File content as of revision 0:94c1a94c5a47:

//
// SSD1306Z LCD Driver: 0.96" lcd LY096BG30
//
// Interface: I2C
// pin1: Vcc
// pin2: Gnd
// pin3: SCL
// pin4: SDA

#include "mbed.h"
#include "I2C_SSD1306Z.h"
#include "Font8x16.h"
#include "Font5x7.h"


//I2C i2c(I2C_SDA, I2C_SCL);
extern I2C i2c;

char DisplayBuffer[128*8];

#if 1

void lcdWriteCommand(uint8_t lcd_Command)
{
	
	   char data[2];
	   data[0]=0x0;
	   data[1]=lcd_Command;
    // I2C_writeBytes(LCD_I2C_PORT, LCD_I2C_SLA, 0x00, 1, data);
	// i2c_write_data_block(LCD_I2C_SLA, 0x00, data,1);
	   i2c.write(LCD_I2C_SLA, data, 2, 0);
	 
}

void lcdWriteData(uint8_t lcd_Data)
{
	
	char data[2];
	data[0]=0x40;
	data[1]=lcd_Data;
   //  I2C_writeBytes(LCD_I2C_PORT, LCD_I2C_SLA, 0x40, 1, data);	
	//i2c_write_data_block(LCD_I2C_SLA, 0x40,data,1);
	i2c.write(LCD_I2C_SLA, data, 2, 0);
}

#else

void lcdWriteCommand(uint8_t lcd_Command)
{
	   uint8_t data[1];
	   data[0]=lcd_Command;
    // I2C_writeBytes(LCD_I2C_PORT, LCD_I2C_SLA, 0x00, 1, data);
	 i2c_write_data_block(LCD_I2C_SLA, 0x00, data,1);
	 
}

void lcdWriteData(uint8_t lcd_Data)
{
	uint8_t data[1];
	   data[0]=lcd_Data;
   //  I2C_writeBytes(LCD_I2C_PORT, LCD_I2C_SLA, 0x40, 1, data);	
	i2c_write_data_block(LCD_I2C_SLA, 0x40,data,1);
}

#endif

void lcdSetAddr(uint8_t column, uint8_t page)
{
	lcdWriteCommand(0xb0+page);                     // set page address
	lcdWriteCommand(0x10 | ((column & 0xf0) >> 4)); // set column address MSB
	lcdWriteCommand(0x00 |  (column & 0x0f)      ); // set column address LSB
}

void Init_LCD(void)
{
	lcdWriteCommand(0xae); //display off
	lcdWriteCommand(0x20);	//Set Memory Addressing Mode	
	lcdWriteCommand(0x10);	//00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
	lcdWriteCommand(0xb0);	//Set Page Start Address for Page Addressing Mode,0-7
	lcdWriteCommand(0xc8);	//Set COM Output Scan Direction
	lcdWriteCommand(0x00);//---set low column address
	lcdWriteCommand(0x10);//---set high column address
	lcdWriteCommand(0x40);//--set start line address
	lcdWriteCommand(0x81);//--set contrast control register
	lcdWriteCommand(0x7f);
	lcdWriteCommand(0xa1);//--set segment re-map 0 to 127
	lcdWriteCommand(0xa6);//--set normal display
	lcdWriteCommand(0xa8);//--set multiplex ratio(1 to 64)
	lcdWriteCommand(0x3F);//
	lcdWriteCommand(0xa4);//0xa4,Output follows RAM content;0xa5,Output ignores RAM content
	lcdWriteCommand(0xd3);//-set display offset
	lcdWriteCommand(0x00);//-not offset
	lcdWriteCommand(0xd5);//--set display clock divide ratio/oscillator frequency
	lcdWriteCommand(0xf0);//--set divide ratio
	lcdWriteCommand(0xd9);//--set pre-charge period
	lcdWriteCommand(0x22); //
	lcdWriteCommand(0xda);//--set com pins hardware configuration
	lcdWriteCommand(0x12);
	lcdWriteCommand(0xdb);//--set vcomh
	lcdWriteCommand(0x20);//0x20,0.77xVcc
	lcdWriteCommand(0x8d);//--set DC-DC enable
	lcdWriteCommand(0x14);//
	lcdWriteCommand(0xaf);//--turn on lcd panel 
}

void clear_LCD(void)
{
	int16_t x, Y;
	for (Y=0;Y<LCD_Ymax/8;Y++) 
	{
		lcdSetAddr(0, Y);
	  for (x=0;x<LCD_Xmax;x++)
	     lcdWriteData(0x00);
	}
}

