S3C2410 IIS總線sample code 分析

作者：時間：2016-11-11 來源：網(wǎng)絡(luò)

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MMRESULTwaveInClose(HWAVEOUThwi)

{

本文引用地址：http://www.ex-cimer.com/article/201611/316667.htm

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

rIISCON=0x0;//IISInterfacestop

rIISFCON=0x0;//ForFIFOflush

rCLKCON&=~0x20000;//disableIIScolock

//rMPLLCON=save_MPLLCON;//restoreMPLLCONvalue

SetSysFclk(save_MPLLCON);

RecStatus.Status=DEVICE_FREE;

ReleaseDMA(RecStatus.DevReq);

if((RecStatus.DevReq&0xff)==0x12)

DisableIrq(BIT_DMA1);

if((RecStatus.DevReq&0xff)==0x21)

DisableIrq(BIT_DMA2);

returnMMSYSERR_NOERROR;

}

MMRESULTwaveInStart(HWAVEINhwi)

{

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

if(!RecTotBlks)

returnMMSYSERR_NOMEM;

SetRecDma();

//{48000,(123<<12)|(6<<4)|0,(3<<5)|3,0}};

rIISPSR=CodecPara[RecStatus.FsIdx].PreScaler;

rIISCON=(0<<5)+(1<<4)+(1<<3)+(0<<2)+(1<<1);//TxDMAdisable,RxDMAenable,Txidle,Rxnotidle,prescalerenable,stop

rIISMOD=(0<<8)+(1<<6)+(0<<5)+(1<<4)+((RecStatus.wBitsPerSample>>4)<<3)+(CodecPara[RecStatus.FsIdx].ofs<<2)+(1<<0);

//Mastermode[8],Rxmode[7:6],LowforLeftChannel[5],IISformat[4],16/8bit[3],256/384fs[2],IISCLK32fs[1:0]

rIISFCON=(1<<14)+(1<<12);//RxDMA,RxFIFO-->startpiling....

rIISCON|=0x1;//startIIS

returnMMSYSERR_NOERROR;

}

MMRESULTwaveInStop(HWAVEINhwi)

{

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

rIISCON=0x0;//IISInterfacestop

rIISFCON=0x0;//ForFIFOflush

StopDMA(RecStatus.DevReq);

returnMMSYSERR_NOERROR;

}

MMRESULTwaveInPrepareHeader(HWAVEINhwi,LPWAVEHDRpwh,UINTcbwh)

{

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

pwh->lpNext=0;

pwh->dwBytesRecorded=0;

pwh->dwUser=0;

pwh->dwFlags=0;

returnMMSYSERR_NOERROR;

}

MMRESULTwaveInUnprepareHeader(HWAVEINhwi,LPWAVEHDRpwh,UINTcbwh)

{

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

returnMMSYSERR_NOERROR;

}

//每次循環(huán)指針pwh值都不一樣他們是個連續(xù)的數(shù)組，這個函數(shù)的作用就是將數(shù)組中的數(shù)據(jù)組成一個鏈表

MMRESULTwaveInAddBuffer(HWAVEINhwi,LPWAVEHDRpwh,UINTcbwh)

{

if((RecStatus.handle!=hwi)||(RecStatus.Status!=DEVICE_REC))

returnMMSYSERR_INVALHANDLE;

if(!RecTotBlks)

{

lpRecFstBlk=pwh;

lpRecCurBlk=lpRecFstBlk;//最開始播放的數(shù)據(jù)

}

else

{

lpRecLstBlk->lpNext=pwh;

}

lpRecLstBlk=pwh;

pwh->lpNext=0;

RecTotBlks++;

returnMMSYSERR_NOERROR;

}

MMRESULTwaveInReset(HWAVEOUThwi)

{

returnMMSYSERR_NOERROR;

}

/*************************ControlFunction*********************/

staticvoidIIS_PortSetting(void)

{

//----------------------------------------------------------

//PORTBGROUP

//Ports:GPB4GPB3GPB2

//Signal:L3CLOCKL3DATAL3MODE

//Setting:OUTPUTOUTPUTOUTPUT

//[9:8][7:6}[5:4]

//Binary:01,0101

//----------------------------------------------------------

rGPBUP=rGPBUP&~(0x7<<2)|(0x7<<2);//ThepullupfunctionisdisabledGPB[4:2]11100

rGPBCON=rGPBCON&~(0x3f<<4)|(0x15<<4);//GPB[4:2]=Output(L3CLOCK):Output(L3DATA):Output(L3MODE)

