diff --git a/Libraries/u8glib/u8g_dev_gprof.c b/Libraries/u8glib/u8g_dev_gprof.c
new file mode 100644
--- /dev/null
+++ b/Libraries/u8glib/u8g_dev_gprof.c
@@ -0,0 +1,130 @@
+/*
+
+  u8g_dev_gprof.c
+
+  Device for performance measurement with gprof.
+  Does not write any data, but uses a buffer.
+
+  Universal 8bit Graphics Library
+  
+  Copyright (c) 2011, olikraus@gmail.com
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification, 
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice, this list 
+    of conditions and the following disclaimer.
+    
+  * Redistributions in binary form must reproduce the above copyright notice, this 
+    list of conditions and the following disclaimer in the documentation and/or other 
+    materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
+  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
+  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+  
+  
+
+*/
+
+#include "u8g.h"
+
+
+#define WIDTH 128
+#define HEIGHT 64
+#define PAGE_HEIGHT 8
+
+uint8_t u8g_dev_gprof_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
+
+uint8_t u8g_pb_dev_gprof_buf[WIDTH];
+u8g_pb_t u8g_pb_dev_gprof = { {PAGE_HEIGHT, HEIGHT, 0, 0, 0},  WIDTH, u8g_pb_dev_gprof_buf };
+
+u8g_dev_t u8g_dev_gprof = { u8g_dev_gprof_fn, &u8g_pb_dev_gprof, NULL };
+
+uint8_t u8g_dev_gprof_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
+{
+  u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
+  
+  switch(msg)
+  {
+    case U8G_DEV_MSG_INIT:
+      break;
+    case U8G_DEV_MSG_STOP:
+      break;
+    case U8G_DEV_MSG_PAGE_FIRST:
+      u8g_pb_Clear(pb);
+      u8g_page_First(&(pb->p));
+      break;
+    case U8G_DEV_MSG_PAGE_NEXT:
+      /*
+      {
+        uint8_t i, j;
+        uint8_t page_height;
+        page_height = pb->p.page_y1;
+        page_height -= pb->p.page_y0;
+        page_height++;
+        for( j = 0; j < page_height; j++ )
+        {
+          printf("%02d ", j);
+          for( i = 0; i < WIDTH; i++ )
+          {
+            if ( (u8g_pb_dev_stdout_buf[i] & (1<<j)) != 0 )
+              printf("#");
+            else
+              printf(".");
+          }
+          printf("\n");
+        }
+      }
+      */
+      if ( u8g_page_Next(&(pb->p)) == 0 )
+      {
+        //printf("\n");
+        return 0;
+      }
+      u8g_pb_Clear(pb);
+      break;
+#ifdef U8G_DEV_MSG_IS_BBX_INTERSECTION
+    case U8G_DEV_MSG_IS_BBX_INTERSECTION:
+       {
+        u8g_dev_arg_bbx_t *bbx = (u8g_dev_arg_bbx_t *)arg;
+        u8g_uint_t x2, y2;
+
+        y2 = bbx->y;
+        y2 += bbx->h;
+        y2--;
+        
+        if ( u8g_pb_IsYIntersection(pb, bbx->y, y2) == 0 )
+          return 0;
+        
+        /* maybe this one can be skiped... probability is very high to have an intersection, so it would be ok to always return 1 */
+        x2 = bbx->x;
+        x2 += bbx->w;
+        x2--;
+        
+        if ( u8g_pb_IsXIntersection(pb, bbx->x, x2) == 0 )
+          return 0;
+      }
+      return 1;
+#endif
+    case U8G_DEV_MSG_GET_PAGE_BOX:
+      u8g_pb_GetPageBox(pb, (u8g_box_t *)arg);
+      break;
+    case U8G_DEV_MSG_SET_COLOR_ENTRY:
+      break;
+    case U8G_DEV_MSG_SET_XY_CB:
+      break;
+  }
+  return u8g_dev_pb8v1_base_fn(u8g, dev, msg, arg);
+}