lcd_1602.c

LCD1602驱动程序 采用c语言驱动lcd1602

#include "LCD_1602.h"

/********************************************************************/
void LCD_delay(unsigned char i)
{
	for(;i>0;i--);
}
/********************************************************************/  
void LCD_en_command(unsigned char command)
{
	P3DIR=0x15;
	P2DIR=0xFF;
	CLR_LCD_1602_RS;
	CLR_LCD_1602_RW;
	LCD_I0=command;
	SET_LCD_1602_EN;
	LCD_delay(50);
	CLR_LCD_1602_EN;
}
/********************************************************************/
void LCD_en_dat(unsigned char dat)
{
        P3DIR=0x15;  
        P2DIR=0xFF;     
	SET_LCD_1602_RS;
	CLR_LCD_1602_RW;
	LCD_I0=dat;
	SET_LCD_1602_EN;
	LCD_delay(50);
	CLR_LCD_1602_EN;
}
/********************************************************************/
void LCD_set_xy( unsigned char x, unsigned char y )  
{
    	unsigned char address;
   		if (y == 0) 
    		address = 0x80 + x;
    	else 
        	address = 0xc0 + x;
    	LCD_en_command(address); 
}
/********************************************************************/
void LCD_write_char( unsigned x,unsigned char y,unsigned char dat)
{
	LCD_set_xy( x, y ); 
	LCD_en_dat(dat);
}
/********************************************************************/
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
{
    LCD_set_xy( X, Y );  
    while (*s) 
    {
    	LCD_I0=*s;
        LCD_en_dat(*s);   
	s ++;
    }
}
/********************************************************************/
void LCD_init(void)
{	
	P3DIR = BIT0 + BIT1 + BIT2;     //  LCD control bus
	LCD_en_command(0x0C);
	LCD_en_command(0x06);
	LCD_en_command(0x80);
	LCD_en_command(0x38);
	LCD_en_command(0x01);
}
/********************************************************************/