lcd.txt

实现LCD显示 实现基于DSP开发板的液晶显示。

#define LCDDELAY 1
#define LCDCMDTURNON 0x3f
#define LCDCMDTURNOFF 0x3e
#define LCDCMDSTARTLINE 0xc0
#define LCDCMDPAGE 0xb8
#define LCDCMDVERADDRESS 0x40
#define REGISTERCLKMD (*(unsigned int *)0x58)
#define WAITSTATUS (*(unsigned int *)0x28)

ioport unsigned int port8000;
ioport unsigned int port8001;
ioport unsigned int port8002;
ioport unsigned int port8003;
ioport unsigned int port8004;
ioport unsigned int port8007;

void Delay1(unsigned int nTime);		// 延时子程序
void TurnOnLCD();			// 打开显示
void LCDCLS();				// 清除屏幕显示内容
void display16();
unsigned char ledkey[1][32]=
{
 0x00, 0x01, 0x00, 0x01, 0x3f, 0x01, 0xa0, 0x7f, 0xa1, 0x20, 0x52, 0x12, 0x14, 0x02, 0x08, 0x02, 
 0x18, 0x02, 0x18, 0x06, 0x24, 0x05, 0x24, 0x09, 0x82, 0x18, 0x61, 0x70, 0x1c, 0x20, 0x00, 0x00
};

main()
{
        TurnOnLCD();
        LCDCLS();
	display16( 0,0,1,ledkey);
} 
void Delay1(unsigned int nDelay)
{
	int ii,jj,kk=0;
	for ( ii=0;ii<nDelay;ii++ )
	{
		for ( jj=0;jj<1024;jj++ )
		{
			kk++;
		}
	}
}
void TurnOnLCD()
{
	port8001=LCDCMDTURNON;
	Delay1(LCDDELAY);
	port8002=0;
	Delay1(1024);  
	port8001=LCDCMDSTARTLINE;
	Delay1(LCDDELAY);
	port8002=0;
	Delay1(LCDDELAY);
}

	
void display16( int page,int line,int number,unsigned char (*pos)[32])
{
	int i,n,p,m;
  	for(n=0;n<number;n++)   /*8个字的依次显示*/
		 {
		 p=0;	
		  for(m=0;m<2;m++)/*每个字需要显示2个页*/                         
			{
			port8001=LCDCMDPAGE+m+page;		/*设置操作页=m+1*/
			port8002=0;
			Delay1(LCDDELAY);
			
			port8001=LCDCMDVERADDRESS+n*16+line;	/* 起始列=n*16+8 */
			port8002=0;
			Delay1(LCDDELAY);
			for ( i=0;i<16;i++,p++ )
			{
				if((n*16+line+i)<64)
				{	
				port8003=pos[n][p];	/* 屏幕左侧第1至32行第i列赋值*/						port8002=0;	/* (赋值后当前操作列自动加1，所以不需设置)*/
				port8002=0;
				Delay1(LCDDELAY);                                                                            
				}
		        else
				{
				  port8001=LCDCMDVERADDRESS+n*16+line+i-64;
				  port8002=0;
				  port8004=pos[n][p];	/*屏幕左侧第1至32行第i列赋值*/					  port8002=0;		/*赋值后当前操作列自动加1，所以不需设置*/
				  port8002=0;
				  Delay1(LCDDELAY);
				}
		     }
		 }    
	}     
} 
 void LCDCLS()  /*清除LCD显示器缓存*/
{
	int i,j;
	port8001=LCDCMDSTARTLINE;
	port8002=0;
	Delay1(LCDDELAY);
	for ( i=0;i<8;i++ )
	{
		port8001=LCDCMDPAGE+i;
		port8002=0;
		Delay1(LCDDELAY);
		port8001=LCDCMDVERADDRESS;
		port8002=0;
		Delay1(LCDDELAY);
		for ( j=0;j<64;j++ )
		{
			port8003=0;
			Delay1(LCDDELAY);
			port8002=0;
			Delay1(LCDDELAY);
		}
		port8001=LCDCMDPAGE+i;
		Delay1(LCDDELAY);
		port8002=0;
		Delay1(LCDDELAY);
		port8001=LCDCMDVERADDRESS;
		port8002=0;
		Delay1(LCDDELAY);
		for ( j=0;j<64;j++ )
		{
			port8004=0;
			Delay1(LCDDELAY);
			port8002=0;
			Delay1(LCDDELAY);
		}
	}
}