axis+2); //wait a tiny bit
+    _delay_us(1U); // wait 1 microsecond
-    }
+
     WRITE(Y_STEP_PIN, INVERT_Y_STEP_PIN);
     #ifdef DUAL_Y_CARRIAGE
       WRITE(Y2_STEP_PIN, INVERT_Y_STEP_PIN);
@@ -1174,10 +1174,9 @@ void babystep(const uint8_t axis,const bool direction)
     #ifdef Z_DUAL_STEPPER_DRIVERS
       WRITE(Z2_STEP_PIN, !INVERT_Z_STEP_PIN);
     #endif
-    //wait a tiny bit
+
-    {
+    _delay_us(1U); // wait 1 microsecond
-    float x=1./float(axis+1); //absolutely useless
+
-    }
     WRITE(Z_STEP_PIN, INVERT_Z_STEP_PIN);
     #ifdef Z_DUAL_STEPPER_DRIVERS
       WRITE(Z2_STEP_PIN, INVERT_Z_STEP_PIN);
@@ -1210,10 +1209,8 @@ void babystep(const uint8_t axis,const bool direction)
     WRITE(Y_STEP_PIN, !INVERT_Y_STEP_PIN); 
     WRITE(Z_STEP_PIN, !INVERT_Z_STEP_PIN); 
     
-    //wait a tiny bit
+    _delay_us(1U); // wait 1 microsecond
-    {
+
-    float x=1./float(axis+1); //absolutely useless
-    }
     WRITE(X_STEP_PIN, INVERT_X_STEP_PIN); 
     WRITE(Y_STEP_PIN, INVERT_Y_STEP_PIN); 
     WRITE(Z_STEP_PIN, INVERT_Z_STEP_PIN);