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cd-rom music player

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georpo

Joined: 18 Nov 2008
Posts: 281
Location: Athens, Greece.

cd-rom music player
Posted: Tue Apr 19, 2011 11:45 am

Hello, Are there any ideas about the commands needed to play audio cd with a low cost IDE cd-rom? I am familiar with the interface, I have already a hard disk drive interface working. I just need the commands for read TOC, play, stop, next track etc. Thanks George.

temtronic

Joined: 01 Jul 2010
Posts: 9246
Location: Greensville,Ontario


Posted: Tue Apr 19, 2011 1:30 pm

You could use google to help you out, simple search revealed 50,000+ 'hits' for me couple of minutes ago.... ..this 'net stuff' is really useful and fast compared to the old dayze...

wslay

Joined: 06 Jun 2009
Posts: 4

Posted: Fri Dec 02, 2011 8:51 am

I think this not easy case to study, you can try my code as below. Good luck to you. Now I have problem as SCSI-2 CD-ROM, if you have good idea, please let me to know.

Code:

/****************************************************************************
* ATAPI IDE CD-ROM Library
*
* If you have any problem, please contact to me.
* Email:[email protected]
* reference: sff8020i.pdf, d1153r18.pdf
* initial v1.0 ---------------------------- 2011.10.07 by WSLAY
* optimun v1.1 ---------------------------- 2011.11.27 by WSLAY
*****************************************************************************/

#include <ATAPI.h>

/****************************************************************************
*** function : void ATAPI_Register(BYTE reg)
*** input data : reg
*** output data : NA
*** description : reg for address pin
*****************************************************************************/
void ATAPI_Reg(BYTE reg)
{
output_bit(ATA_DIOW_PIN, 1);
output_bit(ATA_DIOR_PIN, 1);
output_bit(ATA_CS0_PIN, 0);
output_bit(ATA_CS1_PIN, 0);
output_bit(ATA_DA0_PIN, bit_test(reg, 0));
output_bit(ATA_DA1_PIN, bit_test(reg, 1));
output_bit(ATA_DA2_PIN, bit_test(reg, 2));
}

/****************************************************************************
*** function : ATAPI_input(BYTE reg, BYTE &LSB, BYTE &MSB)
*** input data : reg
*** output data : LSB, MSB
*** description : reg:define register ; LSB&MSB read from ATAPI device data
*****************************************************************************/
void ATAPI_input(BYTE reg, BYTE &LSB, BYTE &MSB)
{
set_tris_LSB(0xFF);
set_tris_MSB(0xFF);
ATAPI_Reg(reg);
output_bit(ATA_CS1_PIN, 1);
output_low(ATA_DIOR_PIN);
delay_cycles(1);
LSB = input_LSB();
MSB = input_MSB();
output_high(ATA_DIOR_PIN);
output_bit(ATA_CS1_PIN, 0);
set_tris_LSB(0x00);
set_tris_MSB(0x00);
delay_cycles(1);
}

/****************************************************************************
*** function : ATAPI_output(BYTE reg, BYTE LSB, BYTE MSB)
*** input data : reg, LSB, MSB
*** output data : NA
*** description : reg:define register ; LSB&MSB write to ATAPI device data
*****************************************************************************/
void ATAPI_output(BYTE reg, BYTE LSB, BYTE MSB)
{
set_tris_LSB(0x00);
set_tris_MSB(0x00);
ATAPI_Reg(reg);
output_bit(ATA_CS1_PIN, 1);
output_LSB(LSB);
output_MSB(MSB);
output_low(ATA_DIOW_PIN);
delay_cycles(1);
output_high(ATA_DIOW_PIN);
output_bit(ATA_CS1_PIN, 0);
delay_cycles(1);
}

/****************************************************************************
*** function : BYTE ATAPI_ReadStatus()
*** input data : NA
*** output data : ATAPI status
*** description : return ATAPI status
*****************************************************************************/
BYTE ATAPI_ReadStatus()
{
return ATAPI_inputLSB(reg_status);
}

/****************************************************************************
*** function : BYTE ATAPI_ReadError()
*** input data : NA
*** output data : ATAPI error
*** description : return ATAPI status
*****************************************************************************/
BYTE ATAPI_ReadError()
{
return ATAPI_inputLSB(reg_error);
}

