Create Oled - the display driver

Author: co sto

Oled - the display driver

@@ -0,0 +1,191 @@
+//  
+//==========================================================//
+// Resets display depending on the actual mode.
+static void reset_display(void)
+{
+  displayOff();
+  clear_display();
+  displayOn();
+}
+
+
+
+//==========================================================//
+// Turns display on.
+void displayOn(void)
+{
+  sendcommand(0xaf);        //display on
+}
+
+//==========================================================//
+// Turns display off.
+void displayOff(void)
+{
+  sendcommand(0xae);		//display off
+}
+
+//==========================================================//
+// Clears the display by sendind 0 to all the screen map.
+static void clear_display(void)
+{
+  unsigned char i,k;
+  for(k=0;k<8;k++)
+  {	
+    setXY(k,0);    
+    {
+      for(i=0;i<128;i++)     //clear all COL
+      {
+        SendChar(0);         //clear all COL
+        //delay(10);
+      }
+    }
+  }
+}
+
+
+
+//==========================================================//
+// Actually this sends a byte, not a char to draw in the display. 
+// Display's chars uses 8 byte font the small ones and 96 bytes
+// for the big number font.
+static void SendChar(unsigned char data) 
+{
+  //if (interrupt && !doing_menu) return;   // Stop printing only if interrupt is call but not in button functions
+  
+  Wire.beginTransmission(OLED_address); // begin transmitting
+  Wire.write(0x40);//data mode
+  Wire.write(data);
+  Wire.endTransmission();    // stop transmitting
+}
+
+//==========================================================//
+// Prints a display char (not just a byte) in coordinates X Y,
+// being multiples of 8. This means we have 16 COLS (0-15) 
+// and 8 ROWS (0-7).
+static void sendCharXY(unsigned char data, int X, int Y)
+{
+  setXY(X, Y);
+  Wire.beginTransmission(OLED_address); // begin transmitting
+  Wire.write(0x40);//data mode
+  
+  for(int i=0;i<8;i++)
+    Wire.write(pgm_read_byte(myFont[data-0x20]+i));
+    
+  Wire.endTransmission();    // stop transmitting
+}
+
+//==========================================================//
+// Used to send commands to the display.
+static void sendcommand(unsigned char com)
+{
+  Wire.beginTransmission(OLED_address);     //begin transmitting
+  Wire.write(0x80);                          //command mode
+  Wire.write(com);
+  Wire.endTransmission();                    // stop transmitting
+}
+
+//==========================================================//
+// Set the cursor position in a 16 COL * 8 ROW map.
+static void setXY(unsigned char row,unsigned char col)
+{
+  sendcommand(0xb0+row);                //set page address
+  sendcommand(0x00+(8*col&0x0f));       //set low col address
+  sendcommand(0x10+((8*col>>4)&0x0f));  //set high col address
+}
+
+
+//==========================================================//
+// Prints a string regardless the cursor position.
+static void sendStr(unsigned char *string)
+{
+  unsigned char i=0;
+  while(*string)
+  {
+    for(i=0;i<8;i++)
+    {
+      SendChar(pgm_read_byte(myFont[*string-0x20]+i));
+    }
+    *string++;
+  }
+}
+
+//==========================================================//
+// Prints a string in coordinates X Y, being multiples of 8.
+// This means we have 16 COLS (0-15) and 8 ROWS (0-7).
+static void sendStrXY( char *string, int X, int Y)
+{
+  setXY(X,Y);
+  unsigned char i=0;
+  while(*string)
+  {
+    for(i=0;i<8;i++)
+    {
+      SendChar(pgm_read_byte(myFont[*string-0x20]+i));
+    }
+    *string++;
+  }
+}
+
+
+//==========================================================//
+// Inits oled and draws logo at startup
+static void init_OLED(void)
+{
+  sendcommand(0xae);		//display off
+  sendcommand(0xa6);            //Set Normal Display (default)
+    // Adafruit Init sequence for 128x64 OLED module
+    sendcommand(0xAE);             //DISPLAYOFF
+    sendcommand(0xD5);            //SETDISPLAYCLOCKDIV
+    sendcommand(0x80);            // the suggested ratio 0x80
+    sendcommand(0xA8);            //SSD1306_SETMULTIPLEX
+    sendcommand(0x3F);
+    sendcommand(0xD3);            //SETDISPLAYOFFSET
+    sendcommand(0x0);             //no offset
+    sendcommand(0x40 | 0x0);      //SETSTARTLINE
+    sendcommand(0x8D);            //CHARGEPUMP
+    sendcommand(0x14);
+    sendcommand(0x20);             //MEMORYMODE
+    sendcommand(0x00);             //0x0 act like ks0108
+    
+    //sendcommand(0xA0 | 0x1);      //SEGREMAP   //Rotate screen 180 deg
+    sendcommand(0xA0);
+    
+    //sendcommand(0xC8);            //COMSCANDEC  Rotate screen 180 Deg
+    sendcommand(0xC0);
+    
+    sendcommand(0xDA);            //0xDA
+    sendcommand(0x12);           //COMSCANDEC
+    sendcommand(0x81);           //SETCONTRAS
+    sendcommand(0xCF);           //
+    sendcommand(0xd9);          //SETPRECHARGE 
+    sendcommand(0xF1); 
+    sendcommand(0xDB);        //SETVCOMDETECT                
+    sendcommand(0x40);
+    sendcommand(0xA4);        //DISPLAYALLON_RESUME        
+    sendcommand(0xA6);        //NORMALDISPLAY             
+
+  clear_display();
+  sendcommand(0x2e);            // stop scroll
+  //----------------------------REVERSE comments----------------------------//
+    sendcommand(0xa0);		//seg re-map 0->127(default)
+    sendcommand(0xa1);		//seg re-map 127->0
+    sendcommand(0xc8);
+    delay(1000);
+  //----------------------------REVERSE comments----------------------------//
+  // sendcommand(0xa7);  //Set Inverse Display  
+  // sendcommand(0xae);		//display off
+  sendcommand(0x20);            //Set Memory Addressing Mode
+  sendcommand(0x00);            //Set Memory Addressing Mode ab Horizontal addressing mode
+  //  sendcommand(0x02);         // Set Memory Addressing Mode ab Page addressing mode(RESET)  
+  
+   setXY(0,0);
+  
+ // for(int i=0;i<128*8;i++)     // show 128* 64 Logo
+ // {
+ //   SendChar(pgm_read_byte(logo+i));
+ // }
+  sendcommand(0xaf);		//display on
+  
+  //sendStrXY("Miker",7,5);
+  delay(5000); 
+}