//----------------------------------------------------------------------
/*EASTRISING TECHNOLOGY CO,.LTD.*/
// Module    : ERM1602F7-6 or ERM1602DN7-6 with RGB backlight 
// Lanuage   : C51 Code
// Create    : JAVEN
// Date      : May-23-2019
// Drive IC  : KS0066/31066
// INTERFACE : 6800_8bit/4bit
// MCU 		 : AT89C52  12M
// VDD		 : 5V
//----------------------------------------------------------------------
#include <reg51.h>
#include <intrins.h>

#define	uchar	unsigned char
#define	uint	unsigned int

sbit 	BUSY=P1^7;
sbit 	RS=P2^0;
sbit 	R_W=P2^1;
sbit 	E=P2^2;
bit 	log=0;
sbit	int0=P3^2;

sbit 	RED=P2^5;
sbit 	GREEN=P2^4;
sbit 	BLUE=P2^3;

#define  DATA_BUS	P1
#define  TIMING     8               //8: 8 bit data transmission            4: 4 bit data transmission


void LCD_initialize(void);
void Write_CGRAM(uchar  a[]);
void Write_Command(uchar cmd);
void Write_Data(uchar dat);
void Busy(void);
void Delay(uint n);
void Delay1(uint n);
void Write_DDRAM(uchar a);
void write_CGROM(uchar a);
void shaw_character_string(uchar a[]);


uchar code character_string[]=
{
	   "*buydisplay.com*"
	   "EastRising  tech"
};

uchar code font[]=
{
	0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00,
	0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f,
	0x15,0x15,0x15,0x15,0x15,0x15,0x15,0x15,
	0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,
	0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02,	//Year
	0x0f,0x09,0x0f,0x09,0x0f,0x09,0x09,0x13,	//Month
	0x1f,0x11,0x11,0x1f,0x11,0x11,0x11,0x1F,	//Day
	0x0C,0x0a,0x11,0x1f,0x09,0x09,0x09,0x13,	//minute
};



void Step(void) interrupt 0 using 0
{
	Delay1(500);
	if(int0==0)	log=!log;
   while(!int0);
  return;

}


void Delay1(uint n)
{while(n--);
   
}

void Delay(uint n)
{while(n)
 { 
	  n--;
 }
 	for(;log==1;)
	{

	}

}

void Busy(void)
{

        RS=0;R_W=1;
        BUSY=1;        
        E=1;       
        while(BUSY);        
        E=0;         

}




//8-bit data bus
#if  (TIMING==8)
void Write_Data(uchar dat) 
{
    Busy();
    RS=1;
    R_W=0;
	DATA_BUS=dat;
    E=1;
    _nop_();
    E=0;
}

#else
//4-bit data bus
void Write_Data(uchar dat) 
{ Delay(20);
   // Busy();
    RS=1;
    R_W=0;
	DATA_BUS=dat&0xf0;
    E=1;

    _nop_();
    E=0;

	dat<<=4;
	DATA_BUS=dat&0xf0;
    E=1;

    _nop_();
    E=0;

}

#endif

//8-bit data bus
#if  (TIMING==8)
void Write_Command(uchar cmd)
{
	Busy();
    RS=0;
    R_W=0;
	DATA_BUS=cmd;
    E=1;
	_nop_();
    E=0;
}
//4-bit data bus
#else	   				
void Write_Command(uchar cmd)
{  Delay(20);
//   Busy();
    RS=0;
    R_W=0;
	DATA_BUS=cmd&0xf0;		
    E=1;
	
	_nop_();
    E=0;

	cmd<<=4;
	DATA_BUS=cmd&0xf0;
    E=1;
    _nop_();
    E=0;
 
}

#endif

void Write_CGRAM(uchar  a[])
{uchar i=64,k;
	Write_Command(0x40);
	for(k=0;k<64;k++)
	{Write_Data(a[k]);
	}
}

void LCD_initialize(void)
{  
	if(TIMING==8)   //8bit mcu interface
		{ Write_Command(0x38);  //Must be set to 2 lines
		Write_Command(0x38);  //Must be set to 2 lines
		Write_Command(0x38);  //Must be set to 2 lines
		}  

	else  	 //8bit mcu interface
		{
		Write_Command(0x28);  //Must be set to 2 lines
		Write_Command(0x28);   //Must be set to 2 lines
		Write_Command(0x28);  //Must be set to 2 lines
		}  //4bit mcu interface  


 	Write_Command(0x0c);				//display on , cursor off , cursor blink off

	 Write_Command(0x01);				// clear display
  	Delay(1000);					
  	Write_Command(0x06);				// ddram address is increased by 1
				
	 Write_CGRAM(font);					//writing font data to cgram
}

void Write_DDRAM(uchar a)
{uchar j;
 Write_Command(0x02);
  Delay(1000);

   Write_Command(0x80);  //1line  start   address is 0x80
	for(j=0;j<16;j++) 
	{Write_Data(a);
	}

 	Write_Command(0xc0);  //2line start  address is 0xc0
	for(j=0;j<16;j++) 
	{Write_Data(a);
	}

		Delay(65000);
		Delay(65000);

}


void write_CGROM(uchar a)
{uchar j;
 Write_Command(0x02);
  Delay(1000);

     Write_Command(0x80);  //1line  start  address is 0x80
	for(j=0;j<16;j++) 
	{Write_Data(a);
	}

 	Write_Command(0xc0); //2line start  address is 0xc0
 	for(j=0;j<16;j++)
	{Write_Data(a);a+=1;
	}

		Delay(65000);
		Delay(65000);

}

void shaw_character_string(uchar a[])
{uchar j;
 Write_Command(0x02);
  Delay(1000);

 	Write_Command(0x80);   //1line  start  address is 0x80
 	for(j=0;j<16;j++)
	{Write_Data(a[j]);
	}

 	Write_Command(0xc0); //2line start address is 0xc0
 	for(j=0;j<16;j++)
	{Write_Data(a[j]);
	}

		Delay(65000);
		Delay(65000);

}


void main(void)
{	IE=0x81;
	IP=0x01;
	TCON=0x01;
	int0=1;
	DATA_BUS=0xff;
	RED=1;
	GREEN=1;
	BLUE=1;

	Delay(20000);  //wait fo more than 30ms after vdd rises to 4.5v
	LCD_initialize();
while(1)

	{Write_DDRAM(0xff);	
	Write_Command(0x01);
	Delay(35000);
	RED=1;
	GREEN=0;
	BLUE=0;
	shaw_character_string(character_string);
	RED=0;
	GREEN=1;
	BLUE=0;
	Write_DDRAM(0);	
 	RED=0;
	GREEN=0;
	BLUE=1;
	Write_DDRAM(1);
	RED=1;
	GREEN=1;
	BLUE=1;
	Write_DDRAM(2);
	RED=0;
	GREEN=1;
	BLUE=1;
	Write_DDRAM(3);
 	RED=1;
	GREEN=1;
	BLUE=0;
	write_CGROM(0x30);
	RED=1;
	GREEN=0;
	BLUE=1;	
	Write_DDRAM(4);
 	RED=1;
	GREEN=1;
	BLUE=1;	
	Write_DDRAM(5);

	Write_DDRAM(6);
	Write_DDRAM(7);


	}
}