/****************************************************************************
*** function : BOOLEAN ATAPI_BSY()
*** input data : NA
*** output data : BOOLEAN
*** description : busy flag status
*****************************************************************************/
BOOLEAN ATAPI_BSY()
{
return bit_test(ATAPI_inputLSB(reg_status), BSY);
}

/****************************************************************************
*** function : BOOLEAN ATAPI_RDRY()
*** input data : NA
*** output data : BOOLEAN
*** description : RDRY flag status
*****************************************************************************/
BOOLEAN ATAPI_RDRY()
{
return bit_test(ATAPI_inputLSB(reg_status), RDRY);
}

/****************************************************************************
*** function : BOOLEAN ATAPI_CHECK()
*** input data : NA
*** output data : BOOLEAN
*** description : CHECK flag status
*****************************************************************************/
BOOLEAN ATAPI_CHECK()
{
return bit_test(ATAPI_inputLSB(reg_status), CHECK);
}

/****************************************************************************
*** function : BOOLEAN ATAPI_RDRY()
*** input data : NA
*** output data : BOOLEAN
*** description : DRQ flag status
*****************************************************************************/
BOOLEAN ATAPI_DRQ()
{
return bit_test(ATAPI_inputLSB(reg_status), DRQ);
}

/****************************************************************************
*** function : BOOLEAN ATAPI_waitDRQ()
*** input data : NA
*** output data : BOOLEAN
*** description : wait DRQ flag status
*****************************************************************************/
BOOLEAN ATAPI_waitDRQ()
{
char i = 0, timeout =100;
do
{
delay_ms(10);
}while(++i<timeout && !ATAPI_DRQ());
if (i == timeout) return 0;
return 1;
}

/****************************************************************************
*** function : void ATAPI_devhead(BYTE dev)
*** input data : dev (0=master, 1=slave)
*** output data : NA
*** description : select device head
*****************************************************************************/
void ATAPI_devhead(BYTE dev)
{
BYTE DevHead = ATAPI_inputLSB(reg_devicehead); //select master device
if (dev == 0) bit_clear(DevHead, 4); //Bit4, This bit selects either Device 0 (DRV=0) or 1(DRV=1).
else bit_set(DevHead, 4);
ATAPI_output(reg_devicehead, DevHead, 0xFF);
}

/****************************************************************************
*** function : void ATAPI_PacketCmd(BYTE *PktCmd, BYTE Count)
*** input data : PktCmd data pointer, data Count (normal = 12)
*** output data : NA
*** description : send packet command
*****************************************************************************/
void ATAPI_PacketCmd(BYTE *PktCmd, BYTE Count)
{
BYTE i=0;

//Select master device
ATAPI_devhead(0);

//Set packet size
ATAPI_output(reg_cylow, PktCmdSize, 0xFF);
ATAPI_output(reg_cyhigh, 0x00, 0xFF);

//Packetsize command
ATAPI_output(reg_cmd, 0xA0, 0xFF);

//wait when DRQ = 1
while(!ATAPI_DRQ());

for (i=0; i<Count; i+=2)
{
ATAPI_output(reg_data, PktCmd[i], PktCmd[i+1]);
}
}

/****************************************************************************
*** function : BYTE ATAPI_inputLSB(BYTE reg)
*** input data : reg
*** output data : BYTE (LSB data)
*** description : reg:define register ; LSB read from ATAPI device data
*****************************************************************************/
BYTE ATAPI_inputLSB(BYTE reg)
{
BYTE LSB, MSB;
ATAPI_input(reg, LSB, MSB);
return LSB;
}

/****************************************************************************
*** function : void ATAPI_ReadPacketData(BYTE Count)
*** input data : read count
*** output data : public data array
*** description : assign read out count
*****************************************************************************/
void ATAPI_ReadPacketData(BYTE Count)
{
BYTE LSB, MSB, i;
for (i=0; i<Count; i+=2)
{
ATAPI_waitDRQ();
ATAPI_input(reg_data, LSB, MSB);
tempPktData[i] = LSB;
tempPktData[i+1] = MSB;
}
}

/****************************************************************************
*** function : void ATAPI_Test()
*** input data : NA
*** output data : NA
*** description : test ATAPI device
*****************************************************************************/
void ATAPI_Test()
{
BYTE PktCmd[12] = {0};
ATAPI_PacketCmd(&PktCmd[0], 12);
}

