📄 ac97.c
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rGPECON = rGPECON & ~(0x3ff) | 0x3ff; //GPE[4:0]=AC_SDATA_OUT AC_SDATA_IN AC_nRESET AC_BIT_CLK AC_SYNC
rGPEUP = rGPEUP & ~(0x1f) | 0x1f; //The pull up function is disabled GPE[4:0] 1 1111
*/
//External INT 0
//rGPUP = rGPUP & ~(0x1<<0) |(0x1<<0); //The pull up function is disabled GPUP[0]
rGPCON_L = (rGPCON_L & 0x3ffffc)|(0x2<<0);
rEXTINTC0 = rEXTINTC0 & ~(7<<0) | (0x4<<0); //EINT0=rising edge triggered
//For EINT0 Push Button
//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 AC97_Port_Return(void)
{
//Pop AC97 GPIO port configuration
//rGPECON=save_AC97_rGPECON;
//rGPEDAT=save_AC97_rGPEDAT;
//rGPEUP=save_AC97_rGPEUP;
}
void AC97_Init(void)
{
int i=0;
U8 ch;
Uart_Printf("\nAC97 Initialization...\n");
//Cold Reset
rAC_GLBCTRL = 0x1; // controller and codec cold reset
Delay(1000); // delay for controller safety reset
rAC_GLBCTRL = 0x0; // controller and codec normal mode
Delay(1000);
rAC_GLBCTRL = 0x1;
Delay(1000);
rAC_GLBCTRL = 0x0;
Delay(1000);
//AC-link On
rAC_GLBCTRL = (1<<2);
Delay(1000);
AC97_Controller_State(); //codec ready
//Transfer data enable using AC-link
rAC_GLBCTRL |= (1<<3); // AC97 Data transfer active
Delay(1000);
AC97_Controller_State();
Uart_Printf("\nAC97 Link On...\n");
//Codec Ready Check using Codec Ready Interrupt
Codec_Ready_Irq =0;
pISR_AC97_NFLASH = (unsigned)AC97_Codec_Ready;
ClearPending(BIT_AC97_NFLASH);
rSUBSRCPND=(BIT_SUB_NFLASH|BIT_SUB_AC97);
rINTMSK=~(BIT_AC97_NFLASH);
rINTSUBMSK=~(BIT_SUB_AC97);
rAC_GLBCTRL |= 0x400000;
while(!Codec_Ready_Irq)
{
//Uart_Printf(".");
Delay(3000);
i++;
if(i==20)
break;
}
//Uart_Printf("\n");
if(i==20)
{
Uart_Printf("\nAC97 codec is not ready.");
Uart_Printf("\nCheck on connection between 24A0A and AC97 Codec.\n");
Uart_Printf("\nBye. ");
Codec_Ready = 0;
}
}
void AC97_CodecInit_PD(void)
{
Uart_Printf("\nAC97 Codec Soft Reset\n");
AC97_Codec_Cmd(0,0x00,0x683F); //Codec Soft Reset : 16bit In/Out (stac9766/67)
Uart_Printf("AC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
}
void AC97_CodecInit_PCMIn( U16 AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
Uart_Printf("VRA Enable(1)/Disable(0): 0x%x\n",(0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//ADC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x32,0xbb80);
}
else if(AC97_fs==44100){
//ADC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x32,0xac44);
}
else if(AC97_fs==22050){
//ADC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x32,0x5622);
}
AC97_Codec_Cmd(0,0x26,(1<<9)); //all power on except DAC Block
Uart_Printf("\nAC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
AC97_Codec_Cmd(0,0x10,0x1010); //line in volume on
AC97_Codec_Cmd(0,0x6e,0x0000); //All Analog Mode, ADC Input select => left slot3, right slot4
AC97_Codec_Cmd(0,0x1a,0x0505); //record source select => Stereo Mix
AC97_Codec_Cmd(0,0x1c,0x0909); //record gain is initial
AC97_Codec_Cmd(0,0x78,0x0001); //ADC HPF Bypass
AC97_Codec_Cmd(0,0x20,0x0000); //General Reg.
