diff --git a/Libraries/u8glib/u8g_ll_api.c b/Libraries/u8glib/u8g_ll_api.c
new file mode 100644
--- /dev/null
+++ b/Libraries/u8glib/u8g_ll_api.c
@@ -0,0 +1,573 @@
+/*
+
+  u8g_ll_api.c
+  
+  low level api
+
+  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 <stddef.h>
+#include "u8g.h"
+
+uint8_t u8g_call_dev_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
+{
+  return dev->dev_fn(u8g, dev, msg, arg); 
+}
+
+/*====================================================================*/
+
+uint8_t u8g_InitLL(u8g_t *u8g, u8g_dev_t *dev)
+{
+  uint8_t r;
+  u8g->state_cb(U8G_STATE_MSG_BACKUP_ENV);
+  r =  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_INIT, NULL);
+  u8g->state_cb(U8G_STATE_MSG_BACKUP_U8G);
+  u8g->state_cb(U8G_STATE_MSG_RESTORE_ENV);
+  return r;
+}
+
+void u8g_FirstPageLL(u8g_t *u8g, u8g_dev_t *dev)
+{  
+  u8g->state_cb(U8G_STATE_MSG_BACKUP_ENV);
+  u8g->state_cb(U8G_STATE_MSG_RESTORE_U8G);
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_PAGE_FIRST, NULL);
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_GET_PAGE_BOX, &(u8g->current_page));
+  u8g->state_cb(U8G_STATE_MSG_RESTORE_ENV);
+}
+
+uint8_t u8g_NextPageLL(u8g_t *u8g, u8g_dev_t *dev)
+{  
+  uint8_t r;
+  u8g->state_cb(U8G_STATE_MSG_BACKUP_ENV);
+  u8g->state_cb(U8G_STATE_MSG_RESTORE_U8G);
+  r = u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_PAGE_NEXT, NULL);
+  if ( r != 0 )
+  {
+    u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_GET_PAGE_BOX, &(u8g->current_page));
+  }
+  u8g->state_cb(U8G_STATE_MSG_RESTORE_ENV);
+  return r;
+}
+
+uint8_t u8g_SetContrastLL(u8g_t *u8g, u8g_dev_t *dev, uint8_t contrast)
+{  
+  return u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_CONTRAST, &contrast);
+}
+
+void u8g_DrawPixelLL(u8g_t *u8g, u8g_dev_t *dev, u8g_uint_t x, u8g_uint_t y)
+{
+  u8g_dev_arg_pixel_t *arg = &(u8g->arg_pixel);
+  arg->x = x;
+  arg->y = y;
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_SET_PIXEL, arg);
+}
+
+void u8g_Draw8PixelLL(u8g_t *u8g, u8g_dev_t *dev, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t pixel)
+{
+  u8g_dev_arg_pixel_t *arg = &(u8g->arg_pixel);
+  arg->x = x;
+  arg->y = y;
+  arg->dir = dir;
+  arg->pixel = pixel;
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_SET_8PIXEL, arg);
+}
+
+void u8g_Draw4TPixelLL(u8g_t *u8g, u8g_dev_t *dev, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t pixel)
+{
+  u8g_dev_arg_pixel_t *arg = &(u8g->arg_pixel);
+  arg->x = x;
+  arg->y = y;
+  arg->dir = dir;
+  arg->pixel = pixel;
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_SET_4TPIXEL, arg);
+}
+
+
+#ifdef U8G_DEV_MSG_IS_BBX_INTERSECTION
+uint8_t u8g_IsBBXIntersectionLL(u8g_t *u8g, u8g_dev_t *dev, u8g_uint_t x, u8g_uint_t y, u8g_uint_t w, u8g_uint_t h)
+{  
