Revision 0:907c1b097c40, committed 2020-05-31

Comitter:

NoFederation

Date:

Sun May 31 07:57:23 2020 +0000

Commit message:

FILTER

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SSD1327.lib	Sun May 31 07:57:23 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/vart/code/SSD1327/#dae0ebfc0852

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SeeedGrayOLED.cpp	Sun May 31 07:57:23 2020 +0000
@@ -0,0 +1,705 @@
+/*
+ * SeeedGrayOLED.cpp
+ * SSD1327 Gray OLED Driver Library
+ *
+ * Copyright (c) 2011 seeed technology inc.
+ * Author        :   Visweswara R
+ * Create Time   :   Dec 2011
+ * Change Log    :
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+// #include "Arduino.h"
+//#include "Wire.h"
+#include "SeeedGrayOLED.h"
+//#include <pgmspace.h>
+
+#if defined(__arm__) && !defined(PROGMEM)
+  #define PROGMEM
+  #define pgm_read_byte(STR) STR
+#endif
+
+ I2C i2c_oled(PB_9, PB_8);
+//(sda,scl)
+
+// 8x8 Font ASCII 32 - 127 Implemented
+// Users can modify this to support more characters(glyphs)
+// BasicFont is placed in code memory.
+
+// This font can be freely used without any restriction(It is placed in public domain)
+const unsigned char zifu[][16]PROGMEM=
+{
+    
+{0x01,0x00,0x00,0xFF,0x00,0x00,0x00,0xF9,0x49,0x49,0x49,0x49,0x49,0xF9,0x00,0x00},
+{0x00,0x80,0x60,0xF8,0x07,0x00,0x04,0x24,0x24,0x25,0x26,0x24,0x24,0x24,0x04,0x00},/*"信",0*/
+
+};
+
+const unsigned char BasicFont[][8]PROGMEM=
+{
+  {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x00,0x5F,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00},
+  {0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00},
+  {0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00},
+  {0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00},
+  {0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00},
+  {0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00},
+  {0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00},
+  {0x00,0x41,0x22,0x1C,0x00,0x00,0x00,0x00},
+  {0x00,0x08,0x2A,0x1C,0x2A,0x08,0x00,0x00},
+  {0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00},
+  {0x00,0xA0,0x60,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00},
+  {0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00},
+  {0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00},
+  {0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00},
+  {0x00,0x62,0x51,0x49,0x49,0x46,0x00,0x00},
+  {0x00,0x22,0x41,0x49,0x49,0x36,0x00,0x00},
+  {0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00},
+  {0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00},
+  {0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00},
+  {0x00,0x01,0x71,0x09,0x05,0x03,0x00,0x00},
+  {0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00},
+  {0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00},
+  {0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00},
+  {0x00,0x00,0xAC,0x6C,0x00,0x00,0x00,0x00},
+  {0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00},
+  {0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00},
+  {0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x00},
+  {0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00},
+  {0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00},
+  {0x00,0x7E,0x09,0x09,0x09,0x7E,0x00,0x00},
+  {0x00,0x7F,0x49,0x49,0x49,0x36,0x00,0x00},
+  {0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00},
+  {0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00},
+  {0x00,0x7F,0x49,0x49,0x49,0x41,0x00,0x00},
+  {0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00},
+  {0x00,0x3E,0x41,0x41,0x51,0x72,0x00,0x00},
+  {0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00},
+  {0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00},
+  {0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00},
