#include <reg52.h>
#include <intrins.h>
sbit RS = P3^0;
sbit RW = P3^1;
sbit EN = P3^2;
#define RS_CLR RS=0
#define RS_SET RS=1
#define RW_CLR RW=0
#define RW_SET RW=1
#define EN_CLR EN=0
#define EN_SET EN=1
#define DataPort P2
void DelayUs2x(unsigned char t)
{
while(--t);
}
void DelayMs(unsigned char t)
{
while(t--)
{
//????1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
/*------------------------------------------------
????
------------------------------------------------*/
bit LCD_Check_Busy(void)
{
DataPort= 0xFF;
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
/*------------------------------------------------
??????
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
// while(LCD_Check_Busy()); //????
DelayMs(5);
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
/*------------------------------------------------
??????
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
//while(LCD_Check_Busy()); //????
DelayMs(5);
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
_nop_();
EN_CLR;
}
/*------------------------------------------------
????
------------------------------------------------*/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/*------------------------------------------------
???????
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x); //?????
}
else
{
LCD_Write_Com(0xC0 + x); //?????
}
while (*s)
{
LCD_Write_Data( *s);
s ++;
}
}
/*------------------------------------------------
??????
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);
}
else
{
LCD_Write_Com(0xC0 + x);
}
LCD_Write_Data( Data);
}
/*------------------------------------------------
?????
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38); /*??????*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*????*/
LCD_Write_Com(0x01); /*????*/
LCD_Write_Com(0x06); /*????????*/
DelayMs(5);
LCD_Write_Com(0x0C); /*????????*/
}
/*------------------------------------------------
???[?????????????,?????????????]
------------------------------------------------*/
void main(void)
{
LCD_Init();
LCD_Clear();//??
while (1)
{
LCD_Write_Char(7,0,'o');
LCD_Write_Char(8,0,'k');
LCD_Write_String(1,1," I LOVE YOU!");
while(1);
}
}