+  return u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_IS_BBX_INTERSECTION, &arg);
+}
+#endif
+
+
+
+u8g_uint_t u8g_GetWidthLL(u8g_t *u8g, u8g_dev_t *dev)
+{
+  u8g_uint_t r;
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_GET_WIDTH, &r);
+  return r;
+}
+
+u8g_uint_t u8g_GetHeightLL(u8g_t *u8g, u8g_dev_t *dev)
+{       
+  u8g_uint_t r;
+  u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_GET_HEIGHT, &r);
+  return r;
+}
+
+u8g_uint_t u8g_GetModeLL(u8g_t *u8g, u8g_dev_t *dev)
+{       
+  return u8g_call_dev_fn(u8g, dev, U8G_DEV_MSG_GET_MODE, NULL);
+}
+
+
+
+/*====================================================================*/
+
+void u8g_UpdateDimension(u8g_t *u8g)
+{
+  u8g->width = u8g_GetWidthLL(u8g, u8g->dev);
+  u8g->height = u8g_GetHeightLL(u8g, u8g->dev);
+  u8g->mode = u8g_GetModeLL(u8g, u8g->dev);
+  /* 9 Dec 2012: u8g_scale.c requires update of current page */
+  u8g_call_dev_fn(u8g, u8g->dev, U8G_DEV_MSG_GET_PAGE_BOX, &(u8g->current_page));
+}
+
+static void u8g_init_data(u8g_t *u8g)
+{
+  u8g->font = NULL;
+  u8g->cursor_font = NULL;
+  u8g->cursor_bg_color = 0;
+  u8g->cursor_fg_color = 1;
+  u8g->cursor_encoding = 34;
+  u8g->cursor_fn = (u8g_draw_cursor_fn)0;
+
+#if defined(U8G_WITH_PINLIST)  
+  {
+    uint8_t i;
+    for( i = 0; i < U8G_PIN_LIST_LEN; i++ )
+      u8g->pin_list[i] = U8G_PIN_NONE;
+  }
+#endif
+  
+  u8g_SetColorIndex(u8g, 1);
+
+  u8g_SetFontPosBaseline(u8g);
+  
+  u8g->font_height_mode = U8G_FONT_HEIGHT_MODE_XTEXT;
+  u8g->font_ref_ascent = 0;
+  u8g->font_ref_descent = 0;
+  u8g->font_line_spacing_factor = 64;           /* 64 = 1.0, 77 = 1.2 line spacing factor */
+  u8g->line_spacing = 0;
+  
+  u8g->state_cb = u8g_state_dummy_cb;
+
+}
+
+uint8_t u8g_Begin(u8g_t *u8g)
+{
+  /* call and init low level driver and com device */
+  if ( u8g_InitLL(u8g, u8g->dev) == 0 )
+    return 0;
+  /* fetch width and height from the low level */
+  u8g_UpdateDimension(u8g);
+  return 1;
+}
+
+uint8_t u8g_Init(u8g_t *u8g, u8g_dev_t *dev)
+{
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+  
+  /* On the Arduino Environment this will lead to two calls to u8g_Begin(), the following line will be called first (by U8glib constructors) */
+  /* if - in future releases - this is removed, then still call u8g_UpdateDimension() */
+  /* if Arduino call u8g_UpdateDimension else u8g_Begin */
+  /* issue 146 */
+  return u8g_Begin(u8g);
+}
+
+/* special init for pure ARM systems */
+uint8_t u8g_InitComFn(u8g_t *u8g, u8g_dev_t *dev, u8g_com_fnptr com_fn)
+{
+  u8g_init_data(u8g);
+  
+#if defined(U8G_WITH_PINLIST)  
+  {
+    uint8_t i;
+    for( i = 0; i < U8G_PIN_LIST_LEN; i++ )
+      u8g->pin_list[i] = U8G_PIN_DUMMY;
+  }
+#endif
+  
+  u8g->dev = dev;
+  
+  /* replace the device procedure with a custom communication procedure */
+  u8g->dev->com_fn = com_fn;
