cs22-2.c

C51驱动16X2点阵字符液晶模块.可以用的.供大家参考

#include <REG51.H>	
#include<INTRINS.H>		
#define uchar unsigned char
#define uint unsigned int
#define DataPort P0		
sbit LCM_RS=P2^0;		
sbit LCM_RW=P2^1;		
sbit LCM_EN=P2^2;		
uchar code exampl[]="ForAnExample www.hlelectron.com ";
void Delay400ms(void);	
void Delay5ms(void);		
void WaitForEnable(void);	
void WriteDataLCM(uchar data W);
void WriteCommandLCM(uchar CMD,uchar Attribc);
void InitLcd(void);			
void Display(uchar dd);	
void DisplayOneChar(uchar x,uchar y,uchar Wdata);
void ePutstr(uchar x,uchar y,uchar code *ptr);
//*******************************
void main(void)			
{						
	uchar temp;			
	Delay400ms();		
	InitLcd();		
	temp=32;		
	ePutstr(0,0,exampl);	
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	Delay400ms();		
	while(1)	
	{				
		temp&=0x7f;		
		if(temp<32)temp=32;
		Display(temp++);	
		Delay400ms();	
	}					
}						
/****************************************/
void InitLcd(void)			
{					
WriteCommandLCM(0x38,0);
Delay5ms();		
WriteCommandLCM(0x38,0);
Delay5ms();		
WriteCommandLCM(0x38,0);
Delay5ms();			
WriteCommandLCM(0x38,1);
WriteCommandLCM(0x08,1);
WriteCommandLCM(0x01,1);
WriteCommandLCM(0x06,1);
WriteCommandLCM(0x0c,1);
}			
/*****************************************/
void Delay5ms(void)		
{				
uint i=5552;			
while(i--);
}				
/****************************************/
void Delay400ms(void)	
{					
uchar i=5;				
uint j;					
	while(i--)			
	{				
	j=7269;				
	while(j--);			
	}					
}				
/*****************************************/
void LocateXY(char posx,char posy)
{						
uchar temp;				
	temp&=0x7f;			
	temp=posx&0x0f;	
	posy&=0x01;			
	if(posy)temp|=0x40;	
	temp|=0x80;			
	WriteCommandLCM(temp,0);
}						
/*****************************************/
void WaitForEnable(void)	
{				
DataPort=0xff;		
LCM_RS=0;LCM_RW=1;_nop_();
LCM_EN=1;_nop_();_nop_();
while(DataPort&0x80);	
LCM_EN=0;		
}		
/*****************************************/
void WriteDataLCM(uchar dataW)
{					
WaitForEnable();			
LCM_RS=1;LCM_RW=0;_nop_();
DataPort=dataW;_nop_();	
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
}			
/*****************************************/
void WriteCommandLCM(uchar CMD,uchar Attribc)
{				
if(Attribc)WaitForEnable();	
LCM_RS=0;LCM_RW=0;_nop_();
DataPort=CMD;_nop_();	
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
}				
/****************************************/
void Display(uchar dd)		
{						
uchar i;					
	for(i=0;i<16;i++){		
	DisplayOneChar(i,1,dd++);
	dd&=0x7f;	
	if(dd<32)dd=32;		
	}	
}	
/****************************************/
void DisplayOneChar(uchar x,uchar y,uchar Wdata)
{						
LocateXY(x,y);		
WriteDataLCM(Wdata);	
}                      
/****************************************/
void ePutstr(uchar x,uchar y,uchar code *ptr)
{					
uchar i,l=0;			
	while(ptr[l]>31){l++;}	
	for(i=0;i<l;i++){	
	DisplayOneChar(x++,y,ptr[i]);
	if(x==16){		
		x=0;y^=1;	
	}			
  }				
}