mega8_player_v11.c

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			FAT_LoadPartCluster(p,i,buffer);//读一个扇区	//read a sector
			count=0;
			while(count<512)
			{
				if(flag==0){if(keylen){Delay(100);keylen--;}}
				else if(type == MID){if(keylen){Delay(100);keylen--;}}
				if((VS1003B_PIN & _BV(VS1003B_DREQ))!=0 && flag)	//根据需要送数据  //send data  honoring DREQ
				{
					for(j=0;j<32;j++)			//每次送32个数据		//32 Bytes each time
					{
						VS1003B_WriteDAT(buffer[count]);
						count++;
					}
					if(keylen)keylen--;			//用于键处理			//for key processing
					if(sector == totalsect && count >= leftbytes)		//如果文件已结束		//if this is the end of the file
					{
						if(type == MID)//waiting the midi file was decoded
						{//对于mid音乐要接着送2048个零
							count=0;
							while(count<2048)//recommand 2048 zeros honoring DREQ goto next songs
							{
								if((VS1003B_PIN & _BV(VS1003B_DREQ))!=0 )
								{
									for(j=0;j<32;j++)
									{
										VS1003B_WriteDAT(0x00);
										count++;
									}
									if(count == 2047)break;
								}
							}
						}
						i=SectorsPerClust;
						break;
					}//文件结束			//file ended
					if(count == 511){break;}//512字节送完跳出		//break if a sector was sent
				}
				if((PIND&STOP)==0 /*&& keylen==0*/)//播放暂停键		//key PLAY/PAUSE
			    {
	 			    Delay(100);
					if(!(PIND&STOP))
					{
						while(!(PIND&STOP));
						 if(flag)flag=0;
						 else flag=1;
						 Delay(1000);
					 }
				 }
				else if(!(PIND&DOWN) && keylen==0)  //音量-			//Volume down
	 			{
				    Delay(100);
	   			 	if(!(PIND&DOWN))  
					{
					keylen=200;
					   vol=vol+((uint16)(1<<8)+1);
					   if(vol>=0xFEFE) vol=0xFEFE; 
	   			       else VS1003B_WriteCMD(0x0b,vol);
					 }
	 			 }
				 else if(!(PIND&UP) && keylen==0) //音量+			//Volume up
	  			 {
					 Delay(100);
				 	 if(!(PIND&UP)) 
					 {
					 keylen=200;
					   vol=vol-((uint16)(1<<8)+1);
					   if(vol<=0x0101) vol=0x0101;
					   else VS1003B_WriteCMD(0x0b,vol);
	   			     }
				  }
				 else if(!(PIND&NEXT)) //下一首						next songs
	 			 {
					Delay(0x7fff);		
					if(!(PIND&NEXT))
					{
						Delay(0x7fff);
						if(!(PIND&NEXT))
						{
							while(!(PIND&NEXT));
							songs++;
							if(songs > totalsongs)songs=1;
							{
								free(buffer);
							//	Delay(0xffff);
								goto next;
							}
						}
					}
	  			 }
				 else if(!(PIND&PREV)) //上一首						previous songs
	 			 {
					Delay(0x7fff);		
					if(!(PIND&PREV))
					{
						Delay(0x7fff);
						if(!(PIND&PREV))
						{
							while(!(PIND&PREV));
							if(songs == 1)songs=totalsongs;
							else songs--;
							{
								free(buffer);
							//	Delay(0xffff);
								goto next;
							}
						}
					}
	  			 }
				 else if((!(PIND&MODE)) && keylen==0) //模式			//mode key
	 			 {
					Delay(100);		
					if(!(PIND&MODE))
					{
						keylen=0xffff;
						if(mode==REPET_ALL)
						{
							mode=REPET_ONE;
							LED1_ON();
							LED2_OFF();
						}
						else if(mode==REPET_ONE)//next mode is shuffle
						{
							mode=RANDOM;
							LED1_OFF();
							LED2_ON();
							srandom(((uint32)TCNT1)<<16);//产生随机数的种子
						}
						else 
						{
							mode=REPET_ALL;
							LED1_OFF();
							LED2_OFF();
						}
					}
	  			 }
			}
			sector++;
			free(buffer);
		}
		i=0;
		p=FAT_NextCluster(p);//读下一簇数据			//read next cluster
		if(p == 0x0fffffff || p == 0x0ffffff8 || (FAT32_Enable == 0 && p == 0xffff))//如果无后续簇则结束，	//no more cluster
		{
				if(mode==REPET_ALL)songs++;
				if(songs>totalsongs)songs=1;
				goto next;
		}
	}
}

//main function
int main()
{
	uint8 retry = 0;

	DDRD &= 0x03;//初始化端口
	PORTD |= 0xfc;
	
	LED1_CON();
	LED1_OFF();
	LED2_CON();
	LED2_OFF();


	OSCCAL = 0x00;//最小RC振荡频率	//in order to operate some low speed card the initialization should run at lowest speed

	Delay(0xffff);

	MMC_SD_Init();//初始化spi口		//SPI initialize

	Delay(0xffff);

	if(VS1003B_Init())
	{
		//LED1_ON();//配置VS1003	//config vs1003
		while(1)
		{
			LED1_ON();
			Delay(0xffff);
			LED1_OFF();
			Delay(0xffff);
		}
	}
	Delay(0xffff);//提供足够的延时				//supply enough delay
	Delay(0xffff);
	Delay(0xffff);
	Delay(0xffff);
	Delay(0xffff);

	while(MMC_SD_Reset())//初始化SD卡					//sd card initialize
	{
		retry++;
		if(retry>20)
		{
		//	LED2_ON();
			while(1)
			{
				LED2_ON();
				Delay(0xffff);
				LED2_OFF();
				Delay(0xffff);
			}
		}
	}

	OSCCAL = 0xff;//最大RC振荡频率				//normal operation maximum the frequency

	Delay(0xffff);								//wait for stable

	if(FAT_Init())//初始化文件系统 支持FAT16和FAT32	//initialize file system  FAT16 and FAT32 are supported
	{
	//	LED1_ON();
	//	LED2_ON();
	//	while(1);
		while(1)
		{
			LED1_ON();LED2_ON();
			Delay(0xffff);
			LED1_OFF();LED2_OFF();
			Delay(0xffff);
		}

	}
	Search(PATH,&MusicInfo,&totalsongs,&type);//搜索根目下的歌曲 不包含子目录
	//也可以指定文件夹 如Search("\\new\\mp3",&MusicInfo,&totalsongs,&type);
	//代表在根目录下的new文件夹下的mp3文件下的音乐文件

	//search the songs in the root directery on the SD card
	//You can also specify the directery where the songs are placed
	//eg: Search("\\new\\mp3",&MusicInfo,&totalsongs,&type);
	//		means search the file in the foler C:\new\mp3

	PlayMusic();//播放歌曲		//play songs
	while(1)
	{
		while(1)
		{
			LED1_ON();LED2_OFF();
			Delay(0xffff);
			LED2_ON();LED1_OFF();
			Delay(0xffff);
		}
	}
	return 0;
}