LCD1602程序

深藏阁楼爱情的钟 2022-09-26 02:11 191阅读 0赞

#ifndef _LCD_H_
    #define _LCD_H_
    
    #include <reg52.h>
    #include "../delay/delay.h"
    
    #define LCDPORT P0
    #define LCD_WRITE_DATA 1
    #define LCD_WRITE_COM 0
    
    sbit RS = P2^4;
    sbit RW = P2^5;
    sbit E = P2^6;
    
    extern void lcd_write(unsigned char byte, unsigned char flag);
    extern void lcd_init();
    extern void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte);
    extern void lcd_dis_str(unsigned char x, unsigned char y, unsigned char *src);
    
    #endif
    
    
    
    
    #include "lcd.h"
    
    /*------------------------------------------------
                      LCD初始化函数
    ------------------------------------------------*/
    void lcd_init()
    {
        delay_ms(15);
    
    	lcd_write(0x38,LCD_WRITE_COM);		 //设置8位数据接口两行显示(5 * 7 点阵字符)
    	delay_ms(15);
    	lcd_write(0x38,LCD_WRITE_COM);
    	delay_ms(15);
    	lcd_write(0x38,LCD_WRITE_COM);
    	delay_ms(15);
    	lcd_write(0x38,LCD_WRITE_COM);
    	delay_ms(15);
    
    	lcd_write(0x08,LCD_WRITE_COM);		 //关闭显示，关闭光标和闪烁
        delay_ms(5);						 
    	lcd_write(0x01,LCD_WRITE_COM);		 //清屏
        delay_ms(5);
    	lcd_write(0x06,LCD_WRITE_COM);		 //设置指针方式，画面平移
        delay_ms(5);
    	lcd_write(0x0c,LCD_WRITE_COM);		 //设置指针方式，画面不平移
        delay_ms(5);
    }
    
    /*------------------------------------------------
                      写入命令函数
    ------------------------------------------------*/
    void lcd_write(unsigned char byte, unsigned char flag)
    {
        if(1 == flag)
    	{
            RS = LCD_WRITE_DATA;	  //选择输入数据为数据
    	}
    	else
    	{
    	    RS = LCD_WRITE_COM;	      //选择输入数据为指令
    	}
    				    
    	RW = 0;					      //写
    	E = 1;					      //选中LCD
    	LCDPORT = byte;			   
    	delay_us(5);			      //稳定性考虑
    	E = 0;					      //失能LCD
    }
    
    /*------------------------------------------------
                      显示一个字节
    ------------------------------------------------*/
    void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte)
    {
      	if(0 == y)//确定显示的列（0 - 1）
    	{
    	    lcd_write(0x80 + x - 1, LCD_WRITE_COM);
    		lcd_write(byte, LCD_WRITE_DATA);
    	}
    	else
    	{
           lcd_write(0x80 + 0x40 + x - 1, LCD_WRITE_COM);
    		lcd_write(byte, LCD_WRITE_DATA);
    	}
    }
    
    /*------------------------------------------------
                       显示字符串
    ------------------------------------------------*/
    void lcd_dis_str(unsigned char x, unsigned char y, unsigned char *src)
    {
    	if(y == 0)//确定显示的列（0 - 1）
    	{
    		lcd_write(x + 0x80,LCD_WRITE_COM);
    	}
    	else
    	{
    		lcd_write(x + 0x80 + 0x40,LCD_WRITE_COM);
    	}	
    	while(*src != '\0')
    	{
    		lcd_write(*src,LCD_WRITE_DATA);
    		src++;
    	}	
    }