lcd1602.h

来自「Keil c编写的DS1302源代码。DS1302 是美国DALLAS公司推出的」· C头文件 代码 · 共 93 行

//#include"reg51.h"

//*******************LCD模块

#define LCD_DATA P1        //LCD的数据口

sbit LCD_BUSY=LCD_DATA^7;  //LCD忙信号位

sbit LCD_RW=P2^1;          //LCD读写控制
sbit LCD_RS=P2^0;          //LCD寄存器选择
sbit LCD_EN=P2^2;          //LCD使能信号


void LCD_check_busy(void)   //检测LCD状态，看它是不是还在忙呢
{
 while(1)
  {
   LCD_EN=0;
   LCD_RS=0; //指令寄存器通信
   LCD_RW=1;  //read data
   LCD_DATA=0xff;
   LCD_EN=1;
   if(!LCD_BUSY)break;
  }
 LCD_EN=0;
}

void LCD_cls(void)          //LCD清屏
{
 
 LCD_check_busy();
 LCD_RS=0;
 LCD_RW=0;
 LCD_DATA=1;
 LCD_EN=1;
 LCD_EN=0;
 
}

void LCD_write_instruction(unsigned char LCD_instruction)   //写指令到LCD
{
 LCD_check_busy();
 LCD_RS=0;
 LCD_RW=0;	//写数据
 
 LCD_DATA=LCD_instruction;
 LCD_EN=1;
 LCD_EN=0;
 }

void LCD_write_data(unsigned char LCD_data)      //输出一个字节数据到LCD
{
 LCD_check_busy();
 LCD_RS=1;
 LCD_RW=0;
 
 LCD_DATA=LCD_data;
 LCD_EN=1;
 LCD_EN=0;
 }
 
void LCD_set_position(unsigned char x)            //LCD光标定位到x处
{
LCD_write_instruction(0x80+x);
}





void LCD_printc(unsigned char lcd_data)          //输出一个字符到LCD
{
 LCD_write_data(lcd_data);
}

void LCD_prints(unsigned char *lcd_string)       //输出一个字符串到LCD
{
 unsigned char i=0;
 while(lcd_string[i]!=0x00)
  {
   LCD_write_data(lcd_string[i]);
   i++;
  } 
}

void LCD_initial(void)                        //初始化LCD
{
 LCD_write_instruction(0x3c);
 LCD_write_instruction(0x0c);
 LCD_write_instruction(0x06);//显示屏一定要不移动。
 LCD_cls();
}
//*************************LCD模块结束