+  {0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00},
+  {0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00},
+  {0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00},
+  {0x00,0x7F,0x04,0x08,0x10,0x7F,0x00,0x00},
+  {0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00},
+  {0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00},
+  {0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00},
+  {0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00},
+  {0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00},
+  {0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00},
+  {0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00},
+  {0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00},
+  {0x00,0x3F,0x40,0x38,0x40,0x3F,0x00,0x00},
+  {0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00},
+  {0x00,0x03,0x04,0x78,0x04,0x03,0x00,0x00},
+  {0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00},
+  {0x00,0x7F,0x41,0x41,0x00,0x00,0x00,0x00},
+  {0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00},
+  {0x00,0x41,0x41,0x7F,0x00,0x00,0x00,0x00},
+  {0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00},
+  {0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00},
+  {0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00},
+  {0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00},
+  {0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00},
+  {0x00,0x38,0x44,0x44,0x28,0x00,0x00,0x00},
+  {0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00},
+  {0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00},
+  {0x00,0x08,0x7E,0x09,0x02,0x00,0x00,0x00},
+  {0x00,0x18,0xA4,0xA4,0xA4,0x7C,0x00,0x00},
+  {0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00},
+  {0x00,0x00,0x7D,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x80,0x84,0x7D,0x00,0x00,0x00,0x00},
+  {0x00,0x7F,0x10,0x28,0x44,0x00,0x00,0x00},
+  {0x00,0x41,0x7F,0x40,0x00,0x00,0x00,0x00},
+  {0x00,0x7C,0x04,0x18,0x04,0x78,0x00,0x00},
+  {0x00,0x7C,0x08,0x04,0x7C,0x00,0x00,0x00},
+  {0x00,0x38,0x44,0x44,0x38,0x00,0x00,0x00},
+  {0x00,0xFC,0x24,0x24,0x18,0x00,0x00,0x00},
+  {0x00,0x18,0x24,0x24,0xFC,0x00,0x00,0x00},
+  {0x00,0x00,0x7C,0x08,0x04,0x00,0x00,0x00},
+  {0x00,0x48,0x54,0x54,0x24,0x00,0x00,0x00},
+  {0x00,0x04,0x7F,0x44,0x00,0x00,0x00,0x00},
+  {0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00},
+  {0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00},
+  {0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00},
+  {0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00},
+  {0x00,0x1C,0xA0,0xA0,0x7C,0x00,0x00,0x00},
+  {0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00},
+  {0x00,0x08,0x36,0x41,0x00,0x00,0x00,0x00},
+  {0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00},
+  {0x00,0x41,0x36,0x08,0x00,0x00,0x00,0x00},
+  {0x00,0x02,0x01,0x01,0x02,0x01,0x00,0x00},
+  {0x00,0x02,0x05,0x05,0x02,0x00,0x00,0x00} 
+};
+
+
+void SeeedGrayOLED::drawzifu(unsigned char Row1, unsigned char Column,const unsigned char *bitmaparray,int bytes)
+{
+     if(Drive_IC == SSD1327)
+  {
+    char localAddressMode = addressingMode;
+    if(addressingMode != HORIZONTAL_MODE)
+    {
+        //Bitmap is drawn in horizontal mode
+        setHorizontalMode();
+    }
+
+    for(int i=0;i<bytes;i++)
+    {
+
+      for(int j=0;j<8;j=j+2) 
+      {
+        char c=0x00;
+        char bit1 = bitmaparray[i] << j  & 0x80;  
+        char bit2 = bitmaparray[i] << (j+1) & 0x80;
+
+        // Each bit is changed to a nibble
+        c|=(bit1)?grayH:0x00;
+        // Each bit is changed to a nibble
+        c|=(bit2)?grayL:0x00;
+        sendData(c);
+     }
+    }
+    if(localAddressMode == VERTICAL_MODE)
+    {
+        //If Vertical Mode was used earlier, restore it.
