Diff: u8g_com_api_16gr.c

Revision:

0:972874f31c98

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/u8g_com_api_16gr.c	Wed Mar 07 12:49:14 2018 +0000
@@ -0,0 +1,95 @@
+/*
+
+  u8g_com_api_16gr.c
+  
+  Extension of the com api for devices with 16 graylevels (4 bit per pixel).
+  This should fit to the 8h and 16h architectures (pb8v1, pb8v2, pb16v1, pb16v2), 
+  mainly intended for SSD OLEDs
+
+  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"
+
+/* interpret b as a monochrome bit pattern, write value 15 for high bit and value 0 for a low bit */
+/* topbit (msb) is sent last */
+/* example: b = 0x083 will send 0xff, 0x00, 0x00, 0xf0 */
+uint8_t u8g_WriteByteBWTo16GrDevice(u8g_t *u8g, u8g_dev_t *dev, uint8_t b)
+{
+  static uint8_t buf[4];
+  static uint8_t map[4] = { 0, 0x00f, 0x0f0, 0x0ff };
+  buf [3] = map[b & 3];
+  b>>=2;
+  buf [2] = map[b & 3];
+  b>>=2;
+  buf [1] = map[b & 3];
+  b>>=2;
+  buf [0] = map[b & 3];
+  return dev->com_fn(u8g, U8G_COM_MSG_WRITE_SEQ, 4, buf);
+}
+
+uint8_t u8g_WriteSequenceBWTo16GrDevice(u8g_t *u8g, u8g_dev_t *dev, uint8_t cnt, uint8_t *ptr)
+{
+  do
+  {
+    if ( u8g_WriteByteBWTo16GrDevice(u8g, dev, *ptr++) == 0 )
+      return 0;
+    cnt--;
+  } while( cnt != 0 );
+  return 1;
+}
+
+/* interpret b as a 4L bit pattern, write values 0x000, 0x004, 0x008, 0x00c */
+uint8_t u8g_WriteByte4LTo16GrDevice(u8g_t *u8g, u8g_dev_t *dev, uint8_t b)
+{
+  //static uint8_t map[16] = { 0x000, 0x004, 0x008, 0x00c, 0x040, 0x044, 0x048, 0x04c, 0x080, 0x084, 0x088, 0x08c, 0x0c0, 0x0c4, 0x0c8, 0x0cc};
+  //static uint8_t map[16] = { 0x000, 0x004, 0x00a, 0x00f, 0x040, 0x044, 0x04a, 0x04f, 0x0a0, 0x0a4, 0x0aa, 0x0af, 0x0f0, 0x0f4, 0x0fa, 0x0ff};
+  static uint8_t map[16] = { 0x000, 0x040, 0x0a0, 0x0f0, 0x004, 0x044, 0x0a4, 0x0f4, 0x00a, 0x04a, 0x0aa, 0x0fa, 0x00f, 0x04f, 0x0af, 0x0ff};
+  uint8_t bb;
+  bb = b;
+  bb &= 15;
+  b>>=4;
+  dev->com_fn(u8g, U8G_COM_MSG_WRITE_BYTE, map[bb], NULL);
+  return dev->com_fn(u8g, U8G_COM_MSG_WRITE_BYTE, map[b], NULL);
+}
+
+uint8_t u8g_WriteSequence4LTo16GrDevice(u8g_t *u8g, u8g_dev_t *dev, uint8_t cnt, uint8_t *ptr)
+{
+  do
+  {
+    if ( u8g_WriteByte4LTo16GrDevice(u8g, dev, *ptr++) == 0 )
+      return 0;
+    cnt--;
+  } while( cnt != 0 );
+  return 1;
+}
+