Input_Volume = AC97_Codec_Cmd(1,0x10,0x0000); //Line In volume
}
void AC97_CodecInit_PCMOut( U16 AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
//Uart_Printf("\nVRA Enable(1)/Disable(0): 0x%x\n", (0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//DAC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x2C,0xbb80);
}
else if(AC97_fs==44100){
//DAC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x2C,0xac44);
}
else if(AC97_fs==22050){
//DAC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x2C,0x5622);
}
AC97_Codec_Cmd(0,0x26, (1<<8)); // all power on except ADC blcok
//Uart_Printf("AC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
AC97_Codec_Cmd(0,0x18,0x0000); // PCM out volume on
AC97_Codec_Cmd(0,0x20,0x0000); // general purpose
AC97_Codec_Cmd(0,0x04,0x1A1A); // Aux out(HP out) volume on
Output_Volume = AC97_Codec_Cmd(1,0x04,0x00000); //HP out volume
}
void AC97_CodecInit_MICIn(U16 AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
Uart_Printf("VRA Enable(1)/Disable(0): 0x%x\n",(0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//ADC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x32,0xbb80);
}
else if(AC97_fs==44100){
//ADC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x32,0xac44);
}
else if(AC97_fs==22050){
//ADC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x32,0x5622);
}
AC97_Codec_Cmd(0,0x26,(1<<9)); //all power on except DAC Block
Uart_Printf("\nAC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
//AC97_Codec_Cmd(0,0x20,0x0000); //MIC1 Selected
//AC97_Codec_Cmd(0,0x6e,0x0024); //ADC Input Slot => left slot6, right slot9, MIC GAIN VAL =1
//AC97_Codec_Cmd(0,0x0e,0x0040); //BOOSTEN =1
//AC97_Codec_Cmd(0,0x1a,0x0000); //Left, Right => MIC
//AC97_Codec_Cmd(0,0x1c,0xff);
//AC97_Codec_Cmd(0,0x78,0x0001); //ADC HPF Bypass
AC97_Codec_Cmd(0,0x20,0x0000); //MIC1 Selected
AC97_Codec_Cmd(0,0x6e,0x0020); //ADC Input Slot => left slot6, right slot9, MIC GAIN VAL =1
AC97_Codec_Cmd(0,0x0e,0x0050); //BOOSTEN =1
AC97_Codec_Cmd(0,0x1a,0x0000); //Left, Right => MIC
AC97_Codec_Cmd(0,0x1c,0x00ff);
AC97_Codec_Cmd(0,0x1e,0x000f);
AC97_Codec_Cmd(0,0x78,0x0001); //ADC HPF Bypass
Input_Volume = AC97_Codec_Cmd(1,0x0e,0x0000); //Mic Volume
}
U16 AC97_Codec_Cmd(U8 CMD_Read, U8 CMD_Offset, U16 CMD_Data)
{
U16 Codec_Stat;
if(CMD_Read == 0)
{
rAC_CODEC_CMD = (0<<23)|(CMD_Offset<<16)|(CMD_Data<<0);
Delay(1);
rAC_CODEC_CMD |= (1<<23); //To receive SLOTREQ bits when VRA is '1'.
