iis.c

iis.c iis.h重要的嵌入式源程序

#include "44b.h"
#include "44blib.h"
#include "def.h"
#include "iis.h"

void _WrL3Addr(U8 data);
void _WrL3Data(U8 data,int halt);
void __irq BDMA0_PLAY(void);
void __irq BDMA0_Done(void);
void Init1341(char);

#define L3D (0x200)
#define L3M (0x10)
#define L3C (0x20)

#define TESTSIZE 700000//1000//100
//for test
//static short int Buf[TESTSIZE];
//for down
unsigned char *Buf,*_temp;
unsigned char *rec_buf;

#define PLAY 0
#define RECORD 1
#define REC_LEN	0xF0000

volatile unsigned int size=0;
volatile unsigned int leng,ssize;
volatile char Rec_Done=0;
volatile char mute=1;


void Test_Iis(void)
{
    U32 i;

    ChangePllValue(0x49,0x7,0x1);	//MCLK=45.1584MHz <-- 5.6448MHz*8
    Uart_Init(45000000,115200);
    Uart_Printf("S3C44B0 IIS Test\n");
    
    rPCONE=(rPCONE&0xffff)+(2<<16); //PE:CODECLK
    pISR_BDMA0=(unsigned)BDMA0_Done; //修改中断处理函数指针

//for down
    rINTMSK&=~(BIT_GLOBAL|BIT_BDMA0);//中断使能
    Buf=(unsigned char *)0xc400000;
    _temp=(unsigned char *)0x14b000;
    
    for(i=0XC400000;i<(0XC400000+0XF0000);i+=4)  //i=i+4
    {
	*((volatile unsigned *)i)=0x0;  //加入volatile   的修饰表示的是，那个地址里面的数据是不确定情况下就可以改变的内容
    }

    //Uart_Printf("Download the PCM(no ADPCM) wave file by wkcom2(with header)!!\n");

    while ((unsigned int)Buf<(0XC400000+0XF0000))
    {
       (*Buf)=(*_temp);
       Buf++;
	_temp++;
    }
	Buf=(unsigned char *)0xc400000;
    size=*(Buf) | *(Buf+1)<<8 | *(Buf+2)<<16 | *(Buf+3)<<24;
    leng=0xf0000;
  //  size=*(Buf+0x2c) | *(Buf+0x2d)<<8 | *(Buf+0x2e)<<16 | *(Buf+0x2f)<<24;
    size=(size>>1)<<1;
    //Uart_Printf("sample size=0x%x\n",size/2);
    Uart_Printf("\nNow play the wave file\n");

   Init1341(PLAY);
    /****** BDMA0 Initialize ******/
//for down
    rBDISRC0=(1<<30)+(1<<28)+(int)(Buf+0x30);	//Half word,inc,Buf
    rBDIDES0=(1<<30)+(3<<28)+((int)rIISFIF);	//M2IO,fix,IISFIF
    rBDICNT0=(1<<30)+(1<<26)+(3<<22)+(1<<21)+(1<<20)+size;
    rBDCON0 = 0x0<<2;
  
    /****** IIS Initialize ******/
    rIISCON=0x22;	//Tx DMA enable,Rx idle,prescaler enable
    rIISMOD=0x89;	//Master,Tx,L-ch=low,iis,16bit ch.,codeclk=256fs,lrck=32fs
    rIISPSR=0x33;	//Prescaler_A/B enable, value=3
    rIISFCON=0xa00;	//Tx/Rx DMA,Tx/Rx FIFO --> start piling....

    Uart_Printf("Push any key to exit!!!\n");
    /****** IIS Tx Start ******/
    rIISCON |=0x1;

    Uart_Getch(); 

    /****** IIS Tx Stop ******/
    rIISCON=0x0;    //IIS stop
    rBDICNT0=0x0;   //BDMA stop
//for down
    free(Buf);
    Cache_Flush();
    rNCACHBE0=0x0;
    size=0;

   rINTMSK|=BIT_BDMA0;
    ChangePllValue(PLL_M,PLL_P,PLL_S);	//MCLK=40MHz
    Uart_Init(0,115200);
}

void Init1341(char mode)
{
    /****** Port Initialize ******/
    rPCONA = 0x1ff;	//PA9(out):L3D
    rPCONB = 0x7CF;	//PB4:L3M, PB5:L3C
  

    rPDATB = L3M|L3C;	//L3M=H(start condition)
    			//L3C=H(start condition)

    /****** L3 Interface ******/
    _WrL3Addr(0x14+2);	//status (000101xx+10)
#ifdef FS441KHZ
    _WrL3Data(0x60,0); //0,1,10,000,0 reset,256fs,no DCfilter,iis
#else
    _WrL3Data(0x40,0); //0,1,00,000,0 reset,512fs,no DCfilter,iis
#endif

