diff -r 000000000000 -r 88d965579617 components/u8g2/csrc/u8log_u8g2.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/u8g2/csrc/u8log_u8g2.c	Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,98 @@
+/*
+
+  u8log_u8g2.c
+  
+
+  Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
+
+  Copyright (c) 2018, 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 "u8g2.h"
+/*
+  Draw the u8log text at the specified x/y position.
+  x/y position is the reference position of the first char of the first line.
+  the line height is 
+    u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2) + line_height_offset;
+  line_height_offset can be set with u8log_SetLineHeightOffset()
+  Use
+    u8g2_SetFontRefHeightText(u8g2_t *u8g2);
+    u8g2_SetFontRefHeightExtendedText(u8g2_t *u8g2);
+    u8g2_SetFontRefHeightAll(u8g2_t *u8g2);
+  to change the return values for u8g2_GetAscent and u8g2_GetDescent
+
+*/
+void u8g2_DrawLog(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8log_t *u8log)
+{
+  u8g2_uint_t disp_x, disp_y;
+  uint8_t buf_x, buf_y;
+  uint8_t c;
+  
+  disp_y = y;  
+  u8g2_SetFontDirection(u8g2, 0);
+  for( buf_y = 0; buf_y < u8log->height; buf_y++ )
+  {
+    disp_x = x;
+    for( buf_x = 0; buf_x < u8log->width; buf_x++ )
+    {
+      c = u8log->screen_buffer[buf_y * u8log->width + buf_x];
+      disp_x += u8g2_DrawGlyph(u8g2, disp_x, disp_y, c);
+    }
+    disp_y += u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2);
+    disp_y += u8log->line_height_offset;
+  }
+}
+
+/*
+  u8lib callback for u8g2
+  
+  Only font direction 0 is supported: u8g2_SetFontDirection(u8g2, 0)
+  Use
+    u8g2_SetFontRefHeightText(u8g2_t *u8g2);
+    u8g2_SetFontRefHeightExtendedText(u8g2_t *u8g2);
+    u8g2_SetFontRefHeightAll(u8g2_t *u8g2);
+  to change the top offset and the line height and
+    u8log_SetLineHeightOffset(u8log_t *u8log, int8_t line_height_offset)
+  to change the line height.
+  
+*/
+void u8log_u8g2_cb(u8log_t * u8log)
+{
+  u8g2_t *u8g2 = (u8g2_t *)(u8log->aux_data);
+  if ( u8log->is_redraw_line || u8log->is_redraw_all )
+  {
+    u8g2_FirstPage(u8g2);
+    do
+    {
+      u8g2_DrawLog( u8g2, 0, u8g2_GetAscent(u8g2), u8log);
+    }
+    while( u8g2_NextPage(u8g2) );
+  }
+}
+