/****************************************************************************
*** function : void ATAPI_Eject(TEJECT MODE)
*** input data : MODE
*** output data : NA
*** description : STOP=0, START=1, EJECT=2, LOAD=3
*****************************************************************************/
void ATAPI_Eject(TEJECT MODE)
{
BYTE PktCmd[12] = {0};
PktCmd[0] = 0x1B;
PktCmd[4] = MODE;
ATAPI_PacketCmd(&PktCmd[0], 12);
}

/****************************************************************************
*** function : void ATAPI_PlayMSF()
*** input data : NA
*** output data : NA
*** description : play music
*****************************************************************************/
void ATAPI_PlayMSF()
{
BYTE PktCmd[12] = {0};
PktCmd[0] = 0x47;
PktCmd[3] = StartM;
PktCmd[4] = StartS;
PktCmd[5] = StartF;
PktCmd[6] = EndM;
PktCmd[7] = EndS;
PktCmd[8] = EndF;
ATAPI_PacketCmd(&PktCmd[0], 12);
}

/****************************************************************************
*** function : void ATAPI_Stop()
*** input data : NA
*** output data : NA
*** description : stop play music
*****************************************************************************/
void ATAPI_Stop()
{
BYTE PktCmd[12] = {0};
PktCmd[0] = 0x4E; //STOP/SCAN Command
ATAPI_PacketCmd(&PktCmd[0], 12);
}

/****************************************************************************
*** function : void ATAPI_Pause(BOOLEAN flag)
*** input data : flag
*** output data : NA
*** description : flag = 1 as true
*****************************************************************************/
void ATAPI_Pause(BOOLEAN flag)
{
BYTE PktCmd[12] = {0};
PktCmd[0] = 0x4B; //PAUSE/RESUME Command
PktCmd[8] = flag; //1:PAUSE
ATAPI_PacketCmd(&PktCmd[0], 12);
}

/****************************************************************************
*** function : void ATAPI_Next(BYTE NP)
*** input data : NA
*** output data : NA
*** description : play next music
*****************************************************************************/
void ATAPI_Next()
{
ATAPI_ReadSub(); //Read current MSF?
if (++CurrentTrackNum > EndTrackNum) CurrentTrackNum = EndTrackNum;
ATAPI_ReadTOC(CurrentTrackNum);
ATAPI_PlayMSF(); //play MSF
}

/****************************************************************************
*** function : void ATAPI_Prevous()
*** input data : NA
*** output data : NA
*** description : play prev music
*****************************************************************************/
void ATAPI_Prevous()
{
ATAPI_ReadSub(); //Read current MSF?
if (--CurrentTrackNum < StartTrackNum) CurrentTrackNum = StartTrackNum;
ATAPI_ReadTOC(CurrentTrackNum);
ATAPI_PlayMSF(); //play MSF
}

/****************************************************************************
*** function : void ATAPI_ReadTOC(BYTE Track)
*** input data : Track
*** output data : NA
*** description : Read MSF; Track = 0xAA, read end track number
*****************************************************************************/
void ATAPI_ReadTOC(BYTE Track)
{
BYTE PktCmd[12] = {0};
BYTE Count = 12;
PktCmd[0] = 0x43; // Bit 7 6 5 4 3 2 1 0
PktCmd[1] = 0x02; // R R R R R R MSF R
PktCmd[6] = Track; // Starting Track / Session Number
PktCmd[8] = Count; // Allocation Length (LSB)
ATAPI_PacketCmd(&PktCmd[0], 12);

if (!ATAPI_waitDRQ()) return;

ATAPI_ReadPacketData(Count);
StartTrackNum = tempPktData[2];
EndTrackNum = tempPktData[3];
if (Track == 0xAA)
{
EndM = tempPktData[9];
EndS = tempPktData[10];
EndF = tempPktData[11];
}else
{
StartM = tempPktData[9];
StartS = tempPktData[10];
StartF = tempPktData[11];
}
}

/****************************************************************************
*** function : void ATAPI_ReadSub()
*** input data : NA
*** output data : NA
*** description : Read current MSF
*****************************************************************************/
void ATAPI_ReadSub()
{
BYTE PktCmd[12] = {0};
BYTE Count = 16;
PktCmd[0] = 0x42; // Bit 7 6 5 4 3 2 1 0
PktCmd[1] = 0x02; // R R R R R R MSF R
PktCmd[2] = 0x40; // R SubQ R R R R R R
PktCmd[3] = 0x01; // Sub-channel Data Format
PktCmd[8] = Count; // Allocation Length (LSB)
ATAPI_PacketCmd(&PktCmd[0], 12);

if (!ATAPI_waitDRQ()) return;
ATAPI_ReadPacketData(Count);