+        setVerticalMode();
+    }
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    int Row = 0,column_l = 0x00, column_h = 0x11;   
+    setHorizontalMode();
+    for(int i=0;i<bytes;i++)
+    {
+      sendCommand(0xb0 + Row1*2 +Row);
+      sendCommand(column_l);
+      sendCommand(column_h + Column);
+      //sendCommand(0xA7);
+
+ //     byte bits = (byte)pgm_read_byte(&bitmaparray[i]);
+ //     byte tmp = 0x00;
+ 
+        char bits = bitmaparray[i];
+        char tmp = 0x00;
+ 
+      for(int b = 0; b < 8; b++)
+      {
+  //      tmp |= ((bits>>(7-b))&0x01)<<b;
+          tmp |= ((bits>>(7-b))&0x01)<<b;
+      }
+  //    sendData(tmp);
+        sendData(tmp);
+        
+      Row++;
+      if(Row >= 2){
+        Row = 0;
+        column_l++;
+        if(column_l >= 16){
+          column_l = 0x00;
+          column_h += 0x01;
+        }
+      }
+    }
+  }
+
+}
+
+void SeeedGrayOLED::putzifu(unsigned char C)
+{
+    if(C < 32 || C > 127) //Ignore non-printable ASCII characters. This can be modified for multilingual font.
+    {
+        C=' '; //Space
+    }   
+
+    if(Drive_IC == SSD1327)
+  {
+    for(char i=0;i<8;i=i+2)
+    {
+        for(char j=0;j<8;j++)
+        {
+            // Character is constructed two pixel at a time using vertical mode from the default 8x8 font
+            char c=0x00;
+            char bit1= (BasicFont[C-32][i] >> j)  & 0x01;  
+            char bit2= (BasicFont[C-32][i+1] >> j) & 0x01;
+           // Each bit is changed to a nibble
+            c|=(bit1)?grayH:0x00;
+            c|=(bit2)?grayL:0x00;
+
+            sendData(c);
+        }
+    }
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    for(int i=0;i<16;i++)
+    {
+
+        sendData(zifu[C-48][i]); //font array starts at 0, ASCII starts at 32. Hence the translation
+              
+       //read bytes from code memory     
+    }
+  }
+}
+
+void SeeedGrayOLED::setzifuXY(unsigned char Row, unsigned char Column)
+{
+  if(Drive_IC == SSD1327)
+  {
+    //Column Address
+    sendCommand(0x15);             /* Set Column Address */
+    sendCommand(0x08+(Column*4));  /* Start Column: Start from 8 */
+    sendCommand(0x37);             /* End Column */
+    // Row Address
+    sendCommand(0x75);             /* Set Row Address */
+    sendCommand(0x00+(Row*8));     /* Start Row*/
+    sendCommand(0x07+(Row*8));     /* End Row*/
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    uint8_t col_l;
+
+    Column%2 ? col_l = 0x10 : col_l = 0x00;
+    sendCommand(0xb0+Row);
+    sendCommand(col_l);
+    sendCommand(0x11+(Column/2));
+  }
+}
+
+void SeeedGrayOLED::init(int IC)
+{
+  Drive_IC = IC;
+  if(Drive_IC == SSD1327)
+  {
+    sendCommand(0xFD); // Unlock OLED driver IC MCU interface from entering command. i.e: Accept commands
+    sendCommand(0x12);
+    sendCommand(0xAE); // Set display off
+    sendCommand(0xA8); // set multiplex ratio
+    sendCommand(0x5F); // 96
+    sendCommand(0xA1); // set display start line
+    sendCommand(0x00);
+    sendCommand(0xA2); // set display offset
+    sendCommand(0x60);
+    sendCommand(0xA0); // set remap
+    sendCommand(0x46);
+    sendCommand(0xAB); // set vdd internal
+    sendCommand(0x01); //
+    sendCommand(0x81); // set contrasr
+    sendCommand(0x53); // 100 nit
+    sendCommand(0xB1); // Set Phase Length
+    sendCommand(0X51); //
+    sendCommand(0xB3); // Set Display Clock Divide Ratio/Oscillator Frequency
