From ed7f3ad55922407f08960fefaf73258e944bc6dc Mon Sep 17 00:00:00 2001
From: Phil Hord <hordp@cisco.com>
Date: Fri, 13 Dec 2013 11:10:02 -0500
Subject: [PATCH] simulator: Respect XYZE_INVERT_DIR settings

Simulator assumes a basic set of config pins.  Most it ignores
and redefines.  But the INVERT_DIR pins it did not, and these
could be useful to simulate.  So teach Simulator to respect them.
---
 simulator/simulator.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/simulator/simulator.c b/simulator/simulator.c
index 2388708..003d76a 100644
--- a/simulator/simulator.c
+++ b/simulator/simulator.c
@@ -340,18 +340,30 @@ void WRITE(pin_t pin, bool s) {
     switch (pin) {
     case X_STEP_PIN:
       dir = state[X_DIR_PIN] ? 1 : -1;
+      #ifdef X_INVERT_DIR
+        dir = -dir;
+      #endif
       axis = X_AXIS;
       break;
     case Y_STEP_PIN:
       dir = state[Y_DIR_PIN] ? 1 : -1;
+      #ifdef Y_INVERT_DIR
+        dir = -dir;
+      #endif
       axis = Y_AXIS;
       break;
     case Z_STEP_PIN:
       dir = state[Z_DIR_PIN] ? 1 : -1;
+      #ifdef Z_INVERT_DIR
+        dir = -dir;
+      #endif
       axis = Z_AXIS;
       break;
     case E_STEP_PIN:
       dir = state[E_DIR_PIN] ? 1 : -1;
+      #ifdef E_INVERT_DIR
+        dir = -dir;
+      #endif
       axis = E_AXIS;
       break;
     default: