#include<reg52.h>
#include<intrins.h>
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P2^5;
#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 P0
void DelayUs2x (unsigned char t)
{
while (--t);
}
void DelayMs (unsigned char t)
{
while(t--)
{
DelayUs2x(245);
DelayUs2x(245);
}
}
bit LCD_Check_Busy (void)
{
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
void LCD_Write_Com (unsigned char com)
{
while (LCD_Check_Busy());
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
void LCD_Write_Data (unsigned char Data)
{
while (LCD_Check_Busy());
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,"hellow world");
while (1);
}
}
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