+    sendCommand(0x01);
+    sendCommand(0xB9); //
+    sendCommand(0xBC); // set pre_charge voltage/VCOMH
+    sendCommand(0x08); // (0x08);
+    sendCommand(0xBE); // set VCOMH
+    sendCommand(0X07); // (0x07);
+    sendCommand(0xB6); // Set second pre-charge period
+    sendCommand(0x01); //
+    sendCommand(0xD5); // enable second precharge and enternal vsl
+    sendCommand(0X62); // (0x62);
+    sendCommand(0xA4); // Set Normal Display Mode
+    sendCommand(0x2E); // Deactivate Scroll
+    sendCommand(0xAF); // Switch on display
+    wait(0.1);
+
+    // Row Address
+    sendCommand(0x75);    // Set Row Address 
+    sendCommand(0x00);    // Start 0
+    sendCommand(0x5f);    // End 95 
+
+
+    // Column Address
+    sendCommand(0x15);    // Set Column Address 
+    sendCommand(0x08);    // Start from 8th Column of driver IC. This is 0th Column for OLED 
+    sendCommand(0x37);    // End at  (8 + 47)th column. Each Column has 2 pixels(segments)
+
+    // Init gray level for text. Default:Brightest White
+    grayH= 0xF0;
+    grayL= 0x0F;
+  }
+  else if (Drive_IC ==SH1107G)
+  {
+    sendCommand(0xae);  //Display OFF 
+    sendCommand(0xd5);  // Set Dclk
+    sendCommand(0x50);  // 100Hz
+    sendCommand(0x20);  // Set row address
+    sendCommand(0x81);  // Set contrast control
+    sendCommand(0x80);  
+    sendCommand(0xa0);  // Segment remap
+    sendCommand(0xa4);  // Set Entire Display ON 
+    sendCommand(0xa6);  // Normal display
+    sendCommand(0xad);  // Set external VCC
+    sendCommand(0x80);
+    sendCommand(0xc0);  // Set Common scan direction
+    sendCommand(0xd9);  // Set phase leghth
+    sendCommand(0x1f);
+    sendCommand(0xdb);  // Set Vcomh voltage
+    sendCommand(0x27);
+    sendCommand(0xaf);  //Display ON
+    sendCommand(0xb0);
+    sendCommand(0x00);
+    sendCommand(0x11);
+    }
+}
+
+
+void SeeedGrayOLED::sendCommand(unsigned char command)
+{
+    // Wire.beginTransmission(SeeedGrayOLED_Address); // begin I2C communication
+    // Wire.write(SeeedGrayOLED_Command_Mode);    // Set OLED Command mode
+    // Wire.write(command);
+    // Wire.endTransmission();                    // End I2C communication
+    char cmd[2];
+    cmd[0] = SeeedGrayOLED_Command_Mode;
+    cmd[1] = command;
+
+    i2c_oled.write(SeeedGrayOLED_Address, cmd, 2);
+
+}
+
+void SeeedGrayOLED::setContrastLevel(unsigned char ContrastLevel)
+{
+    sendCommand(SeeedGrayOLED_Set_ContrastLevel_Cmd);
+    sendCommand(ContrastLevel);
+}
+
+void SeeedGrayOLED::setHorizontalMode()
+{
+  if(Drive_IC == SSD1327)
+  {
+    sendCommand(0xA0); // remap to
+    sendCommand(0x42); // horizontal mode
+
+    // Row Address
+    sendCommand(0x75);    // Set Row Address 
+    sendCommand(0x00);    // Start 0
+    sendCommand(0x5f);    // End 95 
+
+    // Column Address
+    sendCommand(0x15);    // Set Column Address 
+    sendCommand(0x08);    // Start from 8th Column of driver IC. This is 0th Column for OLED 
+    sendCommand(0x37);    // End at  (8 + 47)th column. Each Column has 2 pixels(or segments)
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    sendCommand(0xA0);
+    sendCommand(0xC8);
+  }
+}
+
+void SeeedGrayOLED::setVerticalMode()
+{
+  if(Drive_IC == SSD1327)
+  {
+    sendCommand(0xA0); // remap to
+    sendCommand(0x46); // Vertical mode
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    sendCommand(0xA0);