}
else if (CMD_Read ==1)
{
rAC_CODEC_CMD = (1<<23)|(CMD_Offset<<16)|(CMD_Data<<0);
Delay(1000);
Codec_Stat = (U16)(rAC_CODEC_STAT & 0xFFFF);
Delay(1000);
return Codec_Stat;
}
else
return 0;
}
void PCM_In_Volume( U8 Up_Down_Volume)
{
if( ( Up_Down_Volume == 'u') | (Up_Down_Volume == 'U') )
{
if (Input_Volume == 0x0000)
{
Uart_Printf("Limit Volume Range!\n");
}
else
{
Input_Volume -= 0x0101;
AC97_Codec_Cmd(0,0x10, Input_Volume); // PCM In Volume Up
Uart_Printf("PCM In Volume Level : 0x%x\n", Input_Volume);
}
}
if ( ( Up_Down_Volume == 'd') | (Up_Down_Volume == 'D') )
{
if (Input_Volume == 0x1F1F)
{
Uart_Printf("Limit Volume Range!\n");
}
else
{
Input_Volume += 0x0101;
AC97_Codec_Cmd(0,0x10, Input_Volume); // PCM In Volume Down
Uart_Printf("PCM In Volume Level : 0x%4x\n", Input_Volume);
}
}
}
void PCM_Out_Volume(U8 Up_Down_Volume)
{
if( ( Up_Down_Volume == 'u') | (Up_Down_Volume == 'U') )
{
if (Output_Volume == 0x0000)
{
Uart_Printf("\nLimit Volume Range!");
}
else
{
Output_Volume -= 0x0101;
AC97_Codec_Cmd(0,0x04, Output_Volume); // PCM out Volume Up
Uart_Printf("\nHeadphone Volume Level (In AC97 Codec 04h Reg.): 0x%x", Output_Volume);
}
}
if ( ( Up_Down_Volume == 'd') | (Up_Down_Volume == 'D') )
{
if (Output_Volume == 0x1F1F)
{
Uart_Printf("\nLimit Volume Range!");
}
else
{
Output_Volume += 0x0101;
AC97_Codec_Cmd(0,0x04, Output_Volume); // PCM out Volume Down
Uart_Printf("\nHeadphone Volume Level (In AC97 Codec 04h Reg.): 0x%x", Output_Volume);
}
}
}
void Download_PCM_File(void)
{
pISR_UART0 = (unsigned)RxInt;
rINTMSK = ~( BIT_UART0);
rINTSUBMSK = ~(BIT_SUB_RXD0);
AC97_BUF = (U8 *)DOWN_BUF;
AC97_temp = AC97_BUF;
Uart_Printf("\nDownload the PCM(no ADPCM) file via UART0 in DNW (With header & CS)!\n");
Uart_Printf("Max of PCM Size: 4M bytes\n");
while(((unsigned int)AC97_temp - (unsigned int)AC97_BUF) < 4)
{
Led_Display(0);
Delay(1500);
Led_Display(15);
Delay(1500);
}
AC97_size = *(AC97_BUF) | *(AC97_BUF + 1)<<8 | *(AC97_BUF + 2)<<16 | *(AC97_BUF + 3)<<24;
Uart_Printf("Now, Downloading... [ File Size : %7d( 0)]",AC97_size);
while(((unsigned int)AC97_temp - (unsigned int)AC97_BUF) < AC97_size)
Uart_Printf("\b\b\b\b\b\b\b\b%7d)",(unsigned int)AC97_temp - (unsigned int)AC97_BUF);
Uart_Printf("\b\b\b\b\b\b\b\b%7d)]\n",(unsigned int)AC97_temp - (unsigned int)AC97_BUF);
rINTSUBMSK |= BIT_SUB_RXD0;
rINTMSK |= BIT_UART0;
AC97_size = *(AC97_BUF + 0x2c) | *(AC97_BUF + 0x2d)<<8 | *(AC97_BUF + 0x2e)<<16 | *(AC97_BUF + 0x2f)<<24;
AC97_size = (AC97_size>>1)<<1;