//----------------------------------------------------------

//PORTEGROUP

//Ports:GPE4GPE3GPE2GPE1GPE0

//Signal:I2SSDOI2SSDICDCLKI2SSCLKI2SLRCK

//Binary:10,1010,1010

//----------------------------------------------------------

rGPEUP=rGPEUP&~(0x1f)|0x1f;//ThepullupfunctionisdisabledGPE[4:0]11111

rGPECON=rGPECON&~(0x3ff)|0x2aa;//GPE[4:0]=I2SSDO:I2SSDI:CDCLK:I2SSCLK:I2SLRCK

}

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

#defineL3C(1<<4)//GPB4=L3CLOCK

#defineL3D(1<<3)//GPB3=L3DATA

#defineL3M(1<<2)//GPB2=L3MODE

staticvoid_WrL3Addr(U8data)

{

S32i,j;

rGPBDAT=rGPBDAT&~(L3D|L3M|L3C)|L3C;//L3D=L,L3M=L(inaddressmode),L3C=H

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

//GPB[4:2]=L3C3D3M

for(i=0;i<8;i++)//LSBfirst

{

if(data&0x1)//IfdatasLSBisH

{

rGPBDAT&=~L3C;//L3C=L

rGPBDAT|=L3D;//L3D=H

for(j=0;j<4;j++);//tcy(L3)>500ns

rGPBDAT|=L3C;//L3C=H

rGPBDAT|=L3D;//L3D=H

for(j=0;j<4;j++);//tcy(L3)>500ns

}

else//IfdatasLSBisL

{

rGPBDAT&=~L3C;//L3C=L

rGPBDAT&=~L3D;//L3D=L

for(j=0;j<4;j++);//tcy(L3)>500ns

rGPBDAT|=L3C;//L3C=H

rGPBDAT&=~L3D;//L3D=L

for(j=0;j<4;j++);//tcy(L3)>500ns

}

data>>=1;

}

rGPBDAT=rGPBDAT&~(L3D|L3M|L3C)|(L3C|L3M);//L3M=H,L3C=H

}

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

staticvoid_WrL3Data(U8data,inthalt)

{

S32i,j;

if(halt)

{

rGPBDAT=rGPBDAT&~(L3D|L3M|L3C)|L3C;//L3C=H(whiletstp,L3interfacehaltcondition)

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

}

rGPBDAT=rGPBDAT&~(L3D|L3M|L3C)|(L3C|L3M);//L3M=H(indatatransfermode)

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

//GPB[4:2]=L3C3D3M

for(i=0;i<8;i++)

{

if(data&0x1)//ifdatasLSBisH

{

rGPBDAT&=~L3C;//L3C=L

rGPBDAT|=L3D;//L3D=H

for(j=0;j<4;j++);//tcy(L3)>500ns

rGPBDAT|=(L3C|L3D);//L3C=H,L3D=H

for(j=0;j<4;j++);//tcy(L3)>500ns

}

else//IfdatasLSBisL

{

rGPBDAT&=~L3C;//L3C=L

rGPBDAT&=~L3D;//L3D=L

for(j=0;j<4;j++);//tcy(L3)>500ns

rGPBDAT|=L3C;//L3C=H

rGPBDAT&=~L3D;//L3D=L

for(j=0;j<4;j++);//tcy(L3)>500ns

}

data>>=1;//Forchecknextbit

}

rGPBDAT=rGPBDAT&~(L3D|L3M|L3C)|(L3C|L3M);//L3M=H,L3C=H

}

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

staticvoidInit1341(charmode)

{

U16FsIdx;

//PortInitialize

//----------------------------------------------------------

//PORTBGROUP

//Ports:GPB4GPB3GPB2

//Signal:L3CLOCKL3DATAL3MODE

//Setting:OUTPUTOUTPUTOUTPUT

//[9:8][7:6}[5:4]

//Binary:01,0101

//----------------------------------------------------------

rGPBDAT=rGPBDAT&~(L3M|L3C|L3D)|(L3M|L3C);//Startcondition:L3M=H,L3C=H

rGPBUP=rGPBUP&~(0x7<<2)|(0x7<<2);//ThepullupfunctionisdisabledGPB[4:2]11100

rGPBCON=rGPBCON&~(0x3f<<4)|(0x15<<4);//GPB[4:2]=Output(L3CLOCK):Output(L3DATA):Output(L3MODE)

