2410iis.c

S3C2410 USB Mass storage 源码.

	rIISPSR = (8<<5) + 8;   //Prescaler A,B=5 <- FCLK 135.4752MHz(1:2:4)  
    	}
    else if(sample_rate == 32000)                       
    	{
    ChangeClockDivider(1,1);        //1:2:4
    ChangeMPllValue(0xb7,0x5,0x1);  //FCLK=163.714825MHz (PCLK=40.928571MHz)

    Uart_Init(40928571,115200);    

        rIISPSR = (4<<5) + 4;   //Prescaler A,B=5 <- FCLK 135.4752MHz(1:2:4)  
    	}
    else if(sample_rate == 48000)                       
    	{
    ChangeClockDivider(1,1);        //1:2:4
    ChangeMPllValue(0xa4,0x5,0x1);  //FCLK=147MHz (PCLK=36.85MHz)

    Uart_Init(36850000,115200);    

        rIISPSR = (2<<5) + 2;   //Prescaler A,B=5 <- FCLK 135.4752MHz(1:2:4)  
    	}
#ifdef DMA2Mode   
    txdata = (unsigned short *)(0x30400000);
      //DMA2 Initialize
//    rDISRC2  = (int)(Buf + 0x30);               //0x31000030~(Remove header)      
    rDISRC2  = (int)(txdata );               //0x31000030~(Remove header)      
    rDISRCC2 = (0<<1) + (0<<0);                 //The source is in the system bus(AHB), Increment      
    rDIDST2  = ((U32)rIISFIFO);                  //IISFIFO    
    rDIDSTC2 = (1<<1) + (1<<0);                 //The destination is in the peripheral bus(APB), Fixed  
    rDCON2   = (1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(0<<24)+(1<<23)+(0<<22)+(1<<20)+(64/4);
      //1010 0000 1001 xxxx xxxx xxxx xxxx xxxx
      //Handshake[31], Sync PCLK[30], CURR_TC Interrupt Request[29], Single Tx[28], Single service[27], 
      //I2SSDO[26:24], DMA source selected[23],Auto-reload[22], Half-word[21:20], size/2[19:0]
      
    rDMASKTRIG2 = (0<<2) + (1<<1) + (0<<0);          //No-stop[2], DMA2 channel On[1], No-sw trigger[0] 
    rIISCON = (1<<5) + (1<<2) + (1<<1);         //Tx DMA enable[5], Rx idle[2], Prescaler enable[1]
      //Master mode[8],Tx mode[7:6],High for Left Channel[5],IIS format[4],16bit ch.[3],CDCLK 256fs[2],IISCLK 32fs[1:0]
    rIISMOD = (0<<8) + (2<<6) + (1<<5) + (0<<4) + (1<<3) + (0<<2) + (1<<0);
    
    rIISFCON = (1<<15) + (1<<13);        //Tx DMA,Tx FIFO --> start piling....

    mdt_printf("\nPress any key to exit!!!\n");
    
      //IIS Tx Start
    rIISCON |= 0x1;             //IIS Interface start
    while(!Uart_GetKey());
    {
        if((rDSTAT2 & 0xfffff) < (size/6))
            ChangeDMA2();
    }
#endif

#ifdef PollMode
      //IIS Initialize
      //Master mode[8],Tx mode[7:6],High for Left Channel[5],IIS format[4],16bit ch.[3],CDCLK 256fs[2],IISCLK 32fs[1:0]
    rIISMOD = (0<<8) + (2<<6) + (1<<5) + (0<<4) + (1<<3) + (0<<2) + (1<<0);

    rIISFCON = (0<<15) + (1<<13);       //Tx Normal[15],Tx FIFO Enable[13] --> start piling....  
      //Tx DMA disable[5],Rx DMA disable[4],Tx not idle[3],Rx idle[2],prescaler enable[1],stop[0]
    rIISCON  = (0<<5) + (0<<4) + (0<<3) + (1<<2) + (1<<1) + (0<<0);            
   
      //Tx start
    rIISCON |=0x1;
    txdata = (unsigned short *)(0x30400000);
	//size = Get_MP3PCM_Length();
#endif

}



//===================================================================
void ChangeDMA2(void)
{
    if(which_Buf)
    {
        rDISRCC2 = (0<<1) + (0<<0);                         //AHB, Increment
        rDISRC2  = (int)(Buf + 0x30);                       //0x31000030~(Remove header)
    }
    else
    {
        rDISRCC2 = (0<<1) + (0<<0);                         //AHB, Increment
        rDISRC2  = (int)(Buf + 0x30+(size/2));              //0x31000030 + size/2~
    }
}

//===================================================================
void IIS_PortSetting(void)
{
//----------------------------------------------------------
//   PORT F GROUP
//Ports  :   GPF6    GPF5   GPF4    GPF3  
//Signal :  EINT6   EINT5   EINT4   EINT3
//Setting:  RESERVE RESERVE RESERVE RESERVE
//Binary :     11  ,   11    11      11
//----------------------------------------------------------    
//    rGPFUP  = rGPFUP  & ~(0xf<<3 | (0xf<<3);   //The pull up function is disabled GPF[6:3]    
//    rGPFCON = rGPfCON & ~(0x3f<<6) | (0x15<<6); 