AudioStatus = tempPktData[1];
CurrentTrackNum = tempPktData[6];
CurrentM = tempPktData[9];
CurrentS = tempPktData[10];
CurrentF = tempPktData[11];
}

/****************************************************************************
*** function : void ATAPI_Inquiry()
*** input data : NA
*** output data : NA
*** description : Inquiry device function, Vendor[8];Product[16];Revision[4];
*****************************************************************************/
void ATAPI_Inquiry()
{
BYTE i =0 ;
BYTE PktCmd[12] = {0};
BYTE Count = 36;
PktCmd[0] = 0x12;
PktCmd[4] = Count;
ATAPI_PacketCmd(&PktCmd[0], 12);

//while(!ATAPI_DRQ());
ATAPI_ReadPacketData(Count);
for (i=8; i<16; i++) Vendor[i-8] = tempPktData[i];
for (i=16; i<32; i++) Product[i-16] = tempPktData[i];
for (i=32; i<Count; i++) Revision[i-32] = tempPktData[i];
while(ATAPI_DRQ()) ATAPI_inputLSB(reg_data); //Readout all data from CD-ROM buffer.
}

/****************************************************************************
*** function : BOOLEAN ATAPI_ReadCDInfo()
*** input data : 1 = OK; 0= fail
*** output data : NA
*** description : read infomation
*****************************************************************************/
BOOLEAN ATAPI_ReadCDInfo()
{
BYTE i = 0, timeout = 10;
do
{
ATAPI_ReadSub();
delay_ms(10);
ATAPI_ReadTOC(0xAA);
}while((++i<timeout) && (CurrentTrackNum != 1));

if (i == timeout) return 0;
ATAPI_ReadTOC(0);
return 1;
}

/****************************************************************************
*** function : BOOLEAN ATAPI_initCDROM()
*** input data : NA
*** output data : 0: no error
*** description : init ATAPI device
*****************************************************************************/
int ATAPI_initCDROM()
{
delay_ms(50);
output_drive(ATA_DA0_PIN);
output_drive(ATA_DA1_PIN);
output_drive(ATA_DA2_PIN);
output_drive(ATA_DIOW_PIN);
output_drive(ATA_DIOR_PIN);
output_drive(ATA_CS0_PIN);
output_drive(ATA_CS1_PIN);
output_drive(ATA_RST_PIN);
ATAPI_Reg(reg_data);

output_low(ATA_RST_PIN);
delay_ms(10);
output_high(ATA_RST_PIN);
delay_ms(50);
while (ATAPI_BSY());
delay_ms(300); //for some CD-ROM response slower, ex:TEAC CD-W552E

//sdelect master device
ATAPI_devhead(0);

//Check device as ATAPI CD-ROM
if((ATAPI_inputLSB(reg_cylow)) != 0x14 || (ATAPI_inputLSB(reg_cyhigh) != 0xEB))
{
return ATA_notATAPI_Error;
}

//Self test
ATAPI_output(reg_cmd, 0x90, 0xFF);

while(ATAPI_BSY());
BYTE RetCode = ATAPI_ReadError();
if ((RetCode != 0x01) && (RetCode != 0x81)) //01h device0 passed, Device 1 passed or not present ;dev=1, device 1 passed
{
return ATA_SelfTest_Error; //81h device0 passed, Device 1 fail ; dev=1, 00h, 02h-7Fh device 1 failed
}

//Identify packet device
ATAPI_output(reg_cmd, 0xA1, 0xFF);
while(!ATAPI_DRQ()); //DRQ=1 data ready read.
BYTE Byte0 = ATAPI_inputLSB(reg_data)<<6; //Byte0-> bit0-1 00:12 byte command packet; 01:16 byte command packet
if (Byte0 == 0) PktCmdSize = 12; //12byte 6word
else if (Byte0 == 0x40) PktCmdSize = 16; //16byte 6word
else return ATA_PacketSize_Error;
while(ATAPI_DRQ()) ATAPI_inputLSB(reg_data); //Readout all data from CD-ROM buffer.

//Test device as ready
while(ATAPI_CHECK()) ATAPI_Test();
ATAPI_Inquiry();
return 0;
}

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