//L3Interface

_WrL3Addr(0x14+2);//STATUS(000101xx+10)

_WrL3Data(0x60,0);//0,1,10,000,0:Status0,Reset,256fs,IIS-bus,noDC-filtering

_WrL3Addr(0x14+2);//STATUS(000101xx+10)

FsIdx=mode?RecStatus.FsIdxlayStatus.FsIdx;

if(CodecPara[FsIdx].ofs)

_WrL3Data(0x18,0);//0,0,01,000,0:Status0,Noreset,384fs,IIS-bus,noDC-filtering

else

_WrL3Data(0x28,0);//0,0,10,000,0:Status0,Noreset,256fs,IIS-bus,noDC-filtering

_WrL3Addr(0x14+2);//STATUS(000101xx+10)

_WrL3Data(0xc1,0);//1,0,0,0,0,0,01

//Status1,GainofDAC6dB,GainofADC0dB,ADCnon-inverting,DACnon-inverting

//,Singlespeedplayback,ADC-OffDAC-On

//Record

if(mode){

_WrL3Addr(0x14+2);//STATUS(000101xx+10)

//_WrL3Data(0xa2,0);//1,0,1,0,0,0,10

//Status1,GainofDAC0dB,GainofADC6dB,ADCnon-inverting,DACnon-inverting

//,Singlespeedplayback,ADC-OnDAC-Off

_WrL3Data(0xe3,0);//1,1,1,0,0,0,11

//Status1,GainofDAC6dB,GainofADC6dB,ADCnon-inverting,DACnon-inverting

//,Singlespeedplayback,ADC-OnDAC-On,DAC打開使錄音時可從耳機聽到聲音

//_WrL3Addr(0x14+0);//DATA0(000101xx+00)

//_WrL3Data(0x3f,0);//00,111111:Volumecontrol(6bits)

//_WrL3Data(0x00,0);//00,000000:Volumecontrol(6bits)0dB

_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0x7b,0);//01,1110,11:Data0,BassBoost18~24dB,Treble6dB

//_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0xc4,0);//11000,100:Extendedaddr(3bits),100

//_WrL3Data(0x90,0);//100,100,00:DATA0,EnableAGC,00,inputamplifiergainchannel2(2bits)

_WrL3Data(0xf0,0);//111,100,00:DATA0,EnableAGC,00,inputamplifiergainchannel2(2bits)

//_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0xc0,0);//11000,000:Extendedaddr(3bits),000

_WrL3Data(0xe4,0);//111,00000:MA=0dB

_WrL3Data(0xc1,0);//11000,001:Extendedaddr(3bits),001

_WrL3Data(0xe4,0);//111,00000:MB=0dB

//_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0xc2,0);//11000,010:Extendedaddr(3bits),010

//_WrL3Data(0x59,0);//010,110,01:DATA0,MICAmplifierGain27dB,inputchannel1select(inputchannel2off)

_WrL3Data(0xf9,0);//111,110,11:DATA0,MICAmplifierGain27dB,input1XMA+input2XMB

}

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

staticvoidPlayPause(U8mode)

{

if(mode)

rIISCON&=~1;//stopiis

else

rIISCON|=1;//startiis

}

#defineMAX_VOLUME61

staticvoidAdjVolume(U16volume)

{

rGPBDAT=rGPBDAT&~(L3M|L3C|L3D)|(L3M|L3C);//Startcondition:L3M=H,L3C=H

rGPBUP=rGPBUP&~(0x7<<2)|(0x7<<2);//ThepullupfunctionisdisabledGPB[4:2]11100

rGPBCON=rGPBCON&~(0x3f<<4)|(0x15<<4);//GPB[4:2]=Output(L3CLOCK):Output(L3DATA):Output(L3MODE)

volume=(volume*MAX_VOLUME)/0xffff;

_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(MAX_VOLUME-volume,0);

}

staticvoidMuting(void)

{

if(mute)//Mute

{

_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0xa4,0);//10,1,00,1,00:after,node-emp,mute,flat

mute=0;

}

else//Nomute

{

_WrL3Addr(0x14+0);//DATA0(000101xx+00)

_WrL3Data(0xa0,0);//10,1,00,0,00:after,node-emp,nomute,flat

mute=1;

}

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