AC97_fs = *(AC97_BUF + 0x1c) | *(AC97_BUF + 0x1d)<<8 | *(AC97_BUF + 0x1e)<<16 | *(AC97_BUF + 0x1f)<<24;
Play_AC97_BUF = (U32 *)(AC97_BUF + 0x30); //DNW Header + PCM File Header => OffSet: 0x30
Uart_Printf("Sample PCM Data Size = %d\n", AC97_size);
Uart_Printf("Sampling Frequency = %d Hz\n", AC97_fs);
}
void AC97_PCMout_DMA0(U32 PCM_Size)
{
pISR_EINT0_2= (unsigned)Muting;
pISR_DMA= (unsigned)DMA0_Play_Done;
rEINTPEND = 0xffffff;
rSRCPND = BIT_EINT0_2; //to clear the previous pending states
rINTPND = BIT_EINT0_2;
rINTMSK = ~(BIT_DMA|BIT_EINT0_2);
rINTSUBMSK = ~(BIT_SUB_DMA0);
rEINTMASK=~(1<<0);
Play_AC97_BUF=(U32 *)(DOWN_BUF +0x30);
//DMA Ch0 for PCMInitialize
rDISRC0 = (int)Play_AC97_BUF;
rDISRCC0 = (0<<1) + (0<<0); //The source is in the system bus(AHB), Increment
rDIDST0 = ((U32)0x45000018); //PCM Out Data Fifo
rDIDSTC0 = (1<<1) + (1<<0); //The destination is in the peripheral bus(APB), Fixed
rDCON0 = (1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(5<<24)+(1<<23)+(0<<22)+(2<<20)+(PCM_Size/4);
rDMASKTRIG0 = (0<<2) + (1<<1) + (0<<0); //No-stop[2], DMA1 channel On[1], No-sw trigger[0]
//AC97 Initialize
Uart_Printf("\nConnect Head Phone into CON20 (Head Phone Out) on SMDK24A0 and Press Key.\n");
Uart_Getch();
Uart_Printf("\nNow Play...\n");
Uart_Printf("To Volume Up, Press the 'u' key.\n");
Uart_Printf("To Volume Down, Press the 'd' key.\n");
Uart_Printf("To Mute On/Off, Press EINT0 Button.\n");
Uart_Printf("\nIf you want to exit, Press the 'x' key.\n");
Uart_Printf("Headphone Volume Register = 0x%x\n", Output_Volume);
//Transfer data enable using AC-Link
rAC_GLBCTRL = 0x200C;
//Uart_Printf("\nWrite Value to AC_GLBCTRL Reg. =>0x200C\n");
//Uart_Printf("Read Value from AC_GLBCTRL Reg. =>0x%x\n", rAC_GLBCTRL);
Delay(1000);
while(1)
{
//Uart_Printf("STAT3: 0x%x CURR_TC: 0x%x DCDST3: 0x%x\n", rDSTAT3&0x300000, rDSTAT3&0xfffff, rDCDST3);
Up_Down_Volume=Uart_Getch();
if( (Up_Down_Volume == 'x') | (Up_Down_Volume == 'X'))
break;
PCM_Out_Volume(Up_Down_Volume);
}
//ClearPending(BIT_DMA);
rDMASKTRIG0 = (1<<2); //DMA0 stop
rINTSUBMSK|=(BIT_SUB_DMA0);
rINTMSK|= (BIT_DMA | BIT_EINT0_2);
rEINTMASK=0xffffff;
//AC97 PCM In Channel Finish
rAC_GLBCTRL &= ~(1<<13); //PCM Out Transfer Mode Off
Uart_Printf("\nEnd of Play!\n");
}
void AC97_PCMout_INT(U32 PCM_Size)
{
//Record AC97_BUF initialize
Rec_AC97_BUF = (U32 *)(DOWN_BUF);
Play_AC97_BUF = (Rec_AC97_BUF + 0x30);
End_AC97_BUF = (Rec_AC97_BUF + 0x30 + PCM_Size/4);
//IRQ Initialization
pISR_AC97_NFLASH = (unsigned)Irq_AC97_PCMout;
