/*		COLORS				*/

#define		BLACK	0xFFFF
#define		WHITE	0x0000
#define		GREY	0xF800
#define		GREEN	0x7E0


/*		Comand-Pins			*/

#define LCD_CS_BIT      2
#define LCD_RS_BIT      3
#define LCD_WR_BIT      4
#define LCD_RD_BIT      5
#define LCD_RESET_BIT   6


/*		Set Comand-Pins		*/

#define LCD_CS_LOW      PORTE.OUT &= ~(1 << LCD_CS_BIT)
#define LCD_CS_HIGH     PORTE.OUT |= 1 << LCD_CS_BIT

#define LCD_RS_LOW      PORTE.OUT &= ~(1 << LCD_RS_BIT)
#define LCD_RS_HIGH     PORTE.OUT |= 1 << LCD_RS_BIT

#define LCD_WR_LOW      PORTE.OUT &= ~(1 << LCD_WR_BIT)
#define LCD_WR_HIGH     PORTE.OUT |= 1 << LCD_WR_BIT

#define LCD_RD_LOW      PORTE.OUT &= ~(1 << LCD_RD_BIT)
#define LCD_RD_HIGH     PORTE.OUT |= 1 << LCD_RD_BIT

#define LCD_RESET_LOW	PORTD.OUT &= ~(1 << LCD_RESET_BIT)
#define LCD_RESET_HIGH	PORTD.OUT |= 1 << LCD_RESET_BIT


/*		Data-Pins			*/
#define LCD_DATA_PORT   PORTB.OUT
#define LCD_DATA_PIN    PORTB.IN
#define LCD_DATA_OUT    PORTB.DIR = 0xFF
#define LCD_DATA_IN    PORTB.DIR = 0


/********************************************/
void LCD_WR_Trigger()
{
	_delay_us(1);
	LCD_WR_LOW;
	_delay_us(1);
	LCD_WR_HIGH;
}

/********************************************/
uint8_t LCD_RD_Trigger()
{
	_delay_us(1);
	LCD_RD_LOW;
	uint8_t value = LCD_DATA_PIN;
	_delay_us(1);
	LCD_RD_HIGH;
	return value;
}

/********************************************/
uint16_t LCD_RD_Trigger16()		// 16bit
{
	uint16_t value = LCD_RD_Trigger() * 256;
	value += LCD_RD_Trigger();
	return value;
}

/********************************************/
void LCD_WriteCMD (uint8_t value)
{
	LCD_RS_LOW;    /*  DC low: command   DC high: data  */
	LCD_CS_LOW;
	LCD_DATA_PORT = value;
	LCD_WR_Trigger();
	LCD_CS_HIGH;
}

/********************************************/
void LCD_WriteData (uint8_t value)
{
	LCD_RS_HIGH;       /*  DC low: command   DC high: data  */
	LCD_CS_LOW;
	LCD_DATA_PORT = value;
	LCD_WR_Trigger();
	LCD_CS_HIGH;
}

/********************************************/
void LCD_Write16 (uint16_t value)
{
	LCD_RS_HIGH;   /*  RS low: command   RS high: data  */
	LCD_CS_LOW;

	LCD_DATA_PORT = value >> 8;
	LCD_WR_Trigger();
	LCD_DATA_PORT = value;
	LCD_WR_Trigger();
	LCD_CS_HIGH;
}

/********************************************/
void LCD_WriteReg (uint8_t address, uint16_t value)
{
	LCD_WriteCMD(address);
	LCD_Write16(value);
}

uint16_t LCD_Name EEMEM = 12345;
uint16_t LCD_Name1 EEMEM = 12345;
uint16_t LCD_Name2 EEMEM = 12345;

void Read_Reg(uint8_t address)
{
	LCD_RS_HIGH;
	LCD_CS_LOW;
	LCD_DATA_OUT;
	LCD_DATA_PORT = address;
	LCD_WR_Trigger();
	LCD_DATA_IN;
	uint16_t value = LCD_RD_Trigger16();
	eeprom_write_word(LCD_Name, value);
	value = LCD_RD_Trigger16();
	eeprom_write_word(LCD_Name1, value);
	value = LCD_RD_Trigger16();
	eeprom_write_word(LCD_Name2, value);
	
	LCD_CS_HIGH;
	LCD_DATA_OUT;
}


/********************************************/
void TFT_Set_XYRange (uint16_t xstart, uint16_t xend,
uint16_t ystart, uint16_t yend)
{
	LCD_WriteCMD (0x2A);    // column addr set

	LCD_Write16 (xstart);
	LCD_Write16 (xend);

