LCD1602的使用

主文件函数：

#include <reg52.h>
#include "./delay/delay.h"

sbit RS = P2^4;
sbit RW = P2^5;
sbit E  = P2^6;

#define LCDPORT P0
#define LCD_WRITE_DATA 1
#define LCD_WRITE_COM  0

void lcd1602_write(unsigned char byte,unsigned char flag)
{
	  if(flag)
		{
			  RS = 1;
		}
		else
		{
			  RS = 0; 
		}
		RW = 0; //д
		E = 1;  
		LCDPORT = byte;
		delay_us(5);
		E = 0; 
}

void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte)
{
    if((x > 15) || (y > 1))
		{
			  return ;
		}
		if(0 == y)
		{
			  lcd1602_write(0x80 + x,LCD_WRITE_COM);
		}
		else
		{
			  lcd1602_write(0x80 + 0x40 + x,LCD_WRITE_COM);
		}
		lcd1602_write(byte,LCD_WRITE_DATA);
}

void lcd1602_dis_str(unsigned char x, unsigned char y, unsigned char *str)
{
	  if((x > 15) || (y > 1))
		{
			  return ;
		}
		if(0 == y)
		{
			  lcd1602_write(0x80 + x,LCD_WRITE_COM);
		}
		else
		{
			  lcd1602_write(0x80 + 0x40 + x,LCD_WRITE_COM);
		}
		while(*str != '\0')
		{
			  lcd1602_write(*str,LCD_WRITE_DATA);
			  str++;
		}
}

void lcd_init()
{
	  delay_ms(15);
	  lcd1602_write(0x38,LCD_WRITE_COM); 
	  delay_ms(5);
		lcd1602_write(0x38,LCD_WRITE_COM); 
	  delay_ms(5);
		lcd1602_write(0x38,LCD_WRITE_COM); 
	  delay_ms(5);
		lcd1602_write(0x38,LCD_WRITE_COM); 
	  delay_ms(5);
		lcd1602_write(0x08,LCD_WRITE_COM);
	  delay_ms(5);
		lcd1602_write(0x01,LCD_WRITE_COM);
	  delay_ms(5);
	  lcd1602_write(0x06,LCD_WRITE_COM); 
	  delay_ms(5);
		lcd1602_write(0x0c,LCD_WRITE_COM); 
	  delay_ms(5);
}

void main()
{
	  lcd_init();
    lcd1602_write(0x80,LCD_WRITE_COM);
    lcd1602_write('a',LCD_WRITE_DATA);
	  lcd1602_dis_str(4,0,"i like mcu");
	  while(1);
}

延时函数：

void delay_us(unsigned char t)
{
    while(--t);
}

void delay_ms(unsigned char t)
{
    while(t--)
		{
        delay_us(245);
			  delay_us(245);
    }
}

void delay_s(unsigned char t)
{
    while(t--)
    {
		    delay_ms(200);	
			  delay_ms(200);
			  delay_ms(200);
			  delay_ms(200);
			  delay_ms(200);
    }
}