+    sendCommand(0xC0);
+  }
+}
+
+void SeeedGrayOLED::setTextXY(unsigned char Row, unsigned char Column)
+{
+  if(Drive_IC == SSD1327)
+  {
+    //Column Address
+    sendCommand(0x15);             /* Set Column Address */
+    sendCommand(0x08+(Column*4));  /* Start Column: Start from 8 */
+    sendCommand(0x37);             /* End Column */
+    // Row Address
+    sendCommand(0x75);             /* Set Row Address */
+    sendCommand(0x00+(Row*8));     /* Start Row*/
+    sendCommand(0x07+(Row*8));     /* End Row*/
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    uint8_t col_l;
+
+    Column%2 ? col_l = 0x08 : col_l = 0x00;
+    sendCommand(0xb0+Row);
+    sendCommand(col_l);
+    sendCommand(0x11+(Column/2));
+  }
+}
+
+void SeeedGrayOLED::clearDisplay()
+{
+     unsigned char i,j;
+
+  if(Drive_IC == SSD1327)
+  {
+    for(j=0;j<48;j++)
+    {
+        for(i=0;i<96;i++)  //clear all columns
+        {
+            sendData(0x00);
+        }
+    }
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    for(i=0; i<16;i++){
+      sendCommand(0xb0+i);
+      sendCommand(0x0);
+      sendCommand(0x10);
+      for(j=0; j<128;j++){ 
+        sendData(0x00);  
+      }
+    }
+  }
+
+}
+
+void SeeedGrayOLED::sendData(unsigned char Data)
+{
+    // Wire.beginTransmission(SeeedGrayOLED_Address); // begin I2C transmission
+    // Wire.write(SeeedGrayOLED_Data_Mode);            // data mode
+    // Wire.write(Data);
+    // Wire.endTransmission();                    // stop I2C transmission
+    char cmd[2];
+    cmd[0] = SeeedGrayOLED_Data_Mode;
+    cmd[1] = Data;
+
+    i2c_oled.write(SeeedGrayOLED_Address, cmd, 2);
+}
+
+void SeeedGrayOLED::setGrayLevel(unsigned char grayLevel)
+{
+    grayH = (grayLevel << 4) & 0xF0;
+    grayL =  grayLevel & 0x0F;
+}
+
+void SeeedGrayOLED::putChar(unsigned char C)
+{
+    if(C < 32 || C > 127) //Ignore non-printable ASCII characters. This can be modified for multilingual font.
+    {
+        C=' '; //Space
+    }   
+
+    if(Drive_IC == SSD1327)
+  {
+    for(char i=0;i<8;i=i+2)
+    {
+        for(char j=0;j<8;j++)
+        {
+            // Character is constructed two pixel at a time using vertical mode from the default 8x8 font
+            char c=0x00;
+            char bit1= (BasicFont[C-32][i] >> j)  & 0x01;  
+            char bit2= (BasicFont[C-32][i+1] >> j) & 0x01;
+           // Each bit is changed to a nibble
+            c|=(bit1)?grayH:0x00;
+            c|=(bit2)?grayL:0x00;
+
+            sendData(c);
+        }
+    }
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    for(int i=0;i<8;i++)
+    {
+       //read bytes from code memory
+       sendData(BasicFont[C-32][i]); //font array starts at 0, ASCII starts at 32. Hence the translation
+    }
+  }
+}
+
+
+
+void SeeedGrayOLED::putString(const char *String)
+{
+    unsigned char i=0;
+    while(String[i])
+    {
+        putChar(String[i]);     
+        i++;
+    }
+}
+
+unsigned char SeeedGrayOLED::putNumber(long long_num)
+{
+    unsigned char char_buffer[10]="";
+    unsigned char i = 0;
+    unsigned char f = 0;
+
+    if (long_num < 0)
+    {
+        f=1;
+        putChar('-');
+        long_num = -long_num;
+    }
+    else if (long_num == 0)
+    {
+        f=1;
+        putChar('0');
+        return f;
+    }
+
+    while (long_num > 0)
+    {
+        char_buffer[i++] = long_num % 10;
+        long_num /= 10;
+    }
+
+    f=f+i;