+  
+  /* On the Arduino Environment this will lead to two calls to u8g_Begin(), the following line will be called first (by U8glib constructors) */
+  /* if - in future releases - this is removed, then still call u8g_UpdateDimension() */
+  /* if Arduino call u8g_UpdateDimension else u8g_Begin */
+  /* issue 146 */
+  return u8g_Begin(u8g);
+}
+
+
+#if defined(U8G_WITH_PINLIST)  
+uint8_t u8g_InitSPI(u8g_t *u8g, u8g_dev_t *dev, uint8_t sck, uint8_t mosi, uint8_t cs, uint8_t a0, uint8_t reset)
+{
+  
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+    
+  /* assign user pins */
+  u8g->pin_list[U8G_PI_SCK] = sck;
+  u8g->pin_list[U8G_PI_MOSI] = mosi;
+  u8g->pin_list[U8G_PI_CS] = cs;
+  u8g->pin_list[U8G_PI_A0] = a0;
+  u8g->pin_list[U8G_PI_RESET] = reset;
+  
+  /* On the Arduino Environment this will lead to two calls to u8g_Begin(), the following line will be called first (by U8glib constructors) */
+  /* if - in future releases - this is removed, then still call u8g_UpdateDimension() */
+  /* if Arduino call u8g_UpdateDimension else u8g_Begin */
+  /* issue 146 */
+  return u8g_Begin(u8g);
+}
+
+uint8_t u8g_InitHWSPI(u8g_t *u8g, u8g_dev_t *dev, uint8_t cs, uint8_t a0, uint8_t reset)
+{
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+  
+  
+  /* assign user pins */
+  u8g->pin_list[U8G_PI_CS] = cs;
+  u8g->pin_list[U8G_PI_A0] = a0;
+  u8g->pin_list[U8G_PI_RESET] = reset;
+  
+  return u8g_Begin(u8g);
+}
+
+uint8_t u8g_InitI2C(u8g_t *u8g, u8g_dev_t *dev, uint8_t options)
+{
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+    
+  u8g->pin_list[U8G_PI_I2C_OPTION] = options;
+  
+  return u8g_Begin(u8g);
+}
+
+
+uint8_t u8g_Init8BitFixedPort(u8g_t *u8g, u8g_dev_t *dev, uint8_t en, uint8_t cs, uint8_t di, uint8_t rw, uint8_t reset)
+{
+  
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+    
+  /* assign user pins */
+
+  u8g->pin_list[U8G_PI_EN] = en;
+  u8g->pin_list[U8G_PI_CS] = cs;
+  u8g->pin_list[U8G_PI_DI] = di;
+  u8g->pin_list[U8G_PI_RW] = rw;
+  u8g->pin_list[U8G_PI_RESET] = reset;
+
+  return u8g_Begin(u8g);
+}
+
+uint8_t u8g_Init8Bit(u8g_t *u8g, u8g_dev_t *dev, uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7, 
+  uint8_t en, uint8_t cs1, uint8_t cs2, uint8_t di, uint8_t rw, uint8_t reset)
+{
+  
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+    
+  /* assign user pins */
+
+  u8g->pin_list[U8G_PI_D0] = d0;
+  u8g->pin_list[U8G_PI_D1] = d1;
+  u8g->pin_list[U8G_PI_D2] = d2;
+  u8g->pin_list[U8G_PI_D3] = d3;
+  u8g->pin_list[U8G_PI_D4] = d4;
+  u8g->pin_list[U8G_PI_D5] = d5;
+  u8g->pin_list[U8G_PI_D6] = d6;
+  u8g->pin_list[U8G_PI_D7] = d7;
+
+  u8g->pin_list[U8G_PI_EN] = en;
+  u8g->pin_list[U8G_PI_CS1] = cs1;
+  u8g->pin_list[U8G_PI_CS2] = cs2;
+  u8g->pin_list[U8G_PI_DI] = di;
+  u8g->pin_list[U8G_PI_RW] = rw;