    _WrL3Addr(0x14+2); //status (000101xx+10)
#ifdef FS441KHZ
    _WrL3Data(0x20,0); //0,0,10,000,0 no reset,256fs,no DCfilter,iis
#else
    _WrL3Data(0x00,0); //0,0,00,000,0 no reset,512fs,no DCfilter,iis
#endif
    
    _WrL3Addr(0x14+2); //status (000101xx+10)
    _WrL3Data(0x81,0);
//    //1,0,0,0,0,0,11 OGS=0,IGS=0,ADC_NI,DAC_NI,sngl speed,AonDon
    _WrL3Addr(0x14+0); //DATA0 (000101xx+00)
    _WrL3Data(0x00,0);
    
//record
    if(mode)
    {
	_WrL3Addr(0x14+2); //STATUS (000101xx+10)
	_WrL3Data(0xa2,0); ////1,0,1,0,0,0,10	: OGS=0,IGS=1,ADC_NI,DAC_NI,sngl speed,AonDoff

	_WrL3Addr(0x14+0); //DATA0 (000101xx+00)
	_WrL3Data(0xc2,0); //11000,010	: DATA0, Extended addr(010) 
	_WrL3Data(0x45,0); //010,001,01	: DATA0, MS=0dB, Ch1=on Ch2=off, 
    }
//record
}


void _WrL3Addr(U8 data)
{	
    S32 i,j;

    rPDATB &= (~L3M);	//L3M=L
    rPDATB |= L3C;	//L3C=H

    for(j=0;j<4;j++);		//tsu(L3) > 190ns

    //PA9:L3D PB4:L3M PB5:L3C
    for(i=0;i<8;i++)		
    {
	if(data&0x1)//if data bit is 'H'
	{
	    rPDATB &= (~L3C);	//L3C=L
	    rPDATA |= L3D;	//L3D=H		    
	    for(j=0;j<4;j++);	//tcy(L3) > 500ns
	    rPDATB |= L3C;	//L3C=H
	    rPDATA |= L3D;	//L3D=H
	    for(j=0;j<4;j++);	//tcy(L3) > 500ns
	}
	else		//if data bit is 'L'
	{
	    rPDATB&=(~L3C);	//L3C=L
	    rPDATA&=(~L3D);	//L3D=L
	    for(j=0;j<4;j++);	//tcy(L3) > 500ns
	    rPDATB|=L3C;		//L3C=H
	    rPDATA&=(~L3D);	//L3D=L
	    for(j=0;j<4;j++);	//tcy(L3) > 500ns
	}
	data >>=1;
    }
    rPDATB |=L3C|L3M;	//L3M=H,L3C=H
}


void _WrL3Data(U8 data,int halt)
{
    U32 vPdata = 0x0;   //L3D=L
    U32 vPdatb = 0x0;	//L3M/L3C=L
    S32 i,j;
    if(halt)
    {
        rPDATB|=L3C;	    //L3C=H(while tstp, L3 interface halt condition)
        for(j=0;j<4;j++);   //tstp(L3) > 190ns
    }
    rPDATB|=L3C|L3M;	    //L3M=H(in data transfer mode)	
    for(j=0;j<4;j++);	    //tsu(L3)D > 190ns

    //PA9:L3MODE PG6:L3DATA PG7:L3CLOCK
    for(i=0;i<8;i++)
    {
        if(data&0x1)	//if data bit is 'H'
        {
	 //   rPDATB=L3M;		//L3C=L
           rPDATB&=(~L3C);	 
           rPDATA|=L3D;		//L3D=H
            for(j=0;j<4;j++);	//tcy(L3) > 500ns
           rPDATB=L3C|L3M;	//L3C=H,L3D=H
	    rPDATA=L3D;
            for(j=0;j<4;j++);	//tcy(L3) > 500ns
        }
        else		//if data bit is 'L'
        {
            rPDATB&=(~L3C);		//L3C=L
            rPDATA&=(~L3D);	//L3D=L
            for(j=0;j<4;j++);	//tcy(L3) > 500ns
            rPDATB|=L3C|L3M;	//L3C=H
	    rPDATA&=(~L3D);	//L3D=L
            for(j=0;j<4;j++);	//tcy(L3) > 500ns
        }
        data>>=1;
    }
    rPDATB|=L3C|L3M;	//L3M=H,L3C=H
}


void __irq BDMA0_Done(void)
{
    rI_ISPC=BIT_BDMA0;	//clear pending bit
    WrUTXH0('&');
	rIISCON|=0x1;
}