Diff: u8glibARM/u8g_com_api.c

Revision:

0:d8f4c441e032

Child:

1:0e75de2a5d21

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/u8glibARM/u8g_com_api.c	Fri Jun 10 15:20:20 2016 +0000
@@ -0,0 +1,174 @@
+/*
+
+  u8g_com_api.c
+
+  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"
+
+uint8_t u8g_InitCom(u8g_t *u8g, u8g_dev_t *dev, uint8_t clk_cycle_time)
+{
+  return dev->com_fn(u8g, U8G_COM_MSG_INIT, clk_cycle_time, NULL);
+}
+
+void u8g_StopCom(u8g_t *u8g, u8g_dev_t *dev)
+{
+  dev->com_fn(u8g, U8G_COM_MSG_STOP, 0, NULL);
+}
+
+/* cs contains the chip number, which should be enabled */
+void u8g_SetChipSelect(u8g_t *u8g, u8g_dev_t *dev, uint8_t cs)
+{
+  dev->com_fn(u8g, U8G_COM_MSG_CHIP_SELECT, cs, NULL);
+}
+
+void u8g_SetResetLow(u8g_t *u8g, u8g_dev_t *dev)
+{
+  dev->com_fn(u8g, U8G_COM_MSG_RESET, 0, NULL);
+}
+
+void u8g_SetResetHigh(u8g_t *u8g, u8g_dev_t *dev)
+{
+  dev->com_fn(u8g, U8G_COM_MSG_RESET, 1, NULL);
+}
+
+
+void u8g_SetAddress(u8g_t *u8g, u8g_dev_t *dev, uint8_t address)
+{
+  dev->com_fn(u8g, U8G_COM_MSG_ADDRESS, address, NULL);
+}
+
+uint8_t u8g_WriteByte(u8g_t *u8g, u8g_dev_t *dev, uint8_t val)
+{
+  return dev->com_fn(u8g, U8G_COM_MSG_WRITE_BYTE, val, NULL);
+}
+
+uint8_t u8g_WriteSequence(u8g_t *u8g, u8g_dev_t *dev, uint8_t cnt, uint8_t *seq)
+{
+  return dev->com_fn(u8g, U8G_COM_MSG_WRITE_SEQ, cnt, seq);
+}
+
+uint8_t u8g_WriteSequenceP(u8g_t *u8g, u8g_dev_t *dev, uint8_t cnt, const uint8_t *seq)
+{
+  return dev->com_fn(u8g, U8G_COM_MSG_WRITE_SEQ_P, cnt, (void *)seq);
+}
+
+/*
+  sequence := { direct_value | escape_sequence }
+  direct_value := 0..254
+  escape_sequence := value_255 | sequence_end | delay | adr | cs | not_used 
+  value_255 := 255 255
+  sequence_end = 255 254
+  delay := 255 0..127
+  adr := 255 0x0e0 .. 0x0ef 
+  cs := 255 0x0d0 .. 0x0df 
+  not_used := 255 101..254
+
+#define U8G_ESC_DLY(x) 255, ((x) & 0x7f)
+#define U8G_ESC_CS(x) 255, (0xd0 | ((x)&0x0f))
+#define U8G_ESC_ADR(x) 255, (0xe0 | ((x)&0x0f))
+#define U8G_ESC_VCC(x) 255, (0xbe | ((x)&0x01))
+#define U8G_ESC_END 255, 254
+#define U8G_ESC_255 255, 255
+#define U8G_ESC_RST(x) 255, (0xc0 | ((x)&0x0f))
+
+*/
+uint8_t u8g_WriteEscSeqP(u8g_t *u8g, u8g_dev_t *dev, const uint8_t *esc_seq)
+{
+  uint8_t is_escape = 0;
+  uint8_t value;
+  for(;;)
+  {
+    value = u8g_pgm_read(esc_seq);
+    if ( is_escape == 0 )
+    {
+      if ( value != 255 )
+      {
+        if ( u8g_WriteByte(u8g, dev, value) == 0 )
+          return 0;
+      }
+      else
+      {
+        is_escape = 1;
+      }
+    }
+    else
+    {
+      if ( value == 255 )
+      {
+        if ( u8g_WriteByte(u8g, dev, value) == 0 )
+          return 0;
+      }
+      else if ( value == 254 )
+      {
+        break;
+      }
+      else if ( value >= 0x0f0 )
+      {
+        /* not yet used, do nothing */
+      }
+      else if ( value >= 0xe0  )
+      {
+        u8g_SetAddress(u8g, dev, value & 0x0f);
+      }
+      else if ( value >= 0xd0 )
+      {
+        u8g_SetChipSelect(u8g, dev, value & 0x0f);
+      }
+      else if ( value >= 0xc0 )
+      {
+        u8g_SetResetLow(u8g, dev);
+        value &= 0x0f;
+        value <<= 4;
+        value+=2;
+        u8g_Delay(value);
+        u8g_SetResetHigh(u8g, dev);
+        u8g_Delay(value);
+      }
+      else if ( value >= 0xbe )
+      {
+	/* not yet implemented */
+        /* u8g_SetVCC(u8g, dev, value & 0x01); */
+      }
+      else if ( value <= 127 )
+      {
+        u8g_Delay(value);
+      }
+      is_escape = 0;
+    }
+    esc_seq++;
+  }
+  return 1;
+}
+
+