+  u8g->pin_list[U8G_PI_RESET] = reset;
+  
+  return u8g_Begin(u8g);
+}
+
+/*
+
+  PIN_D0 8
+  PIN_D1 9
+  PIN_D2 10
+  PIN_D3 11
+  PIN_D4 4
+  PIN_D5 5
+  PIN_D6 6
+  PIN_D7 7
+
+  PIN_CS 14
+  PIN_A0 15
+  PIN_RESET 16
+  PIN_WR 17
+  PIN_RD 18
+  
+  u8g_InitRW8Bit(u8g, dev, d0, d1, d2, d3, d4, d5, d6, d7, cs, a0, wr, rd, reset)
+  u8g_InitRW8Bit(u8g, dev,  8,  9, 10, 11,  4,  5,  6,  7, 14, 15, 17, 18, 16)
+
+*/
+
+uint8_t u8g_InitRW8Bit(u8g_t *u8g, u8g_dev_t *dev, uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7, 
+  uint8_t cs, uint8_t a0, uint8_t wr, uint8_t rd, uint8_t reset)
+{
+  
+  /* fill data structure with some suitable values */
+  u8g_init_data(u8g);
+  u8g->dev = dev;
+    
+  /* assign user pins */
+
+  u8g->pin_list[U8G_PI_D0] = d0;
+  u8g->pin_list[U8G_PI_D1] = d1;
+  u8g->pin_list[U8G_PI_D2] = d2;
+  u8g->pin_list[U8G_PI_D3] = d3;
+  u8g->pin_list[U8G_PI_D4] = d4;
+  u8g->pin_list[U8G_PI_D5] = d5;
+  u8g->pin_list[U8G_PI_D6] = d6;
+  u8g->pin_list[U8G_PI_D7] = d7;
+
+  u8g->pin_list[U8G_PI_CS] = cs;
+  u8g->pin_list[U8G_PI_A0] = a0;
+  u8g->pin_list[U8G_PI_WR] = wr;
+  u8g->pin_list[U8G_PI_RD] = rd;
+  u8g->pin_list[U8G_PI_RESET] = reset;
+  
+  return u8g_Begin(u8g);
+}
+#endif /* defined(U8G_WITH_PINLIST)  */
+
+void u8g_FirstPage(u8g_t *u8g)
+{
+  u8g_FirstPageLL(u8g, u8g->dev);
+}
+
+uint8_t u8g_NextPage(u8g_t *u8g)
+{
+  if  ( u8g->cursor_fn != (u8g_draw_cursor_fn)0 )
+  {
+    u8g->cursor_fn(u8g);
+  }
+  return u8g_NextPageLL(u8g, u8g->dev);
+}
+
+uint8_t u8g_SetContrast(u8g_t *u8g, uint8_t contrast)
+{
+  return u8g_SetContrastLL(u8g, u8g->dev, contrast);
+}
+
+void u8g_SleepOn(u8g_t *u8g)
+{
+  u8g_call_dev_fn(u8g, u8g->dev, U8G_DEV_MSG_SLEEP_ON, NULL);
+}
+
+void u8g_SleepOff(u8g_t *u8g)
+{
+  u8g_call_dev_fn(u8g, u8g->dev, U8G_DEV_MSG_SLEEP_OFF, NULL);
+}
+
+
+void u8g_DrawPixel(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y)
+{
+  u8g_DrawPixelLL(u8g, u8g->dev, x, y);
+}
+
+void u8g_Draw8Pixel(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t pixel)
+{
+  u8g_Draw8PixelLL(u8g, u8g->dev, x, y, dir, pixel);
+}
+
+void u8g_Draw4TPixel(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t pixel)
+{
+  u8g_Draw4TPixelLL(u8g, u8g->dev, x, y, dir, pixel);
+}
+
+
+/* u8g_IsBBXIntersection() has been moved to u8g_clip.c */
+#ifdef OBSOLETE_CODE
+uint8_t u8g_IsBBXIntersection(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, u8g_uint_t w, u8g_uint_t h)
+{
+  /* new code */
+  u8g_dev_arg_bbx_t arg;
+  arg.x = x;
+  arg.y = y;
+  arg.w = w;
+  arg.h = h;
+  return u8g_is_box_bbx_intersection(&(u8g->current_page), &arg);
+
+  /* old code */
+  //return u8g_IsBBXIntersectionLL(u8g, u8g->dev, x, y, w, h);
+}
+#endif
+
+/*
+  idx: index for the palette entry (0..255)
+  r: value for red (0..255)
+  g: value for green (0..255)