// print char function using Font5x7
void printC_5x7 (int16_t x, int16_t y, unsigned char ascii_code) 
{
	uint8_t i;
	if (x<(LCD_Xmax-5) && y<(LCD_Ymax-7)) {
	   if      (ascii_code<0x20) ascii_code=0x20;
     else if (ascii_code>0x7F) ascii_code=0x20;
	   for (i=0;i<5;i++) {
			  lcdSetAddr((LCD_Xmax+1-x-i), (y/8)); 
        lcdWriteData(Font5x7[(ascii_code-0x20)*5+5-i]);
		 }
	}
}

void print_C(uint8_t Line, uint8_t Col, char ascii)
{
	uint8_t j, i, tmp;	
	for (j=0;j<2;j++) {		
	    lcdSetAddr(Col*8, Line*2+j);
	    for (i=0;i<8;i++) {
	      tmp=Font8x16[(ascii-0x20)*16+j*8+i];
	      lcdWriteData(tmp);
		  }
  }
}

void print_Line(uint8_t line, char text[])
{
	uint8_t Col;
	  for (Col=0; Col<strlen(text); Col++) 
			print_C(line, Col, text[Col]);
}

void printS(int16_t x, int16_t y, char text[])
{
	int8_t i;
	for (i=0;i<strlen(text);i++) 
		print_C(x+i*8, y,text[i]);
}

void printS_5x7(int16_t x, int16_t y, char text[])
{
	uint8_t i;
	for (i=0;i<strlen(text);i++) {
		printC_5x7(x,y,text[i]);
	  x=x+5;
	}
}

void draw_Pixel(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor)
{
	if (fgColor!=0) 
		DisplayBuffer[x+y/8*LCD_Xmax] |= (0x01<<(y%8));
	else 
		DisplayBuffer[x+y/8*LCD_Xmax] &= (0xFE<<(y%8));

	lcdSetAddr(x, y/8);
	lcdWriteData(DisplayBuffer[x+y/8*LCD_Xmax]);
}

void draw_Bmp8x8(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,k, kx,ky;
	if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check		
		 for (i=0;i<8;i++){
			   kx=x+i;
				 t=bitmap[i];					 
				 for (k=0;k<8;k++) {
					      ky=y+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
				}
		 }
}

void draw_Bmp32x8(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,k, kx,ky;
	if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check		
		 for (i=0;i<32;i++){
			   kx=x+i;
				 t=bitmap[i];					 
				 for (k=0;k<8;k++) {
					      ky=y+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
				}
		 }
}

void draw_Bmp120x8(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,k, kx,ky;
	if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check		
		 for (i=0;i<120;i++){
			   kx=x+i;
				 t=bitmap[i];					 
				 for (k=0;k<8;k++) {
					      ky=y+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
				}
		 }
}

void draw_Bmp8x16(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,k, kx,ky;
	if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check		
		 for (i=0;i<8;i++){
			   kx=x+i;
				 t=bitmap[i];					 
				 for (k=0;k<8;k++) {
					      ky=y+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
				}
				 t=bitmap[i+8];					 
				 for (k=0;k<8;k++) {
					      ky=y+k+8;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
				}				 
		 }
}

void draw_Bmp16x8(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,k,kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-7)) // boundary check
		 for (i=0;i<16;i++)
	   {
			   kx=x+i;
				 t=bitmap[i];					 
				 for (k=0;k<8;k++) {
					      ky=y+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
					}
		 }
}

void draw_Bmp16x16(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,j,k, kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-15)) // boundary check
	   for (j=0;j<2; j++){		 
		     for (i=0;i<16;i++) {	
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}
		     }
		 }
}

void draw_Bmp16x24(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,j,k, kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-15)) // boundary check
	   for (j=0;j<3; j++){		 
		     for (i=0;i<16;i++) {	
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}
		     }
		 }
}