Uart_Printf("\nConnect Head Phone into CON20 on SMDK24A0 and Press any key.\n");
Uart_Getch();
Uart_Printf("\nNow Play...\n");
Uart_Printf("Headphone Volume Register = 0x%x\n", Output_Volume);
ClearPending(BIT_AC97_NFLASH);
rSUBSRCPND=(BIT_SUB_AC97);
rINTMSK=~(BIT_AC97_NFLASH);
rINTSUBMSK=~(BIT_SUB_AC97);
rAC_GLBCTRL = 0x4100C; //PCM Out channel threshold INT enable, PIO Mode On
while(1)
{
if(PCM_Out_INT_Exit == 1)
break;
}
rAC_GLBCTRL &= ~(1<<12); //PCM Out Transfer PIO Mode Off
rINTSUBMSK|=(BIT_SUB_NFLASH|BIT_SUB_AC97);
rINTMSK|=(BIT_AC97_NFLASH);
Uart_Printf("\nEnd of Play!\n");
}
void AC97_PCMin_DMA1(U32 PCM_Size)
{
Rec_AC97_BUF = (U32 *)(DOWN_BUF);
//IRQ Initialize
pISR_DMA = (unsigned)DMA1_Rec_Done;
rINTMSK = ~(BIT_DMA);
rINTSUBMSK = ~(BIT_SUB_DMA1);
//DMA1 Initialize
rDISRC1 = ((U32)0x45000018); //PCM Input Data FIFO
rDISRCC1 = (1<<1) + (1<<0); //APB, Fix
rDIDST1 = (int)Rec_AC97_BUF; //Record AC97_BUF initializ
rDIDSTC1 = (0<<1) + (0<<0); //AHB, Increment
rDCON1 = (1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(5<<24)+(1<<23)+(1<<22)+(2<<20)+(PCM_Size/4);
Uart_Printf("Connect Line In Jack between SMDK24A0(CON19) & Audio source\n");
Uart_Printf("Press any key to start record.\n");
Uart_Getch();
Uart_Printf("Recording...\n");
rDMASKTRIG1 = (0<<2) + (1<<1) + 0; //No-stop, DMA1 channel on, No-sw trigger
// Transfer data enable using AC-Link
rAC_GLBCTRL = 0x80C; // Transfer data enable using AC-Link
//Uart_Printf("\nWrite Value to AC_GLBCTRL Reg. =>0x80C\n");
//Uart_Printf("Read Value from AC_GLBCTRL Reg. =>0x%x\n", rAC_GLBCTRL);
while(AC97_Rec_Done ==0)
{
Uart_Printf(".");
Delay(3000);
//Uart_Printf("STAT1: 0x%x CURR_TC: 0x%x DCDST1: 0x%x\n", rDSTAT1&0x300000, rDSTAT1&0xfffff, rDCDST1);
}
AC97_Rec_Done = 0;
rDMASKTRIG1 = (1<<2); //DMA1 stop
rINTSUBMSK|=(BIT_SUB_DMA1);
rINTMSK|= (BIT_DMA);
//AC97 PCM In Channel Finish
rAC_GLBCTRL &= ~(1<<11); //PCM In Transfer Mode Off
Delay(1000);
Uart_Printf("\nEnd of Record!\n");
}
void AC97_PCMin_INT(U32 PCM_Size)
{
//Record AC97_BUF initialize
Rec_AC97_BUF = (U32 *)(DOWN_BUF);
Play_AC97_BUF = Rec_AC97_BUF + 0x30;
End_AC97_BUF = (Rec_AC97_BUF + 0x30 + PCM_Size/4);
//IRQ Initialization
pISR_AC97_NFLASH= (unsigned)Irq_AC97_PCMin;
Uart_Printf("Connect Line In Jack between SMDK24A0(CON19) & Audio source\n");
Uart_Printf("Press any key to start record.\n");
Uart_Getch();
Uart_Printf("Recording...\n");
ClearPending(BIT_AC97_NFLASH);
rSUBSRCPND=(BIT_SUB_AC97);
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