From 7fad13a1e2cc35e577420801cd82e5feaa5d9c27 Mon Sep 17 00:00:00 2001
From: bkubicek <bkubicek@x201.(none)>
Date: Sat, 12 Oct 2013 13:24:55 +0200
Subject: [PATCH] Reverse SD card file name order. This is _not_ automatically
 the cronological, since deleting a file will free the filesystem descriptor
 for it, which then will be used by the next file copied on it. Since this
 makes the auto0.g file very inaccessible, I put the option back, to have it
 in the prepare menu.

this should satisfy https://github.com/ErikZalm/Marlin/pull/373

as a reminder, auto0.g will be executed every time after a boot with sd card present and file present.
thereafter, if there is a file auto1.g this will be done. Thats IMHO the best place to put settings, and prepare heating.
I also execute again after each (now again via the prepare menu) before starting a new print/ after a failed one.
It for me 100% replaces any start.gcode form the slicers.
---
 Marlin/Configuration_adv.h | 11 +++++++++++
 Marlin/ultralcd.cpp        | 10 ++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 0392acaac7..23ca5efec8 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -257,6 +257,11 @@
 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.
 
+#define SDCARD_RATHERRECENTFIRST  //reverse file order of sd card menu display. Its sorted practically after the filesystem block order. 
+// if a file is deleted, it frees a block. hence, the order is not purely cronological. To still have auto0.g accessible, there is again the option to do that.
+// using:
+//#define MENU_ADDAUTOSTART
+
 // The hardware watchdog should reset the Microcontroller disabling all outputs, in case the firmware gets stuck and doesn't do temperature regulation.
 //#define USE_WATCHDOG
 
@@ -380,6 +385,12 @@ const unsigned int dropsegments=5; //everything with less than this number of st
     #define FILAMENTCHANGE_FINALRETRACT -100
   #endif
 #endif
+
+#ifdef FILAMENTCHANGEENABLE
+  #ifdef EXTRUDER_RUNOUT_PREVENT
+    #error EXTRUDER_RUNOUT_PREVENT currently incompatible with FILAMENTCHANGE
+  #endif 
+#endif
  
 //===========================================================================
 //=============================  Define Defines  ============================
diff --git a/Marlin/ultralcd.cpp b/Marlin/ultralcd.cpp
index 0e8c8697d4..12a9e23bc3 100644
--- a/Marlin/ultralcd.cpp
+++ b/Marlin/ultralcd.cpp
@@ -420,7 +420,9 @@ static void lcd_prepare_menu()
     START_MENU();
     MENU_ITEM(back, MSG_MAIN, lcd_main_menu);
 #ifdef SDSUPPORT
-    //MENU_ITEM(function, MSG_AUTOSTART, lcd_autostart_sd);
+    #ifdef MENU_ADDAUTOSTART
+      MENU_ITEM(function, MSG_AUTOSTART, lcd_autostart_sd);
+    #endif
 #endif
     MENU_ITEM(gcode, MSG_DISABLE_STEPPERS, PSTR("M84"));
     MENU_ITEM(gcode, MSG_AUTO_HOME, PSTR("G28"));
@@ -792,7 +794,11 @@ void lcd_sdcard_menu()
     {
         if (_menuItemNr == _lineNr)
         {
-            card.getfilename(i);
+            #ifndef SDCARD_RATHERRECENTFIRST
+              card.getfilename(i);
+            #else
+              card.getfilename(fileCnt-1-i);
+            #endif
             if (card.filenameIsDir)
             {
                 MENU_ITEM(sddirectory, MSG_CARD_MENU, card.filename, card.longFilename);