1602.h

基于51单片机与GPS系统的智能坦克车源代码+PROTUES仿真+电路图。欢迎下载~

sbit LCD_DB0= P1^0;
sbit LCD_DB1= P1^1;
sbit LCD_DB2= P1^2;
sbit LCD_DB3= P1^3;
sbit LCD_DB4= P1^4;
sbit LCD_DB5= P1^5;
sbit LCD_DB6= P1^6;
sbit LCD_DB7= P1^7;
sbit LCD1602_RS=P2^0;   
sbit LCD1602_RW=P2^1;//实际上没有读LCM,RW脚可以直接接地   
sbit LCD1602_EN=P2^2; 

void LCD_write_char( unsigned x,unsigned char y,unsigned char dat);    //在指定位置显示字符
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);//在指定位置显示字符串
void LCD_cls(void);//清屏
void LCD_en_command(unsigned char command);
void LCD_en_dat(unsigned char temp);
void LCD_set_xy( unsigned char x, unsigned char y );
void LCD_init(void);
void SET_LCD(unsigned char IO_temp);
void delayms(unsigned char ms);
void lcddelay(void);

unsigned char LCDIO; 

void LCD_cls(void)
{
    LCD_en_command(0x01);    
    delayms(2);
}

void LCD_en_command(unsigned char command)
{
    LCD1602_RS=0;   
    LCD1602_RW=0;
    LCD1602_EN=0;
    LCDIO=(command & 0xf0);
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    lcddelay();
    LCD1602_EN=0;
    LCDIO=(command & 0x0f)<<4;
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    lcddelay();
    LCD1602_EN=0;
}

void SET_LCD(unsigned char IO_temp)
{   
    LCD_DB7=IO_temp&0x80;
    LCD_DB6=IO_temp&0x40;
    LCD_DB5=IO_temp&0x20;
    LCD_DB4=IO_temp&0x10;
}

void LCD_en_dat(unsigned char dat)
{
    LCD1602_RS=1;
    LCD1602_RW=0;
    LCD1602_EN=0;
    LCDIO=(dat & 0xf0);
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    lcddelay();
    LCD1602_EN=0;
    LCDIO=(dat & 0x0f)<<4;
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    lcddelay();
    LCD1602_EN=0;
}

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 );    //set address 
    while (*s)       // write character
    {
        LCDIO=*s;
        SET_LCD(LCDIO);
        LCD_en_dat(*s);   
        s ++;
    }
}

void LCD_init(void)
{
    LCD_en_command(0x33);
    delayms(20);
    LCD_en_command(0x32);
    delayms(20);
    LCD_en_command(0x08);
    delayms(5);
    LCD_en_command(0x01);
    delayms(5);
    LCD_en_command(0x06);
    delayms(5);
    LCD_en_command(0x0c);
    delayms(5);
}

void delayms(unsigned char ms)    
{
    unsigned char i;
    while(ms--)
    {
        for(i = 0; i < 115; i++);
    }
}

void lcddelay(void)    
{
    unsigned char i;
    for(i = 0; i < 2; i++);
}