lcd.h

利用Atmel89C51、按键、蜂鸣器设计能播放十首歌曲的音乐播放系统

#include <reg51.h>
#include <absacc.h>
#include <math.h>
#define w_c_add XBYTE[0x2070]  /* 写命令字地址 */
#define w_d_add XBYTE[0x2071]  /* 写数据地址 */
#define r_s_add XBYTE[0x2072]  /* 读状态字地址 */ 
#define r_d_add XBYTE[0x2073]  /* 读数据地址 */
unsigned char bdata status;
unsigned char code init[18]={0xC7,0xEB,0xB0,0xB4,0xBC,0xFC,0xD1,0xA1,0xD4,0xF1,0xB2,
	                 0xA5,0xB7,0xC5,0xC7,0xFA,0xC4,0xBF};
sbit busy=status^7;
void check_lcd(void);
void lcd_busy(void);
void lcd_show(unsigned char *k);
void check_lcd(void)
{
	unsigned char add;
	unsigned char i;
	lcd_busy();
	w_c_add=0x30;  
	lcd_busy();     
	w_c_add=0x0C;   
	lcd_busy();
	w_c_add=0x01;
	lcd_busy();
	w_c_add=0x02;
	add=0x80;      
	lcd_busy();
	w_c_add=add;
	for(i=0;i<3;i++)
	{
		lcd_busy();
		w_d_add=init[2*i];   
		w_d_add=init[2*i+1]; 																	
	}
	add=0x90;    
	lcd_busy();
	w_c_add=add; 
	for(i=3;i<9;i++)
	{
		
		lcd_busy();
    	w_d_add=init[2*i];	
		w_d_add=init[2*i+1];
	}
}

void lcd_show(unsigned char *k)
{
    unsigned char i=0;
	lcd_busy();
	w_c_add=0x90;
	do
	{  
	   lcd_busy();
	   w_d_add=*(k+i);
	   i++;
	}while(*(k+i)!=0xff);
	
}
void lcd_busy(void)   
{
	do 
	{
  	  status=r_s_add;  
	}	
	while(busy);
}