#include "lcd_defines.h"
#include "types.h"

#define dW digitalWrite 
#define dR digitalRead


void WriteLCD(u8 dat)
{
	dW(LCD_D7,((dat>>7)&1));
	dW(LCD_D6,((dat>>6)&1));
	dW(LCD_D5,((dat>>5)&1));
	dW(LCD_D4,((dat>>4)&1));

	dW(LCD_EN,1); //high to...
	delayMicroseconds(1);
	dW(LCD_EN,0); //low pulse
	delay(2);  //atleast 2ms between consecutive writes
	              //for syn bt/w cpu & LCD
	dW(LCD_D7,((dat>>3)&1));
	dW(LCD_D6,((dat>>2)&1));
	dW(LCD_D5,((dat>>1)&1));
	dW(LCD_D4,((dat>>0)&1));
		
	dW(LCD_EN,1); //high to...
	delayMicroseconds(1);
	dW(LCD_EN,0); //low pulse
	delay(2);  //atleast 2ms between consecutive writes
	              //for syn bt/w cpu & LCD


}

void CmdLCD(u8 cmd)
{
	dW(LCD_RS,0);//select command register for writing to
	WriteLCD(cmd);//write command register
}

void CharLCD(u8 ch)
{
	dW(LCD_RS,1); //select data register for writing to
	WriteLCD(ch);  //write to data register then to DDRAM 
	               //for display
}	

void InitLCD(void)
{
	
	pinMode(LCD_D4,OUTPUT);
	pinMode(LCD_D5,OUTPUT);
	pinMode(LCD_D6,OUTPUT);
	pinMode(LCD_D7,OUTPUT);
  pinMode(LCD_RS,OUTPUT);
  pinMode(LCD_EN,OUTPUT);
  
	delay(15);
	delayMicroseconds(100);
	CmdLCD(0x03);
	delay(4);
	delayMicroseconds(200);
	CmdLCD(0x03);
	delayMicroseconds(100);
	CmdLCD(0x03);
	CmdLCD(0x02);
	CmdLCD(0x28);
	CmdLCD(0x0e);
	CmdLCD(0x01);
	CmdLCD(0x06);
	
}	

void StrLCD(char *ptr) {	while(*ptr)	CharLCD(*ptr++); }

void U32LCD(unsigned long n)
{
	unsigned char a[10]={0};	
	signed long int i=0;
	
	if(n==0)
		CharLCD('0');
	else
	{
		while(n>0)
		{	
		 a[i]=(n%10)+48;
		 n=n/10;
		 i++;
		}
    for(--i;i>=0;i--)
        CharLCD(a[i]);		
  }		
}

void S32LCD(signed long int n)
{
	if(n<0)
	  CharLCD('-');
  n=-n;
  U32LCD(n);	
}

void F32LCD(float f,unsigned int ndp)
{
	unsigned int i,j;
	
	if(f<0.0)
	{
		CharLCD('-');
		f=-f;
	}
	i=f;
	U32LCD(i);
	CharLCD('.');
	for(j=0;j<ndp;j++)
	{
		f=(f-i)*10;
		i=f;
		CharLCD(i+48);
	}
}	

void BuildCGRAM(unsigned char *p,unsigned char n)
{
	unsigned char i;
	//point cursor to CGRAM beginning
	CmdLCD(GOTO_CGRAM_START);
	for(i=0;i<n;i++)
	{
		//write cgram via data register
		CharLCD(p[i]);
	}
	//point back cursor to DDRAM
	CmdLCD(GOTO_LINE1_POS0);
}