+    for(; i > 0; i--)
+    {
+        putChar('0'+ char_buffer[i - 1]);
+    }
+    return f;
+
+}
+
+
+
+void SeeedGrayOLED::drawBitmap(const unsigned char *bitmaparray,int bytes)
+{
+     if(Drive_IC == SSD1327)
+  {
+    char localAddressMode = addressingMode;
+    if(addressingMode != HORIZONTAL_MODE)
+    {
+        //Bitmap is drawn in horizontal mode
+        setHorizontalMode();
+    }
+
+    for(int i=0;i<bytes;i++)
+    {
+
+      for(int j=0;j<8;j=j+2) 
+      {
+        char c=0x00;
+        char bit1 = bitmaparray[i] << j  & 0x80;  
+        char bit2 = bitmaparray[i] << (j+1) & 0x80;
+
+        // Each bit is changed to a nibble
+        c|=(bit1)?grayH:0x00;
+        // Each bit is changed to a nibble
+        c|=(bit2)?grayL:0x00;
+        sendData(c);
+     }
+    }
+    if(localAddressMode == VERTICAL_MODE)
+    {
+        //If Vertical Mode was used earlier, restore it.
+        setVerticalMode();
+    }
+  }
+  else if(Drive_IC == SH1107G)
+  {
+    int Row = 0, column_l = 0x00, column_h = 0x11;
+    setHorizontalMode();
+    for(int i=0;i<bytes;i++)
+    {
+      sendCommand(0xb0 + Row);
+      sendCommand(column_l);
+      sendCommand(column_h);
+ //     byte bits = (byte)pgm_read_byte(&bitmaparray[i]);
+ //     byte tmp = 0x00;
+        char bits = bitmaparray[i];
+        char tmp = 0x00;
+          for(int b = 0; b < 8; b++)
+          {
+      //      tmp |= ((bits>>(7-b))&0x01)<<b;
+              tmp |= ((bits>>(7-b))&0x01)<<b;
+          }
+  //    sendData(tmp);
+        sendData(tmp);
+        Row++;
+        if(Row >= 12)
+        {
+            Row = 0;
+            column_l++;
+            if(column_l >= 16)
+            {
+              column_l = 0x00;
+              column_h += 0x01;
+            }
+        }
+    }
+  }
+
+}
+
+void SeeedGrayOLED::setHorizontalScrollProperties(bool direction,unsigned char startRow, unsigned char endRow,unsigned char startColumn, unsigned char endColumn, unsigned char scrollSpeed)
+{
+    /*
+Use the following defines for 'direction' :
+
+ Scroll_Left            
+ Scroll_Right           
+
+Use the following defines for 'scrollSpeed' :
+
+ Scroll_2Frames     
+ Scroll_3Frames
+ Scroll_4Frames
+ Scroll_5Frames 
+ Scroll_25Frames
+ Scroll_64Frames
+ Scroll_128Frames
+ Scroll_256Frames
+
+*/
+
+    if(Scroll_Right == direction)
+    {
+        //Scroll Right
+        sendCommand(0x27);
+    }
+    else
+    {
+        //Scroll Left  
+        sendCommand(0x26);
+    }
+    sendCommand(0x00);       //Dummmy byte
+    sendCommand(startRow);
+    sendCommand(scrollSpeed);
+    sendCommand(endRow);
+    sendCommand(startColumn+8);
+    sendCommand(endColumn+8);
+    sendCommand(0x00);      //Dummmy byte
+
+}
+
+void SeeedGrayOLED::activateScroll()
+{
+    sendCommand(SeeedGrayOLED_Activate_Scroll_Cmd);
+}
+
+void SeeedGrayOLED::deactivateScroll()
+{
+    sendCommand(SeeedGrayOLED_Dectivate_Scroll_Cmd);
+}
+
+void SeeedGrayOLED::setNormalDisplay()
+{
+    sendCommand(SeeedGrayOLED_Normal_Display_Cmd);
+}
+
+void SeeedGrayOLED::setInverseDisplay()
+{
+    sendCommand(SeeedGrayOLED_Inverse_Display_Cmd);
+}
+SeeedGrayOLED SeeedGrayOled;  // Preinstantiate Objects
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SeeedGrayOLED.h	Sun May 31 07:57:23 2020 +0000
@@ -0,0 +1,113 @@
+/*
+ * SeeedGrayOLED.cpp
+ * SSD1327 Gray OLED Driver Library
+ *
+ * Copyright (c) 2011 seeed technology inc.