//----------------------------------------------------------
//   PORT E GROUP
//Ports  :  GPE4    GPE3   GPE2  GPE1    GPE0 
//Signal : I2SSDO  I2SSDI CDCLK I2SSCLK I2SLRCK 
//Binary :   10  ,   10     10 ,  10      10    
//----------------------------------------------------------
    rGPEUP  = rGPEUP  & ~(0x1f)  | 0x1f;    //The pull up function is disabled GPE[4:0] 1 1111
    rGPECON = rGPECON & ~(0x3ff) | 0x2aa;   //GPE[4:0]=I2SSDO:I2SSDI:CDCLK:I2SSCLK:I2SLRCK

//    rGPFUP   = ((rGPFUP   & ~(1<<0)) | (1<<0));     //GPF0
//    rGPFCON  = ((rGPFCON  & ~(3<<0)) | (1<<1));     //GPF0=EINT0    
    
//    rEXTINT0 = ((rEXTINT0 & ~(7<<0)) | (2<<0));     //EINT0=falling edge triggered  
}

//===================================================================

//===================================================================
void __irq DMA2_Done(void)
{
    ClearPending(BIT_DMA2);     //Clear pending bit
//mdt_printf("DMA\n");
    WrUTXH0('@');
    if(!which_Buf)
        which_Buf = 1;
    else
        which_Buf = 0;
}
extern unsigned char MIDI_flg;
unsigned char IIS_FLAG = 0;
unsigned short *IIS_BUF = (unsigned short *)(0x30400000);
void IIS_Buffer_Setting(unsigned short *Buffer, unsigned short Size)
{
	unsigned short *temp_buf,i;//,*IIS_BUF;
	temp_buf = Buffer;
	#if 0
	if(IIS_FLAG == 0)
	{
//		mdt_printf("Y");
		IIS_BUF = (unsigned short *)(0x30400000);
		IIS_FLAG = 1;
	}
	else
	{
//		mdt_printf("C");
		IIS_BUF = (unsigned short *)(0x30400000 + 1152);
		IIS_FLAG = 0;
	}
	for(i = 0; i<(Size/2); i++)
	{
		IIS_BUF[i] = temp_buf[i];
	}
	#endif
	for(i = 0; i<(Size/2); i++)
	{
		*IIS_BUF = temp_buf[i];
		IIS_BUF++;
	}
	size+=Size;
	
}

void IIS_Polling(void)
{
    unsigned int i,j;
#if 1
    for(i=0;i<(size/2);i++)
    {
        //if(MIDI_flg != 2)
	//		break;
        while( (rIISCON & 0x080) == 0x80 );     //wait when fifo is not empty.
        for(j = 0; j<32 ; j++)
        {
        	rIISFIFO = *(txdata+i);                 // put the data into fifo        
        	i++;
        }
    }
	//mdt_printf("A");
#else
//	i = ((unsigned int)txdata - 0x30400000);
//		mdt_printf("txdata = %x\n",txdata);
//		mdt_printf("i = %d\n",i);
	
//	if(i >= 1152)
//	{
//		mdt_printf("x");
//		IIS_FLAG = 0;
//	}
//	else if(i < 1152)
//	{
//		mdt_printf("z");
//		IIS_FLAG = 1;
//	}
	if((unsigned int)IIS_BUF == (unsigned int)txdata)
		return;
        while( (rIISCON & 0x080) == 0x80 );     //wait when fifo is not empty.
        for(j = 0; j<32 ; j++)
        {
        	rIISFIFO = *(txdata);                 // put the data into fifo        
        	//j++;
        	txdata++;
        }
//	if((unsigned int)txdata == (0x30400000 + 1152 + 1152))
//	{
//		mdt_printf(".");
//		txdata = (unsigned short *)(0x30400000);
//	}
#endif
}
void IIS_PCM_Polling(void)
{
	unsigned char x[64];
    	unsigned short j,d,fifo_data_size;
	
    	txdata = (unsigned short*)x;
	fifo_data_size = MDT_DSP_FIFO2_GetDataSize();
		//mdt_printf("size = %2x,", fifo_data_size);
	if(fifo_data_size>64)
	{
		d = MDT_DSP_FIFO2_Read(x,64);

		if(d != 0)
		{
        		while( (rIISCON & 0x080) == 0x80 );     //wait when fifo is not empty.
      		 	for(j = 0; j<32;j++)
	        	{
        			//if((j%16) == 0)
        			//{
				//		mdt_printf("\n");
        			//}
	        		//mdt_printf("%2x,", *(txdata+j));
        			rIISFIFO = *(txdata+j);                 // put the data into fifo      
	        	}
		}
	}
}