void draw_Bmp16x32(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t, i,j,k, kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-31)) // boundary check
	   for (j=0;j<4; j++)	{			 
		     for (i=0;i<16;i++) {
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}					 
		     }		 
		 }
}

void draw_Bmp16x40(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t, i,j,k, kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-31)) // boundary check
	   for (j=0;j<5; j++)	{			 
		     for (i=0;i<16;i++) {
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}					 
		     }		 
		 }
}

void draw_Bmp16x48(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,j,k,kx,ky;
	if (x<(LCD_Xmax-15) && y<(LCD_Ymax-47)) // boundary check
	   for (j=0;j<6; j++)	{
         k=x;			 
		     for (i=0;i<16;i++) {
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}						 
		     }		 
		 }
}

void draw_Bmp16x64(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,j,k,kx,ky;
	if (x<(LCD_Xmax-15) && y==0) // boundary check
	   for (j=0;j<8; j++) {
				 k=x;
		     for (i=0;i<16;i++) {
            kx=x+i;
					  t=bitmap[i+j*16];					 
					  for (k=0;k<8;k++) {
					      ky=y+j*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}						 
		     }
		 }
}

void draw_Bmp32x16(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,jx,jy,k,kx,ky;
	if (x<(LCD_Xmax-31) && y<(LCD_Ymax-15)) // boundary check
		for (jy=0;jy<2;jy++)
	   for (jx=0;jx<2;jx++)	{
			   k=x;
		     for (i=0;i<16;i++) {
            kx=x+jx*16+i;
					  t=bitmap[i+jx*16+jy*32];					 
					  for (k=0;k<8;k++) {
					      ky=y+jy*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}						 
		     }
			}
}

void draw_Bmp32x32(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,jx,jy,k, kx,ky;
	if (x<(LCD_Xmax-31) && y<(LCD_Ymax-31)) // boundary check
		for (jy=0;jy<4;jy++)
	   for (jx=0;jx<2;jx++)	{
			   k=x;
		     for (i=0;i<16;i++) {
            kx=x+jx*16+i;
					  t=bitmap[i+jx*16+jy*32];					 
					  for (k=0;k<8;k++) {
					      ky=y+jy*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}						 
		     }
			}
}

void draw_Bmp32x48(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,jx,jy,k, kx,ky;
	if (x<(LCD_Xmax-31) && y<(LCD_Ymax-47)) // boundary check
		for (jy=0;jy<6;jy++)
	   for (jx=0;jx<2;jx++)	{
			   k=x;
		     for (i=0;i<16;i++) {
					  kx=x+jx*16+i;
					  t=bitmap[i+jx*16+jy*32];					 
					  for (k=0;k<8;k++) {
					      ky=y+jy*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}	
		     }		 
		 }
}

void draw_Bmp32x64(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t,i,jx,jy,k, kx,ky;
	if (x<(LCD_Xmax-31) && y==0) // boundary check
		for (jy=0;jy<8;jy++)
	   for (jx=0;jx<2;jx++)	{
			   k=x;
		     for (i=0;i<16;i++) {
					  kx=x+jx*16+i;
					  t=bitmap[i+jx*16+jy*32];					 
					  for (k=0;k<8;k++) {
					      ky=y+jy*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}						 
		     }
			}				 
}

void draw_Bmp64x64(int16_t x, int16_t y, uint16_t fgColor, uint16_t bgColor, unsigned char bitmap[])
{
	uint8_t t, i,jx,jy,k, kx,ky;
	if (x<(LCD_Xmax-63) && y==0) // boundary check
		for (jy=0;jy<8;jy++)
	   for (jx=0;jx<4;jx++)	{
	       k=x;
		     for (i=0;i<16;i++) {
					  kx=x+jx*16+i;
					  t=bitmap[i+jx*16+jy*64];					 
					  for (k=0;k<8;k++) {
					      ky=y+jy*8+k;
					      if (t&(0x01<<k)) draw_Pixel(kx,ky,fgColor,bgColor);
						}					 
		     }
			}
}

void draw_LCD(unsigned char *buffer)
{
  uint8_t x,y;
	for (x=0; x<LCD_Xmax; x++) {
    	for (y=0; y<(LCD_Ymax/8); y++) {
			   lcdSetAddr(x ,y);
			   lcdWriteData(buffer[x+y*LCD_Xmax]);
			}
		}			
}