+ * Author        :   Visweswara R
+ * Create Time   :   Dec 2011
+ * Change Log    :
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+ 
+#ifndef SeeedGrayOLED_data_H
+#define SeeedGrayOLED_data_H
+
+// SeeedGrayOLED Instruction set addresses
+
+//#include "Arduino.h"
+#include "mbed.h"
+#define SH1107G  1
+#define SSD1327  2
+
+#define VERTICAL_MODE                       01
+#define HORIZONTAL_MODE                     02
+
+// #define SeeedGrayOLED_Address               0x3c
+const int SeeedGrayOLED_Address = 0x3c<<1;
+#define SeeedGrayOLED_Command_Mode          0x80
+#define SeeedGrayOLED_Data_Mode             0x40
+
+#define SeeedGrayOLED_Display_Off_Cmd       0xAE
+#define SeeedGrayOLED_Display_On_Cmd        0xAF
+
+#define SeeedGrayOLED_Normal_Display_Cmd    0xA4
+#define SeeedGrayOLED_Inverse_Display_Cmd   0xA7
+#define SeeedGrayOLED_Activate_Scroll_Cmd   0x2F
+#define SeeedGrayOLED_Dectivate_Scroll_Cmd  0x2E
+#define SeeedGrayOLED_Set_ContrastLevel_Cmd 0x81
+
+#define Scroll_Left             0x00
+#define Scroll_Right            0x01
+
+#define Scroll_2Frames          0x7
+#define Scroll_3Frames          0x4
+#define Scroll_4Frames          0x5
+#define Scroll_5Frames          0x0
+#define Scroll_25Frames         0x6
+#define Scroll_64Frames         0x1
+#define Scroll_128Frames        0x2
+#define Scroll_256Frames        0x3
+
+
+class SeeedGrayOLED {
+
+public:
+
+char addressingMode;
+
+void init(int IC);
+
+void setNormalDisplay();
+void setInverseDisplay();
+
+void sendCommand(unsigned char command);
+void sendData(unsigned char Data);
+void setGrayLevel(unsigned char grayLevel);
+
+void setVerticalMode();
+void setHorizontalMode();
+
+void setTextXY(unsigned char Row, unsigned char Column);
+void setzifuXY(unsigned char Row, unsigned char Column);
+void clearDisplay();
+void setContrastLevel(unsigned char ContrastLevel);
+void putChar(unsigned char c);
+void putzifu(unsigned char c);
+void putString(const char *String);
+unsigned char putNumber(long n);
+unsigned char putFloat(float floatNumber,unsigned char decimal);
+unsigned char putFloat(float floatNumber);
+
+void drawBitmap(const unsigned char *bitmaparray,int bytes);
+void drawzifu(unsigned char Row, unsigned char Column,const unsigned char *bitmaparray,int bytes);
+
+void setHorizontalScrollProperties(bool direction,unsigned char startRow, unsigned char endRow,unsigned char startColumn, unsigned char endColumn, unsigned char scrollSpeed);
+void activateScroll();
+void deactivateScroll();
+
+private:
+
+unsigned char grayH;
+unsigned char grayL;
+int Drive_IC;
+
+};
+
+extern SeeedGrayOLED myOLED;  // SeeedGrayOLED object 
+
+#endif
+
+