lcd4bit.c

Energy meter To measure the voltage and current

sbit LCD_RS=P0^2;
sbit LCD_EN=P0^3;
#define	LCD_STROBE	((LCD_EN = 1),(LCD_EN=0))

#define set_bit(REG,BIT) (REG|=(1<<BIT))
#define clear_bit(REG,BIT) (REG&=~(1<<BIT))
#define bit_is_set(REG,BIT) (REG&(1<<BIT))

static unsigned char ControlPin=0;


void LCD_Delay(unsigned char Delay)
{
	int i,j;
	for(i=0;i<Delay;i++)
	{
		for(j=0;j<100;j++);
	}
}

void commd(unsigned char commd)
{
	unsigned char temp;
	temp=commd;
	temp&=0xF0;
	P0=temp;
	LCD_RS=0;
	LCD_EN = 1;
	LCD_EN = 0;
	temp=commd;
	temp<<=4;
	temp&=0xF0;
	P0=temp;
	LCD_RS=0;
	LCD_EN = 1;
	LCD_EN = 0;
	LCD_Delay(10);
}




void prnt(unsigned char character)
{
  	unsigned char temp;
	temp=character;
	temp&=0xF0;
	P0=temp;

	LCD_RS = 1;
	LCD_EN = 1;
	LCD_EN = 0;
	LCD_RS = 0;

	temp=character;
	temp<<=4;
	temp&=0xF0;
	P0=temp;

	LCD_RS = 1;
	LCD_EN = 1;
	LCD_EN = 0;
	LCD_RS = 0;
	LCD_Delay(10);

}

void LCD_Init()
{
	LCD_EN = 0;
	LCD_RS = 0;
 	commd(0x01);
	commd(0x02);
 	commd(0x06);
 	commd(0xC0);
	commd(0x28);
	commd(0x40);
	commd(0x80);
	LCD_Delay(10);
//	commd(0x02);
//
//	commd(0x28);
//
//	commd(0x0C);
//
//	commd(0x01);
//
//	commd(0x02);	
}