	LCD_WriteCMD (0x2B);    // row addr set

	LCD_Write16 (ystart);
	LCD_Write16 (yend);
}

/********************************************/
void TFT_Draw_Rectangle(uint16_t xstart, uint16_t xend,
uint16_t ystart, uint16_t yend, uint32_t color)
{
	TFT_Set_XYRange (xstart, xend, ystart, yend);
	LCD_WriteCMD (0x2C);  // memory write

	uint32_t am_pixel = (xend - xstart) * (yend - ystart);
	while(am_pixel--)
		LCD_Write16(color);
}

/********************************************/
int Init_LCD(void)
{	
	// Initializing Outputs
	PORTE.DIR |= (1 << LCD_CS_BIT) | (1 << LCD_RS_BIT) | (1 << LCD_WR_BIT) | (1 << LCD_RD_BIT);
	PORTD.DIR |= (1 << LCD_RESET_BIT);
	LCD_CS_HIGH;
	LCD_WR_HIGH;
	LCD_RD_HIGH;
	LCD_RS_HIGH;
	LCD_RESET_HIGH;

	LCD_DATA_OUT;
	
	// Reset ILI

	LCD_RESET_HIGH;
	_delay_ms(100);
	LCD_RESET_LOW;
	_delay_ms(100);
	LCD_RESET_HIGH;
	_delay_ms(100);
	
	LCD_WriteReg(0x0001, 0x0100); // Von oben nach unten malen
	LCD_WriteReg(0x0002, 0x0700); // Line inversion (?)
	LCD_WriteReg(0x0003, 0xD030); // 1100 0000 0011 0000 (0x1030) // 3x6-bit Übertragung, GRAM-Counter beide aufwärts
	LCD_WriteReg(0x0004, 0x0000); // Resizing
	LCD_WriteReg(0x0008, 0x0202); // Front Porch and Back Porch (?) (have to be set!)
	LCD_WriteReg(0x0009, 0x0000); // Display Control (?)
	LCD_WriteReg(0x000a, 0x0000); // Display Control (?)
	LCD_WriteReg(0x000c, 0x0000); // Display Control (?)
	LCD_WriteReg(0x000d, 0x0000); // Display Control (?)
	LCD_WriteReg(0x000f, 0x0000); // Display Control (?)
	LCD_WriteReg(0x0010, 0x0000); // Sleep Mode/Stand By -> power savings
	LCD_WriteReg(0x0011, 0x0000); // Power Control
	LCD_WriteReg(0x0012, 0x0000); // Power Control
	LCD_WriteReg(0x0013, 0x0000); // Power Control
	_delay_ms(200);

	LCD_WriteReg(0x0010, 0x17b0); // Power Control
	LCD_WriteReg(0x0011, 0x0037); // Power Control
	LCD_WriteReg(0x0012, 0x0138); // Power Control
	LCD_WriteReg(0x0013, 0x1700); // Power Control
	_delay_ms(200);

	LCD_WriteReg(0x0029, 0x000d); // Internal VcomH Voltage: VREG1OUT * 0,75
	LCD_WriteReg(0x0020, 0x0000); // Startaddress for running throw picture (0,0)
	LCD_WriteReg(0x0021, 0x0000); // Startaddress for running throw picture (0,0)
	LCD_WriteReg(0x0030,0x0004);
	LCD_WriteReg(0x0031,0x0307);
	LCD_WriteReg(0x0032,0x0002);//0006
	LCD_WriteReg(0x0035,0x0206);
	LCD_WriteReg(0x0036,0x0408);
	LCD_WriteReg(0x0037,0x0507);
	LCD_WriteReg(0x0038,0x0204);//0200
	LCD_WriteReg(0x003C,0x0405);//0504
	LCD_WriteReg(0x003D,0x0F02);
	LCD_WriteReg(0x0050, 0x0000); // Setting Window position to all
	LCD_WriteReg(0x0051, 0x00ef); // Setting Window position to all
	LCD_WriteReg(0x0052, 0x0000); // Setting Window position to all
	LCD_WriteReg(0x0053, 0x013f); // Setting Window position to all
	LCD_WriteReg(0x0060, 0x2700); // Setting Scan Start Position
	LCD_WriteReg(0x0061, 0x0001); // Source Driver Output Level in non-display area, Scanning Direction, Greyscaleinversion = 1
	LCD_WriteReg(0x006a, 0x0000); // no vertical scroll
	LCD_WriteReg(0x0090, 0x0010); // Synchronising speed of ili9325 display operations
	LCD_WriteReg(0x0092, 0x0000); // wie 90
	LCD_WriteReg(0x0095, 0x0120); // 0x0101 bad value -> (?)
	LCD_WriteReg(0x0097, 0x0000); // (?)
	LCD_WriteReg(0x0007, 0x016B); // no partial image, basee image is displayed, Display on, 8-color-display mode, and normal display!
	LCD_WriteReg(0x003A, 0x0101);
	
	Read_Reg(0x0);

	TFT_Draw_Rectangle(0, 0b1111111, 0, 0b1111111, BLACK);
	while(1);
}