lcd.h

用89C51SND1C实现MP3播放器的源代码.用KEIL c51编写.

/////////////////////////////////////////////////////////////////
//函数
//write_english(x,y,array)  x指点数据显示所在列(0~115),
//		y指定数据显示所在行(1,2,3,4),array为8字节数组指针
//write_chinese(x,y,array)  x指定数据显示所在列(0~107),
//		y指定数据显示所在行(1,2),array为32字节数组指针
//lcd_init()	初始化
 
#define TIME 1	//设置延时时间

sbit di=P1^4;	//数据指令
sbit e1=P1^7;	
sbit e2=P1^6;
sbit rw=P1^5;	//读写
/////////////////////////////////////////////////////////////////


void delay(int num)
{
	while(num--) ;
}

void send_command(unsigned char cmd)
{
	e1=0;
	e2=0;
	di=rw=0;
	P4=cmd;
	e1=1;
	e2=1;
	delay(TIME);
	e1=0;
	e2=0;
	delay(TIME);
	P4=0xff;
	e1=1;
	e2=1;
}

void lw(unsigned char x,unsigned char y,unsigned char dd)
{
	if (x<61) 
		{	e1=1;
			di=rw=0;P4=0x00|x;e1=1;delay(TIME);e1=0;delay(TIME);
			e1=1;
			di=rw=0;P4=0xb8|y;e1=1;delay(TIME);e1=0;delay(TIME);
			e1=1;
			di=1;rw=0;P4=dd;e1=1;delay(TIME);e1=0;delay(TIME);
			e1=1;
		}
	 else 
		{
			x=x-61;
			e2=1;
			di=rw=0;P4=0x00|x;e2=1;delay(TIME);e2=0;delay(TIME);
			e2=1;
			di=rw=0;P4=0xb8|y;e2=1;delay(TIME);e2=0;delay(TIME);
			e2=1;
	 		di=1;rw=0;P4=dd;e2=1;delay(TIME);e2=0;delay(TIME);
	 		e2=1;
		}
	P4=0xff;
}

void lcd_init(void)
{
	unsigned char x,y;
	e1=0;
	e2=0;
	di=0;
	rw=0;
	send_command(0xae);	
	send_command(0xc0);
	send_command(0xa4);
	send_command(0x00);
	send_command(0xbb);
	send_command(0xa9);
	send_command(0xa0);
	send_command(0xee);

	for (y=0;y<4;y++) 	
		{
			for (x=0;x<122;x++) lw(x,y,0);
		}
	send_command(0xaf);

}

void write_chinese(x,y,array)
unsigned char x,y;
unsigned char array[];
{	
	unsigned char j,dd;
	if(y==2) y=0;
	if(y==1) y=2;

	for(j=0;j<32;j++)
	{
		dd=array[j];
		if(j<16) lw(x+j,y,dd);
		else     lw(x+j-16,y+1,dd);
	}	
}	


void write_english(x,y,array)
unsigned char x,y;
unsigned char array[];
{
	unsigned char j,dd;
	switch(y)
	{	
		case 1:
			y=2;break;
		case 2:
			y=3;break;
		case 3:
			y=0;break;
		case 4:
			y=1;break;
		default:
			break;
	 }
	for(j=0;j<8;j++)
	{
		dd=array[j];
		lw(x+j,y,dd);
	} 
}