Displays distance to start location on OLED screen.

Dependencies:   mbed

Revision:
0:972874f31c98
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/u8g_dev_flipdisc_2x7.c	Wed Mar 07 12:49:14 2018 +0000
@@ -0,0 +1,93 @@
+/*
+
+  u8g_dev_flipdisc.c
+  
+  1-Bit (BW) Driver for flip disc matrix
+  2x 7 pixel height
+
+  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 28
+#define HEIGHT 14
+#define PAGE_HEIGHT 14
+
+/*
+  Write data to the flip disc matrix.
+  This procedure must be implemented by the user.
+  Arguments:
+    id:	Id for the matrix. Currently always 0.
+    page: 	A page has a height of 14 pixel. For a matrix with HEIGHT == 14 this will be always 0
+    width: 	The width of the flip disc matrix. Always equal to WIDTH
+    row1: 	first data line (7 pixel per byte)
+    row2: 	first data line (7 pixel per byte)
+*/
+void writeFlipDiscMatrix(uint8_t id, uint8_t page, uint8_t width, uint8_t *row1, uint8_t *row2);
+
+
+
+void (*u8g_write_flip_disc_matrix)(uint8_t id, uint8_t page, uint8_t width, uint8_t *row1, uint8_t *row2);
+
+void u8g_SetFlipDiscCallback(u8g_t *u8g, void (*cb)(uint8_t id, uint8_t page, uint8_t width, uint8_t *row1, uint8_t *row2))
+{
+  u8g_write_flip_disc_matrix = cb;
+}
+
+uint8_t u8g_dev_flipdisc_2x7_bw_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
+{
+  switch(msg)
+  {
+    case U8G_DEV_MSG_INIT:
+      break;
+    case U8G_DEV_MSG_STOP:
+      break;
+    case U8G_DEV_MSG_PAGE_NEXT:
+      {
+        u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
+        
+	/* current page: pb->p.page */
+	/* ptr to the buffer: pb->buf */
+	
+	(*u8g_write_flip_disc_matrix)(0, pb->p.page, WIDTH, pb->buf, (uint8_t *)(pb->buf)+WIDTH);
+      }
+      break;
+    case U8G_DEV_MSG_CONTRAST:
+      return 1;
+  }
+  return u8g_dev_pb14v1_base_fn(u8g, dev, msg, arg);
+}
+
+uint8_t u8g_dev_flipdisc_2x7_bw_buf[WIDTH*2] U8G_NOCOMMON ; 
+u8g_pb_t u8g_dev_flipdisc_2x7_bw_pb = { {16, HEIGHT, 0, 0, 0},  WIDTH, u8g_dev_flipdisc_2x7_bw_buf}; 
+u8g_dev_t u8g_dev_flipdisc_2x7 = { u8g_dev_flipdisc_2x7_bw_fn, &u8g_dev_flipdisc_2x7_bw_pb, u8g_com_null_fn };
+