philips1341.c

arm 9 IIS 音频实验程序 s3c2410

/*********************************************************************************************
* File：	philips1341.c
* Author:	embest	
* Desc：	LCD common macro define and function declare
* History:	
*********************************************************************************************/

#include "2410lib.h"

/*------------------------------------------------------------------------------------------*/
/*	 								macro define						 				    */
/*------------------------------------------------------------------------------------------*/

#define L3C 		(0x10)			//GPB4=L3C
#define L3D 		(0x8)			//GPB3=L3D
#define L3M 		(0x4)			//GPB2=L3M

#define	L3M_LOW()	{rGPBDAT &= ~(L3M);}
#define	L3M_HIGH()	{rGPBDAT |= (L3M);}
#define	L3C_LOW()	{rGPBDAT &= ~(L3C);}
#define	L3C_HIGH()	{rGPBDAT |= (L3C);}
#define	L3D_LOW()	{rGPBDAT &= ~(L3D);}
#define	L3D_HIGH()	{rGPBDAT |= (L3D);}

#define FS441KHZ	1

/*------------------------------------------------------------------------------------------*/
/*	 								function declare						 				    */
/*------------------------------------------------------------------------------------------*/
void write_l3addr(UINT8T ucData);
void write_l3data(UINT8T ucData, int nHalt);
void init_1341(char cMode);

/*********************************************************************************************
* name:		init_1341
* func:		Init philips 1341 chip
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void init_1341(char cMode)
{
    // Port Initialize 
	//GPB[4:2]=Output(L3CLOCK):Output(L3DATA):Output(L3MODE)
    rGPBCON = rGPBCON & ~((1<<9)|(1<<7)|(1<<5)) | (1<<8)|(1<<6)|(1<<4); 
	rGPBUP  = rGPBUP  |(0x7<<2);       	//The pull up function is disabled GPB[4:2]    
 
    L3M_HIGH();							// L3M=H(start condition),L3C=H(start condition)					
	L3C_HIGH();    
                                    	
    write_l3addr(0x14+2);				// status (000101xx+10)
    write_l3data(0x50,0); 				// 0,1,01,000,0: reset,384fs,no DCfilter,iis

    write_l3addr(0x14+2); 				// status (000101xx+10)
    write_l3data(0x10,0); 				// 0,0,01,000,0 no reset,384fs,no DCfilter,iis
                                   	
	// Set status register
    write_l3addr(0x14+2); 				// status (000101xx+10)
    write_l3data(0x81,0);				// 1,0,0,0,0,0,11: OGS=0,IGS=0,ADC_NI,DAC_NI,sngl speed,AoffDon

    write_l3addr(0x14+0); 				// data0 (000101xx+00)
    write_l3data(0x0A,0);           	

	// Record mode
    if(cMode)                        	
    {                               	
		write_l3addr(0x14+2); 			// status (000101xx+10)
		write_l3data(0xa2,0); 			// 1,0,1,0,0,0,10: OGS=0,IGS=1,ADC_NI,DAC_NI,sngl speed,AonDoff
	                          			
		write_l3addr(0x14+0); 			// data0 (000101xx+00)
		write_l3data(0xc2,0); 			// 11000, 010	: DATA0, Extended addr(010) 
		write_l3data(0x4d,0); 			// 010, 011, 01	: DATA0, MS=9dB, Ch1=on, Ch2=off, 

   }
}


/*********************************************************************************************
* name:		write_l3addr
* func:		write control data address to 1341 through L3-interface
* para:		ucData -- input, control data address
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void write_l3addr(UINT8T ucData)
{	
    INT32T i,j;

    L3M_LOW();							// L3M=L
    L3C_HIGH();							// L3C=H
                                		
    for(j=0; j<4; j++)					// tsu(L3) > 190ns
    	;                       		
                                		
    for(i=0; i<8; i++)				
    {                           		
		if(ucData&0x1)					// if ucData bit is 'H'
		{                       		
		    L3C_LOW();					// L3C=L
		    L3D_HIGH();					// L3D=H		    
		    for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;	            		
		    L3C_HIGH();					// L3C=H
		    L3D_HIGH();					// L3D=H
		    for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;               		
		}                       		
		else							// if ucData bit is 'L'
		{                       		
		    L3C_LOW();					// L3C=L
		    L3D_LOW();					// L3D=L
		    for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;               		
		    L3C_HIGH();					// L3C=H
		    L3D_LOW();					// L3D=L
		    for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;
		}
		ucData >>= 1;
   }
    L3C_HIGH();							// L3M=H,L3C=H
    L3M_HIGH();
}

/*********************************************************************************************
* name:		write_l3data
* func:		write control data to 1341 through L3-interface
* para:		ucData 	-- input, control data
*			nHalt 	-- input, halt operate
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void write_l3data(UINT8T ucData,int nHalt)
{
    INT32T i,j;
    
    if(nHalt)
    {
        L3C_HIGH();	    				// L3C=H(while tstp, L3 interface halt condition)
        for(j=0; j<4; j++)   			// tstp(L3) > 190ns
        	;                   		
   }                           		
    L3C_HIGH();
    L3M_HIGH();	    					// L3M=H(in data transfer mode)	
    for(j=0; j<4; j++)					// tsu(L3)D > 190ns
    	;	    	

    for( i=0; i<8; i++ )
    {
        if(ucData&0x1)					// if data bit is 'H'
        {                       		
	    	L3M_HIGH();					// L3M=H
	    	L3C_LOW();					// L3C=L
            L3D_HIGH();					// L3D=H
            for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;               		
	    	L3M_HIGH();					// L3M=H
	    	L3C_HIGH();					// L3C=L
	    	L3D_HIGH();      		
            for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;               		
       }                       		
        else							// if data bit is 'L'
        {                       		
	    	L3M_HIGH();					// L3M=H
	    	L3C_LOW();					// L3C=L
	    	L3D_LOW();					// L3D=L
            for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;               		
	    	L3M_HIGH();					// L3M=H
	    	L3C_HIGH();					// L3C=L
	    	L3D_LOW();					// L3D=L
            for(j=0; j<4; j++)			// tcy(L3) > 500ns
		    	;
       }
        ucData >>= 1;
   }
    L3C_HIGH();							// L3M=H,L3C=H
    L3M_HIGH();
}