+  b: value for blue (0..255)
+*/
+void u8g_SetColorEntry(u8g_t *u8g, uint8_t idx, uint8_t r, uint8_t g, uint8_t b)
+{
+  u8g_dev_arg_irgb_t irgb;
+  irgb.idx = idx;
+  irgb.r = r;
+  irgb.g = g;
+  irgb.b = b;  
+  u8g_call_dev_fn(u8g, u8g->dev, U8G_DEV_MSG_SET_COLOR_ENTRY, &irgb);
+}
+
+void u8g_SetColorIndex(u8g_t *u8g, uint8_t idx)
+{
+  u8g->arg_pixel.color = idx;
+  /*u8g->color_index = idx; */ /* must be removed */
+}
+
+void u8g_SetHiColor(u8g_t *u8g, uint16_t rgb)
+{
+  u8g->arg_pixel.color = rgb&255;
+  u8g->arg_pixel.hi_color = rgb>>8;
+  /*u8g->color_index = idx; */ /* must be removed */
+}
+
+void u8g_SetHiColorByRGB(u8g_t *u8g, uint8_t r, uint8_t g, uint8_t b)
+{
+  
+  r &= ~7;
+  g >>= 2;
+  b >>= 3;
+  u8g->arg_pixel.color = b;
+  u8g->arg_pixel.color |= (g & 7) << 5;
+  u8g->arg_pixel.hi_color = r;
+  u8g->arg_pixel.hi_color |= (g>>3) & 7;
+  
+  //u8g_SetHiColor(u8g, U8G_GET_HICOLOR_BY_RGB(r,g,b));
+}
+
+void u8g_SetRGB(u8g_t *u8g, uint8_t r, uint8_t g, uint8_t b)
+{
+  if ( u8g->mode == U8G_MODE_R3G3B2 ) 
+  {
+    r &= 0x0e0;
+    g &= 0x0e0;
+    g >>= 3;
+    b >>= 6;
+    u8g->arg_pixel.color = r | g | b;
+  }
+  else if ( u8g->mode == U8G_MODE_HICOLOR )
+  {
+    u8g_SetHiColorByRGB(u8g, r,g,b);
+  }
+  else
+  {
+    u8g->arg_pixel.color = r;
+    u8g->arg_pixel.hi_color = g;
+    u8g->arg_pixel.blue = b;
+  }
+}
+
+
+uint8_t u8g_GetColorIndex(u8g_t *u8g)
+{
+  return u8g->arg_pixel.color;
+}
+
+uint8_t u8g_GetDefaultForegroundColor(u8g_t *u8g)
+{
+  uint8_t mode;
+  mode = u8g_GetMode(u8g);
+  if ( mode == U8G_MODE_R3G3B2 ) 
+    return 255;     /* white */
+  else if ( u8g_GetMode(u8g) == U8G_MODE_GRAY2BIT )
+    return 3;         /* max intensity */
+  else /* if ( u8g.getMode() == U8G_MODE_BW ) */
+    return 1;         /* pixel on */
+  return 1;
+}
+
+void u8g_SetDefaultForegroundColor(u8g_t *u8g)
+{
+  if ( u8g->mode == U8G_MODE_HICOLOR )
+  {
+    u8g->arg_pixel.color = 0x0ff;
+    u8g->arg_pixel.hi_color = 0x0ff;
+  }
+  else
+  {
+    u8g_SetColorIndex(u8g, u8g_GetDefaultForegroundColor(u8g));
+  }
+}
+
+uint8_t u8g_GetDefaultBackgroundColor(u8g_t *u8g)
+{
+  return 0;
+}
+
+void u8g_SetDefaultBackgroundColor(u8g_t *u8g)
+{
+  u8g_SetColorIndex(u8g, u8g_GetDefaultBackgroundColor(u8g));         /* pixel on / black */
+}
+
+uint8_t u8g_GetDefaultMidColor(u8g_t *u8g)
+{
+  uint8_t mode;
+  mode = u8g_GetMode(u8g);
+  if ( mode == U8G_MODE_R3G3B2 ) 
+    return 0x06d;     /* gray: 01101101 */
+  else if ( u8g_GetMode(u8g) == U8G_MODE_GRAY2BIT )
+    return 1;         /* low mid intensity */
+  else /* if ( u8g.getMode() == U8G_MODE_BW ) */
+    return 1;         /* pixel on */
+  return 1;   /* default */
+}
+
+void u8g_SetDefaultMidColor(u8g_t *u8g)
+{
+  u8g_SetColorIndex(u8g, u8g_GetDefaultMidColor(u8g));
+}
+
+
+
+